US3845947A - Surgical operation tables - Google Patents

Surgical operation tables Download PDF

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Publication number
US3845947A
US3845947A US00365467A US36546773A US3845947A US 3845947 A US3845947 A US 3845947A US 00365467 A US00365467 A US 00365467A US 36546773 A US36546773 A US 36546773A US 3845947 A US3845947 A US 3845947A
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extension section
clamping
section
stays
locking
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US00365467A
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N Lee
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Smiths Group PLC
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N Lee
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/104—Adaptations for table mobility, e.g. arrangement of wheels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G13/00—Operating tables; Auxiliary appliances therefor
    • A61G13/10—Parts, details or accessories
    • A61G13/12—Rests specially adapted therefor; Arrangements of patient-supporting surfaces
    • A61G13/128—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with mechanical surface adaptations
    • A61G13/129—Rests specially adapted therefor; Arrangements of patient-supporting surfaces with mechanical surface adaptations having surface parts for adaptation of the size, e.g. for extension or reduction

Definitions

  • a surgical operation table has a patient-supporting 1 table top including a main section and an extension [52] US. Cl. 269/324 section.
  • the extension section is slidablc lengthwise of [51] Int. Cl A61g 13/00 the table top between an extended position in which it [58] Field of Search 269/322-325, extends the length of the table top and a retracted po- 269/328; 297/430-436; 5/66, 67 sition in which it lies beneath the main section
  • the 7 extension section (fan be releasably locked in its ex- [56] References Cited tended position.
  • FIG. 3 is a partly exploded perspective view Surgical operation tables with a patient-supporting top having a main section and an extension section are known. An objectof the present invention is to provide an improved such table.
  • FIG. 1 is an elevation of a surgical operation table according to the invention
  • FIG. 2 is an elevation of the top portion of the same table, but illustrating an extension section in an alternative position, I illustrating the construction of the extension section,
  • FIG. 4 is a sectional view of a clamping mechanism associated with the extension section and
  • FIG. is a' detail view of another modification.
  • a surgical operation table comprises a patient-supporting platform or table top T which is mounted in 'a heightadjustable-manner on a suitable base 1.
  • This base may be fixed or it may (as shown in FIG. 1) be mounted on wheels or castors.
  • Thetable top has a main section 2 arranged to support the body of the patient and a separate head section 3 which is arrangedat one end of the main section in such a way that the angular position of the head section with respect to the main section may be adjusted as desired.
  • An extension section 4 is arranged at the other end of the main section 2 to support the'legs of the patient. The angular position of this extension or leg section with respect to the main section may also be adjusted as desired.
  • All of the various sections are preferably constructedof a metal frame which supports sheets 5 of X-ray translucent material on which a mattress or mattresses can be placed. In FIG.
  • the extension section 4 is shown with its translucent I the main section. This will improve the image intensifier qualities of the table as there will then be no double thickness of material between the patient and the intensifier equipment.
  • the metal frame of the extension section 4 includes a carriage portion 6 and a swinging portion 7 which is pivotally mounted on the carriage 6.
  • This carriage 6 is provided with slide bars 8, conveniently of brass, which can run .in acomplementary slide channel 9, conveniently of steel, inside the metal frame of the main section 2.
  • the slide bars at the righthand side of FIG. 3 are not shown in the interests of clarity.
  • the carriage 6 is at all times beneath the main section 2 as the entire patient-supporting surface of the extension section is on the swinging portion 7.
  • runners on the extension section could run in ball-bearing tracks in the main section or runners made of, or coated with.
  • a suitable lowfriction material could run in suitable tracks in the main section.
  • a locking mechanism for retaining the extension section 4 in its extended position is provided on each side of the extension section.
  • This locking mechanism is illustrated in FIG. 3, in which Figure some parts have been omitted for the sake of clarity.
  • These locking mechanisms are mirror images of one another.
  • Each locking mechanism comprises a locking plate 10 (only one. of which is visible in the drawings) pivotally mounted at one'side of the carriage 6 of the extension section 4.
  • This locking plate 10 has a locking recess 11 which has. a leadfin opening facing the direction of movement of the extension section to its extended position.
