US3266312A - Level indicator sending unit - Google Patents

Level indicator sending unit Download PDF

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Publication number
US3266312A
US3266312A US345413A US34541364A US3266312A US 3266312 A US3266312 A US 3266312A US 345413 A US345413 A US 345413A US 34541364 A US34541364 A US 34541364A US 3266312 A US3266312 A US 3266312A
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cover
rods
conduit
sending unit
tank
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Expired - Lifetime
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US345413A
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Richard B Coleman
Neal E Neese
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Motors Liquidation Co
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Motors Liquidation Co
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Publication date
Application filed by Motors Liquidation Co filed Critical Motors Liquidation Co
Priority to US345413A priority Critical patent/US3266312A/en
Priority to GB3764/65A priority patent/GB1078226A/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F23/00—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm
    • G01F23/30—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats
    • G01F23/64—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements
    • G01F23/68—Indicating or measuring liquid level or level of fluent solid material, e.g. indicating in terms of volume or indicating by means of an alarm by floats of the free float type without mechanical transmission elements using electrically actuated indicating means

Definitions

  • This invention relates to liquid level indicators and more particularly to sending units suitable for use in liquid fuel tanks and by means of which signals may be imparted to liquid level indicators such as gages.
  • An object of the present invention is to provide a combined suction line and signal sending unit which is low in cost, convenient to install in a tank and such as to present a base readily receiving a filter element as a part of the unitand adapted to clarify fluid to be discharged from the tank.
  • a feature of the invention is a combined suction line and sending unit having a cover or support for multiple rods and a conduit, the rods being utilized in conveying a signal current and cooperating with the conduit to guide a float.
  • Another feature is a sending unit employing a resistance and having a conduit for guiding a float and a base forming a convenient attachment for filter means through which fluid may pass on its way to the conduit.
  • FIGURE 1 is a side view of an automotive gasoline tank, a portion of which is broken away showing the installation of a sending unit representing one embodiment of the present invention
  • FIGURE 2 is a view, drawn to a larger scale, of the sending unit shown in FIGURE 1 with portions of the sending unit broken away and a portion of the top wall of the tank shown in section;
  • FIGURE 3 is a view drawn partly in section as viewed in the direction of the arrows 33 in FIGURE 2;
  • FIGURE 4 is a sectional view looking in the direction of the arrows 44 in FIGURE 2;
  • FIGURE 5 is a sectional view looking in the direction of the arrows 55 in FIGURE 2.
  • An automotive type fuel tank is shown at having a top wall 12 with a discharge opening therein shown at 14 as being reinforced by a stiffening ring 16.
  • a support 18 is formed as a cover for the opening 14 and is so made as to be attachable to the tank by means of screws 20 with a sealing gasket 22 interposed.
  • the cover 18 is preferably injection molded of plastic material in such a way as to include a right angle portion 24 defining a right angle suction passage.
  • One side of the cover 18 is formed to constitute a tube-like projection or nipple 26 suitable for the attachment of a suction line such as indicated at 28.
  • a tube portion 30 Depending from the main body of the cover 18 is a tube portion 30.
  • a conduit 32 is pressed on the tube portion 30 so that the passage from the portion 24 is thereby extended downwardly a substantial distance and below a metal base plate 34.
  • This base plate surrounds the conduit 32 and is joined to the cover 18 and in spaced relation with the latter by means of three rods 36, 38 and 40.
  • the rod 36 is retained at one end within the cover 18 in such a way as to constitute a terminal insulated by the cover from the material of the tank 10.
  • the other end of the rod 36 is reduced in diameter and held within an insulator bushing 42 pressed into the metal base plate 34.
  • the rod 38 is also held by the cover 18 and insulated from the tank to constitute a terminal as is the case with the rod 36, but in this case the rod 38 is fixed in conductive relation with the base plate 34.
  • the rod 40 is preferably made of glass filled nylon or plastic material and has its "ice upper end pressed into and concealed within the cover 18 and its lower end in a driving fit with the cover 34.
  • the rod 40 also carries a resistance 44 which is in the form of a coil of spaced convolutions of resistance wire. One end is held in conductive relation with the base plate 34 through a nickel silver ferrule 47. A second ferrule 48 is used at the other end of the rod 40 to anchor that end of the wire 44.
  • a disk 46 Integral with the conduit 32 is a disk 46 having a peripheral flange 46 and made integral with the conduit and such as to provide a surface for closure and support of a Saran mesh bag-like filter element 50 which is pinched or closed at its base 52.
  • the proportions are such that the element 50 just contacts the bottom of the tank 10.
  • a plastic float 54 which bears peripheral notches such as at 56 slidingly to receive the rods 36, 38 and 40.
  • the float 54 carries contact means 60 in the form of a spring ribbon in such a way that one end of the contact means 60 slidably engages the rod 36 and the other end engages the resistance 44.
