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Publication numberUS3754787 A
Publication typeGrant
Publication dateAug 28, 1973
Filing dateDec 2, 1971
Priority dateDec 2, 1971
Publication numberUS 3754787 A, US 3754787A, US-A-3754787, US3754787 A, US3754787A
InventorsW Garber
Original AssigneeW Garber
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Operating support for surgeons
US 3754787 A
Abstract
Operating room equipment is provided for supporting the body, feet and chest of a surgeon while operating. The support is adjustable to satisfy individual needs and preferences and does not interfere with the freedom of the surgeon's hand and arm movements. The support is preferably releasably secured adjacent an operating table and may be provided with means for illuminating the operating field.
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Description  (OCR text may contain errors)

United States Patent Garber 1 OPERATING SUPPORT FOR SURGEONS [76] Inventor: William Wilson Garber, 6501 Hagueman Dr., Richmond, Va. I 23225 221 Filed: Dec. 2, 1971 [211 App]. No.: 203,980

[52] U.S. Cl 297/390, 297/217, 297/345,

297/437 [51] Int. Cl A47c 7/62 [58] Field of Search 297/423, 195, 217,

[ Aug. 28, 1973 1,113,833 10/1914 Ruff 297/305 Primary Examiner-James T. McCall Attorney-Harold L. Stowell et a1.

[57] ABSTRACT Operating room equipment is provided for supporting the body, feet and chest of a surgeon while operating. The support is adjustable to satisfy individual needs and preferences and does not interfere with the freedom of the surgeons hand and arm movements. The support is preferably releasably secured adjacent an operating table and may be provided with means for illuminating the operating field.

6 Claims, 12 Drawing Figures [56] References Cited UNITED STATES PATENTS 3,029,106 4/1962 McGuire 297/217 3,037,570 6/1962 Olson 297/423 X 341,748 5/1886 Haynes 297/437 X 3,093,356 6/1963 Buyalos, .lr.... 248/206 R 1,275,739 8/1918 Pitti 297/273 X 454,100 6/1891 Wilson 297/411 Patented Aug. 28, 1973 4 Sheets-Sheet :3

Patented Aug. 28, 1973 4 Sheets-$heet 5 I l I FIG.|O

Patented Aug. 28, 1973 4 Sheets-Sheet 4 OPERATING SUPPORT FOR SURGEONS BACKGROUND OF THE INVENTION This invention relates to surgical operating room equipment and more particularly to an operating support for surgeons.

Surgical practice is such that operating room equipment and its arrangement varies greatly depending on the particular surgical procedure and individual needs and preferences. Flexibility in positioning items of equipment is highly desirable and is one reason that operating tables mounted on casters are generally preferred to those having a fixed base. Although personnel may be variously disposed around the operating table, the anesthetist is invariably seated on a stool at the head of the table. At times the surgeon will sit on a stool, for instance in vaginal operations or during protracted hand surgery. However, during many procedures of long duration, the surgeon is compelled to stand simply because he cannot properly position himself relative to the operating field while seated on a stool. Although operating room I accommodations should not be excessive, at the present time there is no satisfactory and practical way of physically supporting the surgeon that would be useful in a wide variety of operations. However, if the surgeon could sit and be otherwise supported while operating, he would experience less fatigue and function more smoothly.

The discomfort of surgeons and dentists during individual or collective procedures that necessitate their standing for long periods of time is a recognized prob lem and the prior art shows that some effort has been made to solve it. For example, there has been proposed a surgeon's operating chair having a body-contacting member against which the surgeon leans while operating, and there is a chest-supporting device against which a dentist can lean while working over a reclining patient. It may be noted that a presently available stool with a novel revolving back is finding increasing acceptance among dentists. However, since surgeons still find it routinely necessary to stand while operating and resort to standing on hazardous foot-stools toelevate themselves, it is obvious that the problem of providing a practical support for surgeons remains unsolved.

OBJECTS OF THE INVENTION With the foregoing and other considerations in mind, it is the primary object of the present invention to provide an operating support for surgeons that can be used in most operations to conserve the surgeon's energ and increase his efficiency.

Another object of the invention is to provide an operating support for surgeons that can be readily adjusted to comfortably accommodate persons of different stature, physique and operating technique.

Another object of the invention is'to provide an operating support for surgeons that is easily cleaned and completely safe to use in the environment of an operating room.