  • a co-operating locking pin 12 is provided on the frame of the main section 2 in such a position that when the extension section is fully extended, the pin 12 is engaged in the locking recess 11 as shown at the right of FIG. 3.
  • the locking recess 11 is so shaped and the pivot 13 of the locking plate 10 is so positioned that once the locking pin 12 is engaged in the locking recess 11 it cannot be disengaged unless and until the locking plate 10 is turned to a release direction by operation of a release mechanism.
  • Each locking plate 10 has its own release mechanism.
  • Each of these mechanisms comprises a push-rod 14 (only one of which is visible in the drawings) extending the length of the extension section and terminating in a release knob 15 extending from the end of the extension section.
  • This push rod 14 is axially slidable and can be displaced towards the main section against the action of the loading of a spring 16 to release the locking pin.
  • the push rod 14 carries a release plate 17 which can bear on a release pin 18 on the locking plate 10.
  • This release pin 18 is freely located in an aperture 19 in the carriage frame 6 of the extension section which aperture 19 is of sufficient size to permit the locking plate 10 to berotated about its pivot 13 by an amount sufficient to release the locking pin 12.
  • the swinging portion 7 of the extension section 4 is pivotably mounted on the carriage portion 6 and can be retained in the horizontal position or any desired angular position, by a clamping mechanism shown in FIG. 4.
  • the section includes stays 20 arranged at each side of the extension section 4 extending lengthwise of the section, and pivotally mounted as at 18a on the carriage 6. These stays 20 run through openings in a metal tube 21, extending transversely across the free end of the extension section 4.
  • a clamp rod 22 extends through this tube and has at each end cylindrical clamp pads 23, conveniently of brassor nylon. Each of clamp members 23 at one end of the clamp rod 22 bears against one of the stays 20. The clamp member at the other end of the clamp rod bears against the other stay 20.
  • a clamp handle 24 projected from one side of the extension section 4 is rotatable to rotate a clamp screw 22 into contact with the one of the stays.
  • the clamp screw is tightened against the adjacent stay and that stay is displaced in such a direction that the clamp rod and the two clamp members are compressed between the two stays. This causes the two clamp members to prevent relative movement between the clamp members and the stays thereby to retain the extension section in its desired angular position.
  • FIG. 5 shows a modification of the extension section 4 in which the removable patient supporting surface of the section has an overhanging portion giving an increased length to the table.
  • a section is useful in operations where a patient has to be placed in the lithotomy position as it enables the patient to be correctly positioned at the beginning of the operation and it also increases the length of the portion of the table beneath which image intensification equipment can be arranged.
  • a surgical examination or operation table comprising a patient-supporting table top includinga main section and an extension section, the extension section being slidable lengthwise of the table top between an extended position lengthwise of the table top and a retracted position below the main section, means for releasably locking the extension section in its extended position, the extension section including a carriage portion provided with slide members, complementary slide channels beneath the main section within which the slides are engaged, a swinging portion pivotally mounted on the carriage portion, clamping means for selectively maintaining the swinging portion in a horizontal position or an angular position with respect to the carriage portion, and means at each side of the table top comprising a locking plate pivotally mounted on the extension section and having a locking recess with a lead-in opening facing the direction of movement of the extension section, a co-operating locking pin mounted on the main section in position engageable in the locking recess when the extension section is fully extended, and a spring-loaded push-rod extending lengthwise of the table and being axially moveable against the loading of
  • a table as claimed in claim 1 including stays pivotally mounted on the carriage portion and extending lengthwise beneath the swinging portion, a clamping member carried by the swinging portion and extending transversely thereof, said clamping member having openings in which the stays are slidable, clamping pads inside the clamping member, and a handle at one side of the table, the said handle being rotatable to move the clamping pads into clamping engagement with the stays.
  • clamping member is a tube extending transversely of the extension section and having openings in which the stays are slidable, a pair of cylindrical clamping pads arranged in the tube, one in contact with each stay, a clamp rod extending between the clamping pads, and a clamp screw rotatable by rotation of the handle so as to move into engagement with one of the stays whereby the stays, clamping pads and clamp rod are compressed into clamping engagement with one another.