  • the structure permits the choice of plastic material for the making of the conduit 32 and the cover 18. This is conducive to low cost and yet provides a very satisfactory structure for firmly guiding the float 54 and most satisfactorily support the filter element 50.
  • the rod 36 has its upper end spaced to form a terminal for connection to a gage 72 which is connected to a source of voltage such as battery 70.
  • the base plate 34 is in conductive relation with the rod 38 and the upper end of the latter presents an exterior terminal for connection to ground 74.
  • a suitable fuel gage is disclosed in United States Patent No. 2,883,623, granted April 21, 1959, in the names of H. R. Hastings and C. A. Haut. Numerous equivalent instruments would serve to give an indication of float level in accordance with a correct signal imparted by the tank sending unit herein disclosed.
  • the variation in the supply of liquid fuel in the tank 10 will cause the rising and falling of the float 54 and this will cause a variation of the current passing through the resistance 44 and influence the reading of the gage 72.
  • the circuit will proceed from the gage 72, down the rod 36 to the ribbon or contact means 60, along the latter to the resistance 44 and then to the base plate 34 and to the second metal rod 38 and then to ground 74.
  • the rod 38 is referred to as the second rod and the rod 36 as the one other rod.
  • gasoline When suction is applied by way of the inlet conduit 28 to the suction passage defined by the cover 18 and the conduit 32, gasoline will flow through the filter 50 and be suitably clarified simultaneously with the sending of the signal as to fluid level by the same unitary structure.
  • a liquid level sending unit comprising a first cover at one end adapted to be fixed to the top wall of a tank, a second cover spaced from said first cover, filtering means at the other end of said unit and supported by said second cover for submergence in said tank, a conduit on said first cover and defining a suction passage leading through both covers to said filtering means, multiple rods fixed to said covers and extending along a length portion of said conduit, a resistance element extending along one of said rods with one end of said element electrically connected to a second of said rods, a float movable along said length portion of said conduit and carrying contact means slidable on said resistance and one other of said rod-s, and terminals on said second and one other rods.
  • a liquid level sending unit comprising a cover adapted to be fixed to the wall of a tank and a filtering means for submergence in said tank, said cover and filtering means being connected by a central conduit and multiple rods spaced around the said conduit, the conduit defining a suction passage leading through the said cover, resistance means on one of said rods and having one end in electrically conductive relation with a second of said rods, a float slidable on said conduit, contact means on said float slidable on said resistance means and one other of said rods, and terminals on said second and one other rods.
  • a liquid level sending unit comprising a cover attachable to a tank and including a filtering unit supported in spaced relation on said cover by means of three rods and a conduit, said conduit and cover defining a suction passage leading from the interior of said filtering unit and through the cover, a resistance on one of said rods, said filtering unit including a metal plate in electrical conducting relation with one end of said resistance and a second of said rods, a float movable along said conduit and carrying contact means slidable on said resistance and one other of said rods, and terminals on said second and one other rods.
  • a liquid level sending unit comprising a plastic cover attachable to a tank and including a filtering unit fixed in spaced relation to said cover by means of multiple metal rods and a plastic conduit, said conduit and cover cooperating to define a suction passage leading from one side of said cover to the interior of said filtering unit on the other side of said cover, a resistance on one of said rods, one end of said resistance being connected to a second of said rods, a float movable along said conduit and rods, contact means carried by said float and slidable on said resistance and one other of said rods and terminals on said second and one other rods.
  • a liquid level sending unit comprising a cover attachable to a tank wall and including a base plate fixed in spaced relation to said cover by multiple rods and a central conduit, said rods and base plate cooperating in carrying a resistance whereby current may be conducted through the unit, a float movable on said conduit between said cover and base plate and carrying contact means slidable on said resistance to vary said current, and one end of said central conduit being open and terminatnig near said base plate.
  • a liquid level sending unit attachable to a tank wall and including a support and a metal base plate, multiple rods and a conduit connecting said support and base plate in spaced relation, a float slidable on said conduit and having grooves each in registry with one of said rods for guidance, a resistance on one of said rods and having one end connected to said base plate, a second of said rods having a terminal at one end and its other end in conductive relation with said base plate, contact means carried on said float and slidable on said resistance and one other of said rods, and a terminal on said one other rod.
  • a liquid level sending unit as set forth in claim 6 in which said support and conduit are made of plastic and which cooperate in defining a suction passage.
  • a liquid level sending unit as set forth in claim 6 including a bag-like filter element and in which said base plate and one end of said conduit form a closure for said bag-like filter element.

