US2104233A - Blower - Google Patents

Description

Jan.4, 1938. w. H. LEINWEBER BLOWER .Lejhweber INVENTOR Filed July 30, 1936 5 BY H15 ATTORNEY.

Patented Jan. 4; 1938 7 UNITED STATES j PATENT OFFICE BLOWER. William-H. rainwater, Chicago, 111.

Application July 30, 1936, Serial No. 93,377

"2 Claims. -(c1. 230-119) This invention relatesto blowers. It is an object of'this invention to provide an improved blower which is relatively simple and inexpensive in construction, and eiiicient in use.

Another object of the present invention is to provide a blower particularly adapted for use in conjunction with ventilating and air conditioning apparatus, so constructed that it will circulate air at a greater velocity with less resistv ance than blowers heretofore made.

A further object of the present invention is to provide a blower for utilizing the air forced into the housing from the two sides to draw I additionalair into the housing, thus increasing the efliciency of the blower.

Other objects will appear hereinafter.

The invention consists of the novel combination and arrangementsof parts to be hereinafter described and claimed.

The invention will best be-understood by reference to the accompanying drawing in which Fig. 1 is a side elevational view of a preferred form of the new blower;

Fig. 2 is a vertical sectional view of the same as seen on line 2-2, Fig. 1;

Fig. 3 is an end elevational view as seen line 3 in Fig. 1; and 1 Fig. 4 is a fragmentary sectional view of a from modified form of the rim structure and annular ring structure shown in Fig. 2 of the preferred form of the new blower.

A preferred form of the new blower is illustrated in the drawing and comprises a body II) which includes a pair of impeller units in the form of a pair of hub structures II and I2 each of which have a plurality of arms I5 in the form' of fan blades extending radially therefrom and merging into rim portions I3 and I4 respectively. These rim portions I3 and I4 are fixed by means of screws I6 to a pair'of corresponding annular rings I1 and I8 which are disposed in spaced relation with respect to each other by a plurality of vanes I9 which are formed as anintegral part of the annular rings I1 and I8.

The vanes I9 extendparallel to the axis of the hubs II and I2 and havea concaved curvature on one side or face 20 thereof, these concaved sides or faces 20 ofthe vanes. I9 facing toward the leading edges 2I of the vanes I9; that is, fac- -The arms or impellerblades l5 extend from go the hub portion II, or I2, with the leading edge 25 disposed substantially away from the rim portion I301 I4 at the radial extremity of the blades I5 but having a supporting web 21 formed integrally therebetween; the trailing edge 26 at the radial extremity of the blades I {merging into the rim portion I3 or I4, as the case may be, thus leaving an open'space 28 between the blade and the rim I3 or I4 for a reason to be given presently.

In use the new blower may be mounted upon a drive shaft 30 shown in dotted lines (Fig. 2) which is supported by a pair of brackets 3| also shown in dotted lines. These brackets in turn are supported by a housing 32, likewise shown in dotted lines, which is open at both sides as at 33 and which has a duct portion 34 leading tangentially therefrom.

' It is to be noted that while the vanes I9 of the blower are contained'within the housing 32, the

' impeller blades I5 may extend through .the side openings 33 formed in the housing 32 and that the openings 28 formed at the radial extremity of each of the blades I5 are substantially outside thehousing 32.

In the-operation of the blower (clockwise as seen in Fig. 1) air is drawn into the housing 32 by the impeller blades I5, the cups 23 impelling air over the concave curvature or face 24 of the the face 24 sets upa vacuum in the region of the openings 28 and draws air therethrough from a direction at an angle to the axis of the hubs I I and- I2 (as indicated by the arrows, Fig. 2),

thereby gaining a greater supply of air for the blower unit. The air thus drawn in from both sides of the housing 32 is swished within the latter by the vanes I 9, the concave faces 20 of which force the air centrifugally from the axis of the hub structure and out through the duct 34.

Referring to, Fig. 4, I3 and I4 illustrate a modification of the rim portions I3 and I4 of the dvicesh'own in Figs; 1, 2 and 3; similarly, n' and I8 illustrate a corresponding. modification .of the annular rings I1 and I8 of the same.

noted the latter are funnel shaped and thereby blades I5. The velocity of the air'moving along increase the intakeof air into the blower unit at -a minimum of resistance and likewise increase .the efficiency of the new-blower unit.

Other parts illustrated in Fig. 4' corresponding to the respective 'parts of the illustration in Fig.

2, are given primed numerals which correspond showing.