Abstract

A surgical operation table has a patient-supporting table top including a main section and an extension section. The extension section is slidable lengthwise of the table top between an extended position in which it extends the length of the table top and a retracted position in which it lies beneath the main section. The extension section can be releasably locked in its extended position.

Description

nited States Patent [1 1 Lee 1 1 Nov. 5, 1974 [54] SURGICAL OPERATION TABLES 2,552,370 5/1951 Curtis 269/328 2,605,151 7 1952 Sh' [75] Inventor: Norma" John London England 2,606,801 8/1952 269/324 [73] A ig M tb (H ldi L d 3,478,372 1 1/1969 Benoit et a1. 5/66 X London, England Primary Exa minerRoy Lake [22] Flled' May 1973 Assistant Examiner-Neil Abrams [21] A 1 NO 365,467 Attorney, Agent, or Firm-Wi11iam R. Lihcrman, Esq.
[30] Foreign Application Priority Data [57] ABSTRACT June 7, 1972 Great Britain 26535/72 A surgical operation table has a patient-supporting 1 table top including a main section and an extension [52] US. Cl. 269/324 section. The extension section is slidablc lengthwise of [51] Int. Cl A61g 13/00 the table top between an extended position in which it [58] Field of Search 269/322-325, extends the length of the table top and a retracted po- 269/328; 297/430-436; 5/66, 67 sition in which it lies beneath the main section The 7 extension section (fan be releasably locked in its ex- [56] References Cited tended position.
UNITED STATES PATENTS 3 Claims, 5 Drawing Figures 2,247,720 7/1941 Wonderly 297/430 X PATENTEBNBY slam 33451947 SHEET 3 OF 3 I FIG. 3 is a partly exploded perspective view Surgical operation tables with a patient-supporting top having a main section and an extension section are known. An objectof the present invention is to provide an improved such table.
BRIEF DESCRIPTION OF'THE DRAWINGS FIG. 1 is an elevation of a surgical operation table according to the invention,
FIG. 2 is an elevation of the top portion of the same table, but illustrating an extension section in an alternative position, I illustrating the construction of the extension section,
FIG. 4 is a sectional view of a clamping mechanism associated with the extension section and,
FIG. is a' detail view of another modification.
DESCRIPTION OF A PREFERRED EMBODIMENT In the illustrated embodiment of the invention, a surgical operation table comprises a patient-supporting platform or table top T which is mounted in 'a heightadjustable-manner on a suitable base 1. This base may be fixed or it may (as shown in FIG. 1) be mounted on wheels or castors. Thetable top has a main section 2 arranged to support the body of the patient and a separate head section 3 which is arrangedat one end of the main section in such a way that the angular position of the head section with respect to the main section may be adjusted as desired. An extension section 4 is arranged at the other end of the main section 2 to support the'legs of the patient. The angular position of this extension or leg section with respect to the main section may also be adjusted as desired. All of the various sections are preferably constructedof a metal frame which supports sheets 5 of X-ray translucent material on which a mattress or mattresses can be placed. In FIG.
1, the extension section 4 is shown with its translucent I the main section. This will improve the image intensifier qualities of the table as there will then be no double thickness of material between the patient and the intensifier equipment.
The metal frame of the extension section 4 includes a carriage portion 6 and a swinging portion 7 which is pivotally mounted on the carriage 6. This carriage 6 is provided with slide bars 8, conveniently of brass, which can run .in acomplementary slide channel 9, conveniently of steel, inside the metal frame of the main section 2. The slide bars at the righthand side of FIG. 3 are not shown in the interests of clarity. The carriage 6 is at all times beneath the main section 2 as the entire patient-supporting surface of the extension section is on the swinging portion 7.
Obviously, many alternative slide arrangements could be used. For example, runners on the extension section could run in ball-bearing tracks in the main section or runners made of, or coated with. a suitable lowfriction material could run in suitable tracks in the main section. I
A locking mechanism for retaining the extension section 4 in its extended position is provided on each side of the extension section. This locking mechanism is illustrated in FIG. 3, in which Figure some parts have been omitted for the sake of clarity. These locking mechanisms are mirror images of one another. Each locking mechanism comprises a locking plate 10 (only one. of which is visible in the drawings) pivotally mounted at one'side of the carriage 6 of the extension section 4. This locking plate 10 has a locking recess 11 which has. a leadfin opening facing the direction of movement of the extension section to its extended position. A co-operating locking pin 12 is provided on the frame of the main section 2 in such a position that when the extension section is fully extended, the pin 12 is engaged in the locking recess 11 as shown at the right of FIG. 3. The locking recess 11 is so shaped and the pivot 13 of the locking plate 10 is so positioned that once the locking pin 12 is engaged in the locking recess 11 it cannot be disengaged unless and until the locking plate 10 is turned to a release direction by operation of a release mechanism.