Description

g- 16, 1956 R. B. COLEMAN ETAL 3,266,312
LEVEL INDICATOR SENDING UNIT Filed Feb. 17, 1964 INVENTORS United States Patent 3,266,312 LEVEL INDICATOR SENDING UNIT Richard B. Coleman and Neal E. Neese, Lansing, Mich., assignors to General Motors Corporation, Detroit, Mich., a corporation of Delaware Filed Feb. 17, 1964, Ser. No. 345,413 8 Claims. (Cl. 73-313) This invention relates to liquid level indicators and more particularly to sending units suitable for use in liquid fuel tanks and by means of which signals may be imparted to liquid level indicators such as gages.
An object of the present invention is to provide a combined suction line and signal sending unit which is low in cost, convenient to install in a tank and such as to present a base readily receiving a filter element as a part of the unitand adapted to clarify fluid to be discharged from the tank.
, A feature of the invention is a combined suction line and sending unit having a cover or support for multiple rods and a conduit, the rods being utilized in conveying a signal current and cooperating with the conduit to guide a float. Another feature is a sending unit employing a resistance and having a conduit for guiding a float and a base forming a convenient attachment for filter means through which fluid may pass on its way to the conduit.
These and other important features of the invention will now be described in detail in the specification and then pointed out more particularly in the appended claims.
In the drawings:
FIGURE 1 is a side view of an automotive gasoline tank, a portion of which is broken away showing the installation of a sending unit representing one embodiment of the present invention;
FIGURE 2 is a view, drawn to a larger scale, of the sending unit shown in FIGURE 1 with portions of the sending unit broken away and a portion of the top wall of the tank shown in section;
FIGURE 3 is a view drawn partly in section as viewed in the direction of the arrows 33 in FIGURE 2;
FIGURE 4 is a sectional view looking in the direction of the arrows 44 in FIGURE 2; and
FIGURE 5 is a sectional view looking in the direction of the arrows 55 in FIGURE 2.
An automotive type fuel tank is shown at having a top wall 12 with a discharge opening therein shown at 14 as being reinforced by a stiffening ring 16. A support 18 is formed as a cover for the opening 14 and is so made as to be attachable to the tank by means of screws 20 with a sealing gasket 22 interposed. The cover 18 is preferably injection molded of plastic material in such a way as to include a right angle portion 24 defining a right angle suction passage. One side of the cover 18 is formed to constitute a tube-like projection or nipple 26 suitable for the attachment of a suction line such as indicated at 28. Depending from the main body of the cover 18 is a tube portion 30. A conduit 32 is pressed on the tube portion 30 so that the passage from the portion 24 is thereby extended downwardly a substantial distance and below a metal base plate 34. This base plate surrounds the conduit 32 and is joined to the cover 18 and in spaced relation with the latter by means of three rods 36, 38 and 40.
The rod 36 is retained at one end within the cover 18 in such a way as to constitute a terminal insulated by the cover from the material of the tank 10. The other end of the rod 36 is reduced in diameter and held within an insulator bushing 42 pressed into the metal base plate 34. The rod 38 is also held by the cover 18 and insulated from the tank to constitute a terminal as is the case with the rod 36, but in this case the rod 38 is fixed in conductive relation with the base plate 34. The rod 40 is preferably made of glass filled nylon or plastic material and has its "ice upper end pressed into and concealed within the cover 18 and its lower end in a driving fit with the cover 34. The rod 40 also carries a resistance 44 which is in the form of a coil of spaced convolutions of resistance wire. One end is held in conductive relation with the base plate 34 through a nickel silver ferrule 47. A second ferrule 48 is used at the other end of the rod 40 to anchor that end of the wire 44.
Integral with the conduit 32 is a disk 46 having a peripheral flange 46 and made integral with the conduit and such as to provide a surface for closure and support of a Saran mesh bag-like filter element 50 which is pinched or closed at its base 52. Preferably the proportions are such that the element 50 just contacts the bottom of the tank 10.
Slidable on the conduit 32 is a plastic float 54 which bears peripheral notches such as at 56 slidingly to receive the rods 36, 38 and 40. The float 54 carries contact means 60 in the form of a spring ribbon in such a way that one end of the contact means 60 slidably engages the rod 36 and the other end engages the resistance 44.
It will be noted that the structure permits the choice of plastic material for the making of the conduit 32 and the cover 18. This is conducive to low cost and yet provides a very satisfactory structure for firmly guiding the float 54 and most satisfactorily support the filter element 50.
The rod 36 has its upper end spaced to form a terminal for connection to a gage 72 which is connected to a source of voltage such as battery 70. The base plate 34 is in conductive relation with the rod 38 and the upper end of the latter presents an exterior terminal for connection to ground 74. A suitable fuel gage is disclosed in United States Patent No. 2,883,623, granted April 21, 1959, in the names of H. R. Hastings and C. A. Haut. Numerous equivalent instruments would serve to give an indication of float level in accordance with a correct signal imparted by the tank sending unit herein disclosed.