A further object of the invention is to provide an operating support for surgeons that may carry a surgical light to better illuminate the operating field.

A still further object of the invention is to provide an operating support for surgeons that is simple indesign and relatively economical to produce.

THE INVENTION In general, these objects and others ancillary thereto are accomplished by providing an operating support for surgeons that can be selectively positioned and secured in proximity to the operating table. The seat of the device is adjustable in height above the floor and a platform or the like for supporting the surgeon's feet is adjustable relative to the seat. The device can be quickly readjusted, removed or repositioned should this be desirable or necessary during an operation. The device includes a chest-support assembly against which the surgeon normally leans while operating, thereby substantially relieving a material portion of the weight of the surgeon.

In a preferred embodiment of the invention, the chest-support assemlby functions to yieldingly oppose the surgeons forward leaning. A light may be carried by the chest-support assembly or mounted elsewhere on the device and can be used as needed to provide variable intensity illumination of the surgical site. Adjustable parts of the operating support are calibrated so that once a surgeon is fitted to the device it can be quickly reset to his exact specifications. The device may be electrically grounded and is otherwise suitably constructed for use in a surgical operating room.

The novel features considered characteristic of the invention are set forth with particularity in the appended claims. The invention itself, however, both as to its organization and its method of operation, to- I gether with additional objects and'advantages thereof, will best be understood from the following description of specific embodiments when read in connection with the accompanying drawings in which FIG. 1 is a left-side view in elevation, broken away in part, of an operating support for surgeons in accordance with the present invention;

FIG. 2 is a front view in elevation of the operating support illustrated in FIG. 1;

FIG. 3 is a rear view in elevation of the same operating support;

FIG. 4 is an enlarged left-side view in elevation of the operating support illustrated in FIGS. 1, 2 and 3 and depicts. the manner of its use by a surgeon;

FIG. 5 is a side elevational view,- broken away in part, illustrating one fonn of a'movement-regulating mechanism applicable to the operating support for surgeons;

FIG. 6 is a view of the underside of the operating support base, shown in FIGS. 1 through 4, incorporating a vacuum arrangement for releasably securing the sup port in an operating room; I

FIG. 7 is a view in perspective of another embodiment of the invention with a portion broken away to better show its construction;

FIG. 8'is a side elevational view, broken away in part, of still another embodiment of the invention;

FIG. 9 is a side elevational view, broken away in part, of an operating support for surgeons illustrating yet another specific embodiment of the invention;

FIG. 10 is a sectional view taken along the lines 10-10 of FIG. 9; 7

FIG. 11 is a side elevational view, broken away in part, of yet another form of the invention; and

FIG. 12 is a perspective view of the device shown in FIG. 11.

Since the invention is capable of other embodiments and of being practiced or carried out in various ways,

it is to be understood that the invention is not limited in its application to the details of construction and arrangement of parts illustrated in the accompanying drawings. Also it is to be understood that the phraseology or terminology employed herein is for the purpose of description and not of limitation.

Referring now to the drawings, the specific embodiments of the invention illustrated are designed to be comparatively lightweight so that they can be simply carried into the operating room. Heavier versions might include retractable wheels or casters, or be moved around with a hand truck or the like. After the device is positioned in proximity to the operating table, it must be secured in place against the possibility of accidental movement or unintentional displacement of any kind. This can be accomplished in a variety of ways. However, it is assumed that in most cases the operating support will be attached to the floor. Great flexibility in positioning the device can be achieved by attaching it tothe floor by means of a vacuum arrangement such as that associated with the operating support illustrated in FIGS. 1 through 6.

This embodiment of the invention has a base 11 having a perimeter element 13 made of a resilient material like rubber or vinyl. Beneath the base 11 there are three vacuum elements 15 that function like vacuum cups to hold the operating support in place. Each vacuum element 15 is served by a pipeline P1, P2 and P3 that extends from the element to a convenient location of the structure of the operating support where it terminates in a suction-line connection. For example, suction-line connections might be located in a recess at points C1, C2 and C3 as shown in FIGS. 1 and 3.

Modern operating rooms are equipped with a piped suction system for use by the surgeon in keeping the incision dry and for the anesthetists use in keeping the patients throat clear. This system can be used for initial evacuation of the vacuum elements 15 and even thereafter to maintain suction on the elements during the operation. Then again, a vacuum pump could be provided exclusively for use with the operating support. The operating support can be released from the floor by valving air to the vacuum elements 15.