Each locking plate 10 has its own release mechanism. Each of these mechanisms comprises a push-rod 14 (only one of which is visible in the drawings) extending the length of the extension section and terminating in a release knob 15 extending from the end of the extension section. This push rod 14 is axially slidable and can be displaced towards the main section against the action of the loading of a spring 16 to release the locking pin. The push rod 14 carries a release plate 17 which can bear on a release pin 18 on the locking plate 10. This release pin 18 is freely located in an aperture 19 in the carriage frame 6 of the extension section which aperture 19 is of sufficient size to permit the locking plate 10 to berotated about its pivot 13 by an amount sufficient to release the locking pin 12.
The swinging portion 7 of the extension section 4 is pivotably mounted on the carriage portion 6 and can be retained in the horizontal position or any desired angular position, by a clamping mechanism shown in FIG. 4. The section includes stays 20 arranged at each side of the extension section 4 extending lengthwise of the section, and pivotally mounted as at 18a on the carriage 6. These stays 20 run through openings in a metal tube 21, extending transversely across the free end of the extension section 4. A clamp rod 22 extends through this tube and has at each end cylindrical clamp pads 23, conveniently of brassor nylon. Each of clamp members 23 at one end of the clamp rod 22 bears against one of the stays 20. The clamp member at the other end of the clamp rod bears against the other stay 20.
A clamp handle 24 projected from one side of the extension section 4 is rotatable to rotate a clamp screw 22 into contact with the one of the stays. By rotation of the clamp handle 24, the clamp screw is tightened against the adjacent stay and that stay is displaced in such a direction that the clamp rod and the two clamp members are compressed between the two stays. This causes the two clamp members to prevent relative movement between the clamp members and the stays thereby to retain the extension section in its desired angular position.
FIG. 5 shows a modification of the extension section 4 in which the removable patient supporting surface of the section has an overhanging portion giving an increased length to the table. Such a section is useful in operations where a patient has to be placed in the lithotomy position as it enables the patient to be correctly positioned at the beginning of the operation and it also increases the length of the portion of the table beneath which image intensification equipment can be arranged.
What is claimed is:
l. A surgical examination or operation table comprising a patient-supporting table top includinga main section and an extension section, the extension section being slidable lengthwise of the table top between an extended position lengthwise of the table top and a retracted position below the main section, means for releasably locking the extension section in its extended position, the extension section including a carriage portion provided with slide members, complementary slide channels beneath the main section within which the slides are engaged, a swinging portion pivotally mounted on the carriage portion, clamping means for selectively maintaining the swinging portion in a horizontal position or an angular position with respect to the carriage portion, and means at each side of the table top comprising a locking plate pivotally mounted on the extension section and having a locking recess with a lead-in opening facing the direction of movement of the extension section, a co-operating locking pin mounted on the main section in position engageable in the locking recess when the extension section is fully extended, and a spring-loaded push-rod extending lengthwise of the table and being axially moveable against the loading of the spring, whereby to pivot the locking plate and release it from engagement with the locking pin for movement of the extension section selectively into the retracted position or any intermediate position.
2. A table as claimed in claim 1 including stays pivotally mounted on the carriage portion and extending lengthwise beneath the swinging portion, a clamping member carried by the swinging portion and extending transversely thereof, said clamping member having openings in which the stays are slidable, clamping pads inside the clamping member, and a handle at one side of the table, the said handle being rotatable to move the clamping pads into clamping engagement with the stays.
3. A table as claimed in claim 2, wherein the clamping member is a tube extending transversely of the extension section and having openings in which the stays are slidable, a pair of cylindrical clamping pads arranged in the tube, one in contact with each stay, a clamp rod extending between the clamping pads, and a clamp screw rotatable by rotation of the handle so as to move into engagement with one of the stays whereby the stays, clamping pads and clamp rod are compressed into clamping engagement with one another.