In the operation of the unit the variation in the supply of liquid fuel in the tank 10 will cause the rising and falling of the float 54 and this will cause a variation of the current passing through the resistance 44 and influence the reading of the gage 72. It will be understood that the circuit will proceed from the gage 72, down the rod 36 to the ribbon or contact means 60, along the latter to the resistance 44 and then to the base plate 34 and to the second metal rod 38 and then to ground 74. In the claims as set forth below, the rod 38 is referred to as the second rod and the rod 36 as the one other rod.
When suction is applied by way of the inlet conduit 28 to the suction passage defined by the cover 18 and the conduit 32, gasoline will flow through the filter 50 and be suitably clarified simultaneously with the sending of the signal as to fluid level by the same unitary structure.
We claim:
1. A liquid level sending unit comprising a first cover at one end adapted to be fixed to the top wall of a tank, a second cover spaced from said first cover, filtering means at the other end of said unit and supported by said second cover for submergence in said tank, a conduit on said first cover and defining a suction passage leading through both covers to said filtering means, multiple rods fixed to said covers and extending along a length portion of said conduit, a resistance element extending along one of said rods with one end of said element electrically connected to a second of said rods, a float movable along said length portion of said conduit and carrying contact means slidable on said resistance and one other of said rod-s, and terminals on said second and one other rods.
2. A liquid level sending unit comprising a cover adapted to be fixed to the wall of a tank and a filtering means for submergence in said tank, said cover and filtering means being connected by a central conduit and multiple rods spaced around the said conduit, the conduit defining a suction passage leading through the said cover, resistance means on one of said rods and having one end in electrically conductive relation with a second of said rods, a float slidable on said conduit, contact means on said float slidable on said resistance means and one other of said rods, and terminals on said second and one other rods.
3. A liquid level sending unit comprising a cover attachable to a tank and including a filtering unit supported in spaced relation on said cover by means of three rods and a conduit, said conduit and cover defining a suction passage leading from the interior of said filtering unit and through the cover, a resistance on one of said rods, said filtering unit including a metal plate in electrical conducting relation with one end of said resistance and a second of said rods, a float movable along said conduit and carrying contact means slidable on said resistance and one other of said rods, and terminals on said second and one other rods.
4. A liquid level sending unit comprising a plastic cover attachable to a tank and including a filtering unit fixed in spaced relation to said cover by means of multiple metal rods and a plastic conduit, said conduit and cover cooperating to define a suction passage leading from one side of said cover to the interior of said filtering unit on the other side of said cover, a resistance on one of said rods, one end of said resistance being connected to a second of said rods, a float movable along said conduit and rods, contact means carried by said float and slidable on said resistance and one other of said rods and terminals on said second and one other rods.
5. A liquid level sending unit comprising a cover attachable to a tank wall and including a base plate fixed in spaced relation to said cover by multiple rods and a central conduit, said rods and base plate cooperating in carrying a resistance whereby current may be conducted through the unit, a float movable on said conduit between said cover and base plate and carrying contact means slidable on said resistance to vary said current, and one end of said central conduit being open and terminatnig near said base plate.
6. A liquid level sending unit attachable to a tank wall and including a support and a metal base plate, multiple rods and a conduit connecting said support and base plate in spaced relation, a float slidable on said conduit and having grooves each in registry with one of said rods for guidance, a resistance on one of said rods and having one end connected to said base plate, a second of said rods having a terminal at one end and its other end in conductive relation with said base plate, contact means carried on said float and slidable on said resistance and one other of said rods, and a terminal on said one other rod.
7. A liquid level sending unit as set forth in claim 6 in which said support and conduit are made of plastic and which cooperate in defining a suction passage.
8. A liquid level sending unit as set forth in claim 6 including a bag-like filter element and in which said base plate and one end of said conduit form a closure for said bag-like filter element.
References Cited by the Examiner UNITED STATES PATENTS Re. 25,208 7/1962 Perkins 73-313 1,281,658 10/1918 Remy et al. 2,125,219 7/1938 Campbell 73-313 X 3,023,905 3/1962 McDougal et al 210-172 LOUIS R. PRINCE, Primary Examiner.
DAVID SCHONBERG, Examiner.
DONN MCGIEHAN, Assistant Examiner.