Formed solid with the base 11 is an upstanding main frame member 17 having at its upper end a cylindrical guideway 19. The guideway 19 has a vertical bore to which a seat post 21 is carefully fitted so that it can be moved smoothly up and down through the bore. A saddle-like seat 23 is mounted atop seat post 21 and can turn on the vertical axis of the seat post. The height of the seat 23 above the floor can be adjusted by sliding the seat post 21 through the guideway 19. The seat post 21 is locked at the desired elevation by screwing the post lock pin 25 into the most appropriate of the holes 26 that are spaced apart and drilled through the seat post. The post lock pin 25 actually screws through the threaded forward wall of the guideway 19 since the seat post holes themselves are not threaded.

These verticallyarrayed holes are similarly used for positioning the foot platform 27 in suitable spaced relation to the seat 23. The foot platform 27 has its own integral guideway 29 and a screw-threaded lock pin 30. In FIGS. 1 through 4, the seat post 21 is shown in the full down position with its lower end resting on top of the base 11.

FIG. 4 clearly illustrates how a surgeon leaning toward the operating field is supported by the chestsupport assembly 31. Basically, this assembly consists of a chest-support piece 33 which is pivotally con nected to an extensible arm 35. The extensible arm 35 is carried by a sheath-like member 37 that is in turn connected to a movementregulating mechanism housed by the shell of seat 23.

The movement-regulating mechanism itself can be of many forms, for example, the resistance to pivotal movement offered by the chest-support assembly 31 may be adjusted by using handwheel 39, FIG. 5, to compress a spring 41 located within the shell of seat 23. FIG. 5 exemplifies the type of movement-regulating mechanism that would be applicable. Referring more specifically to FIG. 5, it will be seen that an extension 43 of the sheath-like member 37 passes into the shell of seat 23 through an opening 45. The extension 43 pivots on pin 47 and is connected to the handwheel 39 by linkage that makes the chest-support assembly 31 responsive to the degree of compression imposed on the spring 41 by said handwheel.

Adjustment of the chest-support assembly 31 is of course directed to promoting the steadiness and comfort of the surgeon. A simple lock pin and hole arrangement can also be used to adjust the length of the extensible arm 35. Numeral 49 designates a screw-threaded lock pin for the extensible arm 35. During an operation, the chest-support piece 33 may be covered with a disposable pad 51 and the operating support as a whole may be partially or'completely draped.

Another way of attaching an operating support to the floor would be to bolt the base of the device to female screw-threaded fixtures installed at appropriate places in the floor. When not in use, these fixtures would be sealed by small cover plates. An operating support utilizing this bolt-down method is illustrated in FIG. 7. In this embodiment of the invention, the base 53 of the operating support is bolted to a floor fixture through a slot 55 in its trailing portion. A bolt 57 holds the device in place by bearing on the flanged bottom of the slot 55. Considerable latitutde in positioning the operating support is achieved with this simple arrangement since the device can be moved forward or backward the length of the slot and swung 360 degrees around the floor fixture.

Formed solid with the. base 53 of the FIG. 7 form of the invention is an upstanding tubular main frame member 59 having a vertical bore that is open at both ends. Slidingly fitted to the bore is a seat post 61 that carries a seat 63. The desired elevation of the seat is accomplished by inserting an elevating rod increment 65 of suitable length into the bore of the tubular member 59. A plurality of elevating rods in assorted lengths are provided for this purpose. With the end of the seat post resting on an elevating rod there is no possibility of the seat post slipping during an operation. The seat post may be rigidized by tightening handwheel 67.

A foot platform 69 is adjustable relative to the seat 63 and can be clamped at the desired elevation by tightening handwheel 71. The seat 63 can turn on the vertical axis of the seat post 61 and carries with it a chest-support assembly. The chest-support assembly illustrated has a flat spring arm 73 that yieldingly resists the surgeon's forward leaning and the chest-support piece 75 can be raised or lowered on the arm 73 to suit the surgeon.

Numeral 77 designates a surgical light that is mounted on the front-side of the chest-support assembly. It is readily evident that a surgical light held in this general area would be extremely useful in many cases. For example, the light could be used to provide shadowless, deep illumination of the surgical cavity when the surgeon interposes himself between the usual overhead light and the operating field. The surgeon or an assistant may control the light, turning it on or off and regulating its brightness at will through suitable means.