Claims (3)

1. A surgical examination or operation table comprising a patient-supporting table top including a main section and an extension section, the extension section being slidable lengthwise of the table top between an extended position lengthwise of the table top and a retracted position below the main section, means for releasably locking the extension section in its extended position, the extension section including a carriage portion provided with slide members, complementary slide channels beneath the main section within which the slides are engaged, a swinging portion pivotally mounted on the carriage portion, clamping means for selectively maintaining the swinging portion in a horizontal position or an angular position with respect to the carriage portion, and means at each side of the table top comprising a locking plate pivotally mounted on the extension section and having a locking recess with a lead-in opening facing the direction of movement of the extension section, a co-operating locking pin mounted on the main section in position engageable in the locking recess when the extension section is fully extended, and a spring-loaded push-rod extending lengthwise of the table and being axially moveable against the loading of the spring, whereby to pivot the locking plate and release it from engagement with the locking pin for movement of the extension section selectively into the retracted position or any intermediate position.
2. A table as claimed in claim 1 including stays pivotally mounted on the carriage portion and extending lengthwise beneath the swinging portion, a clamping member carried by the swinging portion and extending transversely thereof, said clamping member having openings in which the stays are slidable, clamping pads inside the clamping member, and a handle at one side of the table, the said handle being rotatable to move the clamping pads into clamping engagement with the stays.
3. A table as claimed in claim 2, wherein the clamping member is a tube extending transversely of the extension section and having openings in which the stays are slidable, a pair of cylindrical clamping pads arranged in the tube, one in contact with each stay, a clamp rod extending between the clamping pads, and a clamp screw rotatable by rotation of the handle so as to move into engagement with one of the stays whereby the stays, clamping pads and clamp rod are compressed into clamping engagement with one another.
US00365467A 1972-06-07 1973-05-31 Surgical operation tables Expired - Lifetime US3845947A (en)

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GB2653572A GB1436548A (en) 1972-06-07 1972-06-07 Surgical operation tables

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CA (1) CA1000775A (en)
CH (1) CH558174A (en)
DE (1) DE2327028C2 (en)
FR (1) FR2187281B1 (en)
GB (1) GB1436548A (en)
IT (1) IT985282B (en)
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Cited By (18)

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US4847929A (en) * 1986-12-02 1989-07-18 Milenko Pupovic Bed with adjustable positions
US5572569A (en) * 1995-03-31 1996-11-05 Beta Medical Products Tilting imaging table
WO1999015126A3 (en) * 1997-09-23 1999-07-08 Hill Rom Co Inc Hospital bed having a retracting foot section
US6611979B2 (en) 1997-09-23 2003-09-02 Hill-Rom Services, Inc. Mattress having a retractable foot section
US6615429B2 (en) 1999-07-30 2003-09-09 Hill-Rom Services, Inc. Apparatus for positioning a patient-support deck
US6739006B2 (en) 1997-11-07 2004-05-25 Hill-Rom Services, Inc. Head section support for a surgical table apparatus
US6754923B2 (en) 1997-11-07 2004-06-29 Hill-Rom Services, Inc. Leg section support for a surgical table
US20050005356A1 (en) * 2002-08-20 2005-01-13 Nick Zacharopoulos Radiotherapy treatment and imaging patient support table
US6886200B2 (en) 2001-01-25 2005-05-03 Hill-Rom Services, Inc. Hydraulic actuator apparatus for a surgical table
US20070003022A1 (en) * 2005-06-29 2007-01-04 Siemens Aktiengesellschaft Patient table for an X-ray system
US7296312B2 (en) 2002-09-06 2007-11-20 Hill-Rom Services, Inc. Hospital bed
US20080201850A1 (en) * 2007-02-28 2008-08-28 Jorge A. Brito Positioning platform for prone breast imaging
US20100050343A1 (en) * 2008-08-29 2010-03-04 Hornbach David W Patient-support apparatus with movable top
US8104122B2 (en) 2005-12-19 2012-01-31 Hill-Rom Services, Inc. Patient support having an extendable foot section
USRE43155E1 (en) * 1995-01-03 2012-02-07 Hill-Rom Services, Inc. Hospital bed and mattress having a retractable foot section
US8286282B2 (en) 1995-08-04 2012-10-16 Hill-Rom Services, Inc. Bed frame and mattress synchronous control
CN104353134A (en) * 2014-10-28 2015-02-18 浙江舒友仪器设备有限公司 Method for fixing aspirator connecting tube in operating room
US9089459B2 (en) 2013-11-18 2015-07-28 Völker GmbH Person support apparatus