Claims (1)

1. A LIQUID LEVEL SENDING UNIT COMPRISING A FIRST COVER AT ONE END ADAPTED TO BE FIXED TO THE TOP WALL OF A TANK, A SECOND COVER SPACED FROM SAID FIRST COVER, FILTERING MEANS AT THE OTHER END OF SAID UNIT AND SUPPORTED BY SAID SECOND COVER FOR SUBMERGENCE IN SAID TANK, A CONDUIT ON SAID FIRST COVER AND DEFINING A SUCTION PASSAGE LEADING THROUGH BOTH COVERS TO SAID FILTERING MEANS, MULTIPLE RODS FIXED TO SAID COVERS AND EXTENDING ALONG A LENGTH PORTION OF SAID CONDUIT, A RESISTANCE ELEMENT EXTENDING ALONG ONE OF SAID RODS WITH ONE END OF SAID ELEMENT ELECTRICALLY CONNECTED TO A SECOND OF SAID RODS, A FLOAT MOVABLE ALONG SAID LENGTH PORTION OF SAID CONDUIT AND CARRYING CONTACT MEANS SLIDABLE ON SAID RESISTANCE AND ONE OTHER OF SAID RODS, AND TERMINALS ON SAID SECOND AND ONE OTHER RODS.
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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348413A (en) * 1964-12-10 1967-10-24 Gen Motors Corp Linear fuel level gauge means
US3417613A (en) * 1966-02-04 1968-12-24 Vdo Schindling Immersed tube level indicator in automotive vehicles
US3595267A (en) * 1969-03-17 1971-07-27 Wyandotte Chemicals Corp Liquid level control device
FR2108103A1 (en) * 1970-09-30 1972-05-12 Meca Ind Int
US3731805A (en) * 1971-08-13 1973-05-08 Gen Motors Corp One-tank safety fuel reserve
US4265114A (en) * 1979-10-15 1981-05-05 Nicholas Anderson Liquid level indicator for a reservoir
US4342224A (en) * 1978-11-09 1982-08-03 Nifco Inc. Housing unit for liquid gauge and strainer
US4714176A (en) * 1985-01-24 1987-12-22 Oce-Nederland B.V. Liquid supply reservoir
US4813282A (en) * 1986-12-09 1989-03-21 Veglia Borletti S.R.L. Vehicle fuel level sensor
US4920798A (en) * 1988-11-17 1990-05-01 Stewart Warner Instrument Corporation Liquid level sender with linear float
US5501102A (en) * 1993-11-24 1996-03-26 Rochester Gauges, Inc. Floatless gauge with resistive/conductive polymer
US5750021A (en) * 1996-11-26 1998-05-12 Liang; Chung-Ho Oil supply and return tube structure for oil tanks in cars and ships
US5812048A (en) * 1993-11-24 1998-09-22 Rochester Gauges, Inc. Linear positioning indicator
US5907273A (en) * 1993-11-24 1999-05-25 Rochester Gauges, Inc. Linear positioning indicator
US20110174071A1 (en) * 2008-07-03 2011-07-21 Ronny Ludwig Sensor housing cover and method for manufacturing such a sensor housing cover
US8372278B1 (en) * 2012-03-21 2013-02-12 GM Global Technology Operations LLC Liquid fuel strainer assembly
US20140231366A1 (en) * 2013-02-21 2014-08-21 Caterpillar Inc. System and Method for Filtering Fuel Within Fuel Tank