In FIG. 8 of the drawings there is shown an operating support for surgeons that has the features previously described, i.e., a seat 79, a chest-support assembly 81, a foot platform 83 and means for securing the device in place. In this case the operating support is secured in place by means of a post 85 that telescopes from floor to ceiling. The post has a lower portion 87 that fits a collar 89 on the elongated base 91. The upper portion 93 of the post carries a cap 95 that provides a suitable bearing surface on the ceiling 97. The post 85 is locked in telescoped position by means of handwheel 99. Alternatively, a jacking system could be used to raise and lock the post in position.

In FIG. 8 the main frame member 101 is fixed to the base 91 and the seat 79 is carried by a tubular member 103 that fits over the main frame member and is movable thereon for adjusting the height of the seat above the floor.

The embodiment of the invention illustrated in FIGS. 9 and has a seat 79, a chest-support assembly 81 and a seat-carrying tubular member 103 that are similar to those shown in FIG. 8. However, in other respects the device is considerably different. For instance, it is secured in place by suspending it from the ceiling 105,by means of a permanently installed ceiling fixture 107. FIG. 10 is a sectional view of the ceiling fixture 107 taken along lines 10-10 of FIG. 9.

The ceiling fixture 107 is designed to receive and hold a channeled member 109 that is attached to the upper end of post 111. Fitted to the post lll'is a tubular guideway 113 that can be raised or lowered on'the post to adjust the height of the surgeon s foot support 1 15. The guideway 1 13 is locked in the desired position by tightening handwheel 117. The guideway 113, the foot support 115, the main frame member 119 and the connecting member 121 form a single unitary structure. The seat 79 is of 'course adjusted to a'suitable height with respect to the adjustment of the foot support. The guideway 113 can be" swung 360 degrees around the post 111 and the post can be moved the length of the ceiling fixture 107. A threaded rod 123 can be screwed out of the seat post 119 by means of handwheel 125 so as ,to solidly contact the floor and thereby rigidize the suspended operating support.

Referring particularly to FIGS. 11 and 12, the surgeons support includes a generally hollow base member 127 which has secured therein a plurality of electromagnets 129 which are connected to a source of electrical energy via a conductor 131. The electromagnets 129 coa'ct with a metal plate 133, embedded below the surface of the operating room floor, designated 135, in a zone adjacent an operating table. With this arrangement, the support may be positioned in proximity to the operating table within the zone of the metal plate 133 and releasably secured in such position by energizing the electromagnets 129.

The foot-supporting platform 137 in the FIGS. 11 and 12 form of the invention is itself supported by a plurality of elevating rods 139. The elevating rods are designed so that one end screws into the base of the foot platform 137 while the other end is slidably received by bores 141 located atop the base member 127. A number of elevating rods 139 of varying lengths are provided with each unit so that the height of the foot platform can be adjusted to suit individual requirements.

The seat 141 is adjustably mounted relative to the upper end ofa main support member 143 via a cylindrical post 145 which is slidably received in a vertical bore in element 147. The position of the seat 141 is fixed by tightening the handwheel 149 so as to clamp the post 145 in the bore of element 147.

The chest support 151 for the surgeon is relatively rigidly carried by an upstanding arm 153 extending from the forward portion of the seat 141. As previously described, the chest support 151 may include a surgical light 155 to beam light forward and downward onto the operating field.

In order to provide limited pivotal movement for the seat and chest support, in the form of the invention illustrated in FIGS. 11 and 12, the lower end 157 of the main support member 143 is connected to the base 127 on a horizontal pivot generally designated by numeral 159. A lower extension 161 of the main support member 143 terminatesin a plate 163, the lower surface of which normally rests on the upper surface of a partition 165, internally positioned within the base 127. A flat spring 167 has one end 169 in contact with the top surface of the plate 163, and its opposite end suitably secured as at 171 in the base.

The flat spring 167 may be replaced by a coil spring provided with suitable adjusting means.

In FIG. 11, the limit of pivotal movement of the support is represented by arrows A and a positive lower limit stop is obtained when the tip 173 of the plate 163 approaches the undersurface 175 of the top of the base member 127.

Although certain specific embodiments of the invention have been shown and described, it is obvious that many modifications thereof are possible, including permanent installations with elaborate built-in structure with provision for powered'transport and adjustment of the device. The invention, therefore, is not to be restricted except insofar as is necessitated by the prior art and the scope of the appended claims.