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Cited By (39)

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Publication number Priority date Publication date Assignee Title
US4847929A (en) * 1986-12-02 1989-07-18 Milenko Pupovic Bed with adjustable positions
US6212714B1 (en) 1995-01-03 2001-04-10 Hill-Rom, Inc. Hospital bed and mattress having a retracting foot section
US7000272B2 (en) 1995-01-03 2006-02-21 Hill-Rom Services, Inc. Hospital bed and mattress having a retractable foot section
US6496993B2 (en) 1995-01-03 2002-12-24 Hill-Rom Services, Inc. Hospital bed and mattress having a retracting foot section
US6684427B2 (en) 1995-01-03 2004-02-03 Hill-Rom Services, Inc. Hospital bed and matress having a retractable foot section
USRE43155E1 (en) * 1995-01-03 2012-02-07 Hill-Rom Services, Inc. Hospital bed and mattress having a retractable foot section
US7523515B2 (en) 1995-01-03 2009-04-28 Hill-Rom Services, Inc. Hospital bed and mattress having a retractable foot section
US20040221391A1 (en) * 1995-01-03 2004-11-11 Allen E. David Hospital bed and matress having a retractable foot section
US7216384B2 (en) 1995-01-03 2007-05-15 Hill-Rom Services, Inc. Hospital bed and mattress having a retractable foot section
US5572569A (en) * 1995-03-31 1996-11-05 Beta Medical Products Tilting imaging table
US8286282B2 (en) 1995-08-04 2012-10-16 Hill-Rom Services, Inc. Bed frame and mattress synchronous control
WO1999015126A3 (en) * 1997-09-23 1999-07-08 Hill Rom Co Inc Hospital bed having a retracting foot section
US6611979B2 (en) 1997-09-23 2003-09-02 Hill-Rom Services, Inc. Mattress having a retractable foot section
US6739006B2 (en) 1997-11-07 2004-05-25 Hill-Rom Services, Inc. Head section support for a surgical table apparatus
US6754923B2 (en) 1997-11-07 2004-06-29 Hill-Rom Services, Inc. Leg section support for a surgical table
US6615429B2 (en) 1999-07-30 2003-09-09 Hill-Rom Services, Inc. Apparatus for positioning a patient-support deck
US6880189B2 (en) 1999-12-29 2005-04-19 Hill-Rom Services, Inc. Patient support
US10251797B2 (en) 1999-12-29 2019-04-09 Hill-Rom Services, Inc. Hospital bed
US9009893B2 (en) 1999-12-29 2015-04-21 Hill-Rom Services, Inc. Hospital bed
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Also Published As

Publication number Publication date
DE2327028A1 (en) 1973-12-20
AU473084B2 (en) 1976-06-10
JPS4956490A (en) 1974-05-31
ZA733511B (en) 1974-04-24
FR2187281B1 (en) 1977-04-29
DE2327028C2 (en) 1982-02-18
CH558174A (en) 1975-01-31
GB1436548A (en) 1976-05-19
SE390483B (en) 1976-12-27
IT985282B (en) 1974-11-30
NL7307644A (en) 1973-12-11
FR2187281A1 (en) 1974-01-18
BE800060A (en) 1973-09-17
CA1000775A (en) 1976-11-30
AU5668873A (en) 1974-12-12

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