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT8253867V0 (en) * 1982-10-28 1982-10-28 Borletti Spa DIELECTRIC LIQUID LEVEL INDICATOR IN A TANK
WO2004013586A1 (en) * 2002-07-31 2004-02-12 Nippon Seiki Co., Ltd. Fuel tank cover body

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1281658A (en) * 1916-01-10 1918-10-15 Remy Brothers Company Liquid-gage.
US2125219A (en) * 1936-11-18 1938-07-26 Bruce H Campbell Rheostat for an electrical battery indicator
US3023905A (en) * 1959-10-23 1962-03-06 Gen Motors Corp Combined strainer and fuel tank "empty" signaling device
USRE25208E (en) * 1962-07-24 Oil gauge

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE25208E (en) * 1962-07-24 Oil gauge
US1281658A (en) * 1916-01-10 1918-10-15 Remy Brothers Company Liquid-gage.
US2125219A (en) * 1936-11-18 1938-07-26 Bruce H Campbell Rheostat for an electrical battery indicator
US3023905A (en) * 1959-10-23 1962-03-06 Gen Motors Corp Combined strainer and fuel tank "empty" signaling device

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3348413A (en) * 1964-12-10 1967-10-24 Gen Motors Corp Linear fuel level gauge means
US3417613A (en) * 1966-02-04 1968-12-24 Vdo Schindling Immersed tube level indicator in automotive vehicles
US3595267A (en) * 1969-03-17 1971-07-27 Wyandotte Chemicals Corp Liquid level control device
FR2108103A1 (en) * 1970-09-30 1972-05-12 Meca Ind Int
US3731805A (en) * 1971-08-13 1973-05-08 Gen Motors Corp One-tank safety fuel reserve
US4342224A (en) * 1978-11-09 1982-08-03 Nifco Inc. Housing unit for liquid gauge and strainer
US4265114A (en) * 1979-10-15 1981-05-05 Nicholas Anderson Liquid level indicator for a reservoir
US4714176A (en) * 1985-01-24 1987-12-22 Oce-Nederland B.V. Liquid supply reservoir
US4813282A (en) * 1986-12-09 1989-03-21 Veglia Borletti S.R.L. Vehicle fuel level sensor
AU624642B2 (en) * 1988-11-17 1992-06-18 Stewart Warner Corporation Liquid level sender with linear float
US4920798A (en) * 1988-11-17 1990-05-01 Stewart Warner Instrument Corporation Liquid level sender with linear float
US5501102A (en) * 1993-11-24 1996-03-26 Rochester Gauges, Inc. Floatless gauge with resistive/conductive polymer
US5603238A (en) * 1993-11-24 1997-02-18 Rochester Gauges, Inc. Floatless gauge with resistive/conductive polymer
US5626053A (en) * 1993-11-24 1997-05-06 Rochester Gauges, Inc. Floatless gauge with resistive/conductive polymer
US5812048A (en) * 1993-11-24 1998-09-22 Rochester Gauges, Inc. Linear positioning indicator
US5907273A (en) * 1993-11-24 1999-05-25 Rochester Gauges, Inc. Linear positioning indicator
US5750021A (en) * 1996-11-26 1998-05-12 Liang; Chung-Ho Oil supply and return tube structure for oil tanks in cars and ships
US20110174071A1 (en) * 2008-07-03 2011-07-21 Ronny Ludwig Sensor housing cover and method for manufacturing such a sensor housing cover
US8707783B2 (en) * 2008-07-03 2014-04-29 Robert Bosch Gmbh Sensor housing cover and method for manufacturing such a sensor housing cover
US8372278B1 (en) * 2012-03-21 2013-02-12 GM Global Technology Operations LLC Liquid fuel strainer assembly
US20140231366A1 (en) * 2013-02-21 2014-08-21 Caterpillar Inc. System and Method for Filtering Fuel Within Fuel Tank
US9486725B2 (en) * 2013-02-21 2016-11-08 Caterpillar Inc. System and method for filtering fuel within fuel tank

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