I claim; j

1. An operating support for surgeons, comprising a generally upstanding frame member, means for releasably securing said frame member in proximity to an operating table, a seat, means for adjustably securing said seat to said frame for movement in a generally vertical direction, a support for the surgeons feet, means for adjustably securing said support for the surgeons feet for movement in a vertical direction and in spaced relation to said seat, a chest support assembly against which the surgeon normally leans while operating, means for mounting said chest support from said seat, said chest support mounting means comprising a single support member mounted at one end at the forward end of the seat and carrying the chest support at the other end whereby a surgeon using the operating support can properly position himself relative to the operating field and can work with less fatigue and increased efficiency. I

2. An operating support for surgeons as set forth in claim 1 wherein said means for releasably securing said frame member in proximity to an operating table comprises a base member and floor engaging vacuum elements carried by said base member.

3. An operating support for surgeons as set forth in claim 1 wherein said means for securing said frame member in proximity to an operating table includes a base and mechanical means for attaching the base to a floor.

4. An operating support for surgeons as set forth in claim 1 wherein said means for securing said frame member in proximity to an operating table includes means for suspending the frame from the ceiling of an operating room.

ingly oppose the surgeon as he leans toward the operating field.

6. An operating support for surgeons, comprising in combination, a seat-supporting structure, means for securing said structure in proximity to an operating table, a seat for the surgeon, means for adjusting the height of said seat above the floor of an operating room, a support for the surgeons feet, means for adjusting said support for the surgeon's feet in spaced relation to said seat, a chest-support assembly having means to yieldingly oppose the surgeon as he leans towardthe operating field, and a surgical light mounted to said chestsupport assembly.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US341748 *Aug 20, 1885May 11, 1886 Stool
US454100 *Oct 23, 1890Jun 16, 1891 wilson
US1113833 *May 13, 1914Oct 13, 1914Christian S RuffAdjustable and collapsible autocycle seat-back.
US1275739 *Apr 10, 1918Aug 13, 1918Ethel R PittiSwing.
US1417250 *Apr 14, 1920May 23, 1922Emmett Kelly RobertBack brace
US3029106 *May 13, 1959Apr 10, 1962John O McguireSurgeon's operating chair
US3037570 *Apr 26, 1961Jun 5, 1962Harold Olson JohnPowered vehicle controlled by harvesting worker
US3041636 *Nov 29, 1960Jul 3, 1962Arthur B TwedtInvalid lifter and transporting device
US3093356 *Mar 23, 1962Jun 11, 1963Buyalos Jr Michael AHobby horse base
US3165314 *Jul 9, 1962Jan 12, 1965Jerome P ClearmanInvalid walker and ambulatory aid
US3220771 *Feb 23, 1965Nov 30, 1965Doss Sr Nolon MReverse sun deck chair
US3477673 *Feb 3, 1967Nov 11, 1969Bereday SigmundLeaning device to reduce fatigue
CA490536A *Feb 17, 1953Wyatt Bentley ChildsDentist's chair
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3894601 *Feb 12, 1974Jul 15, 1975TechnibioticsSurgical support
US3949983 *Mar 10, 1975Apr 13, 1976The Raymond Lee Organization, Inc.Prone board for pediatric physical therapy
US4552404 *Oct 12, 1983Nov 12, 1985Congleton Jerome JNeutral body posture chair
US4607882 *Dec 6, 1984Aug 26, 1986Peter OpsvikChair with saddle shaped seat and members externally transversely therefrom
US4637604 *Aug 27, 1984Jan 20, 1987Burt Dupont Blanche APhysical therapy device
US4662361 *Sep 16, 1985May 5, 1987Merrill PattersonPhysical therapy chair