While I have illustrated and described the pre-' with. the ordinary numerals of the: Preferred variations and modifications as come within the scope of the appended claims.

Having thus described my invention, what I claim as new and desire to protect by Letters Patent is:

1. A blower comprising a pair of air impellers each having a hub member aligned co-axially with the other and each having, blade members attached to their respective hub members and having formations extended axially in advance of said hub member, each said impeller having an annulus extended'around and attached to the radial extremities of said blades, each of said blades having an opening adjacent its said radial extremity, and a plurality of vanes arranged .around the common axis of said hubs between the respective annular parts of said impellers.

2. A blower including a pair of spaced oppositely disposed air impellers each having hub portions and each having blades with a pocketlike formation extendedaxially in advance of the hub portion thereof for engaging air in a region closely adjacent said hub, each said impeller having a ring-like member joining the radial ends of said blades, and each of the latter having an opening in the radial extremity thereof adjacent said ring member, and a plurality of blades arranged in spaced relation around said hub portions and secured to said ring-like members of each of said impellers.

3. In a blower comprising a body including a pair of impeller units each including a hub structure, a plurality of impeller blades radially arranged about and'integral with the hub structure, said impeller blades having a leading edge and a trailing edge, said trailing edge merging at the radial extremity of said impeller blade with a rim, and said leading edge disposed sub- .stantially laterally from said rim to form an opening between the latter and the radial extremity of said blade, said pair of impeller units being disposed in spaced relation with respect to each other by a plurality of vanes extending between the rims of said impeller units and having their axis extending substantially parallel relative to each other and the axis of said'hub strucures.

a. In a blower comprising a body including a.

.pair of impeller units each including a hub structure, a plurality of impeller blades radially arranged about and integral with the hub structure, said impeller blades having a leading edge and a trailing edge, said trailing edge merging at the radial extremity of said impeller blade with a rim, and said leading edge disposed substantially laterally from said rim to form an opening between the latter and the radial extremity of said blade, said pair of impeller units being disposed in spaced relation with respect to each other by a plurality of vanes extending between the rims of said impeller units and having their axis extending substantially parallel relative to each other and the axis of said hub structure, whereby when said blower is in use air will be directedby said impeller blades between said impeller units and will be directed by the vanes tangentially from the radially outer ends of the latter.

5. In a blower comprising a body including a pair of impeller units each including a hub.structure, a plurality of impeller blades radially arranged about and integral with the hub structure, said impeller blades having a leading edge and a trailing edge, said trailing edge merging at the radial extremity of said impeller blade with a rim, and said leading edge disposed substantially laterally from said rim to form an opening between the latter and the radial extremity of said blade, said body including a pair of annular rings having a plurality of vanes arranged therebetween and integrally therewith, each of said annular rings having one of said impeller units fixed thereto at the outer side thereof with respec to the vanes, said vanes having their axis extending substantially parallel relative to each other and the axis of said hub structure, whereby when said blower is in use air will be directed by said impeller blades between said impeller units and will be directed by the vanes tangentially from the radially outer ends of the latter.

6. In a blower comprising a body including a pair of impeller units each including a hub structure, a plurality of impeller blades radially arranged about and integral with the hub structure, said impeller blades having a leading edge and a trailing edge, said trailing edge merging at the radial extremity of said impeller blade with a rim, and said leading edge disposed substantially laterally from said rim to form an opening between the latter and the radial extremity of said blade, said body including a pair of annular rings having a plurality of vanes arranged therebetween and integrally therewith, each of said annular rings having one of said impeller units fixed thereto at the outer side' thereof with respect to the vanes, said vanes having their axis extending substantially parallel relative to each other and the axis of said hub structure, whereby when said blower is in use air will be directed by said impeller blades to a point between said impeller units and will be directed by the vanes tangentially from the radially outer ends of the latter thereby drawing additional air through the opening formed between the radial extremity of the impeller blade and the rim to a point between said impeller units.

'7. In a blower comprising a body including a pair of impeller units each including a hub' structure, a plurality of impeller blades radially arranged about and integral with the hub structure, said impeller blades having a leading edge and a trailing edge, said trailing edge merging at the radial extremity-of said impeller blade with a rim, and said leading edge disposed substantially laterally from said rim to form an opening between the latter and the radial extremity of said blade, said body including a pair of annular rings having a plurality of vanes arranged therebetween and integrally therewith, each of said annular rings having one of said impeller units fixed thereto at the outer side there- WILLIAM H. LEINWIBER.

of with respect to the vanes, said vanes having

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