US4832407 *Nov 27, 1987May 23, 1989Hector SerberVariable posture chair and method
US4858991 *Nov 23, 1987Aug 22, 1989Eyvind BoyesenChair for infants
US4915325 *Nov 29, 1988Apr 10, 1990United States Of America As Represented By The Administrator, National Aeronautics And Space AdministrationFull body restraint system
US4976494 *Jul 26, 1989Dec 11, 1990Polley Robert F LForward recumbent posture pod
US4978167 *Nov 20, 1989Dec 18, 1990Harvey Henry RBicycle saddle with body support
US5149174 *Jul 1, 1991Sep 22, 1992Ruth A. CharashErgonomic stand
US5242212 *Aug 17, 1990Sep 7, 1993Polley Robert F LPosture pod
US5295728 *Jan 23, 1990Mar 22, 1994Schaevitz Lester PErgonomic multi-position work stand
US5401078 *Jun 3, 1992Mar 28, 1995Oakworks, Inc.Adjustable therapy chair
US5490716 *Jul 25, 1994Feb 13, 1996Naughton; Michael L.Surgeon's chair
US5542746 *Mar 17, 1994Aug 6, 1996Bujaryn; L. WalterVariable posture component system seating device
US5604428 *Apr 27, 1995Feb 18, 1997Deutsche Thomson-Brandt GmbhDevice for generating intermediate voltages
US5725280 *Aug 5, 1996Mar 10, 1998Kushnir; MichaelSurgeon's perch
US5971485 *May 30, 1997Oct 26, 1999Clark; RolandAdjustable, folding chair for massage
US6619747Apr 25, 2001Sep 16, 2003Kam KoTorso and forearm supporting device for chairs and workstands
US6695407 *Aug 26, 2002Feb 24, 2004Ming-Chuan LinHeight adjusting device for stool
US6959962 *Oct 17, 2002Nov 1, 2005Barry James DixonSupport apparatus for seated patient
US7047716 *Feb 28, 2003May 23, 2006Deere & CompanyConvertible support
US7090303Jun 5, 2003Aug 15, 2006William KropaRehabilitation training and exercise chair
US7121629 *Apr 19, 2004Oct 17, 2006Shang-Wei ChouHealthy chair
US7523993 *Nov 23, 2007Apr 28, 2009Nova Bus, Division De Groupe Volvo Canada Inc.Passenger dorsal support
US7618090 *Dec 6, 2006Nov 17, 2009Distribution Gablex Inc.Abdominal support swivel chair
US7784871 *Dec 4, 2008Aug 31, 2010Dennis CochranOccupational support system
US7887136 *Aug 15, 2008Feb 15, 2011Stefan ZoellDevice for supporting a human body in various positions
US7980625 *Jun 13, 2008Jul 19, 2011Christian Shane WorthingtonBack jack
US8070221Aug 19, 2008Dec 6, 2011Ethos Surgical, LlcOperating support for surgeons
US8317267 *Jul 14, 2010Nov 27, 2012Jay Stuart WallaceErgonomic saddle chair
US8480168Nov 2, 2011Jul 9, 2013Ethos Surgical, LlcOperating support for surgeons
US20100051386 *Aug 29, 2009Mar 4, 2010Miriam Machovic BasicSurgeon lift system
US20110012397 *Jul 14, 2010Jan 20, 2011Jay Stuart WallaceErgonomic Saddle Chair
US20110163577 *Jan 7, 2011Jul 7, 2011Innovative Medical Systems GpSurgeon chair system
DE8805614U1 *Apr 28, 1988Jul 14, 1988Johann Breitenstein Gmbh, 4240 Emmerich, DeTitle not available
EP0163437A1 *May 7, 1985Dec 4, 1985Peter OpsvikA chair
EP0224564A1 *May 23, 1986Jun 10, 1987Hector SerberErgonomic seating assembly.
EP0501411A1 *Feb 25, 1992Sep 2, 1992Arie RamonSeating means
WO1985001643A1 *Oct 10, 1984Apr 25, 1985Jerome J CongletonNeutral body posture chair
WO1986003116A1 *Nov 21, 1985Jun 5, 1986Schmitz & Soehne Gmbh & Co KgDevice for supporting a standing working position
WO1995001116A1 *Jul 1, 1994Jan 12, 1995Fraunhofer Ges ForschungModular working chair
WO2001000061A1Jun 27, 2000Jan 4, 2001Brault RichardAn improved open-angle seat for a chair
WO2004023938A1 *Sep 10, 2003Mar 25, 2004Juraj MichalekErgonomic seat workplace
WO2007121547A1 *Apr 20, 2006Nov 1, 2007Distrib Gablex IncAbdominal support swivel chair
WO2010024933A2Aug 29, 2009Mar 4, 2010Miriam Mackovic-BasicSurgeon lift system
Classifications
U.S. Classification297/195.11, 297/423.38, 297/217.1, 297/487, 297/467
International ClassificationA61B19/00, A47C9/02
Cooperative ClassificationA61B19/28, A47C9/025
European ClassificationA61B19/28, A47C9/02D