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CA1041893A - Elevationally adjustable surgical chair for a doctor - Google Patents

Elevationally adjustable surgical chair for a doctor

Info

Publication number
CA1041893A
CA1041893A CA 260020 CA260020A CA1041893A CA 1041893 A CA1041893 A CA 1041893A CA 260020 CA260020 CA 260020 CA 260020 A CA260020 A CA 260020A CA 1041893 A CA1041893 A CA 1041893A
Authority
CA
Grant status
Grant
Patent type
Prior art keywords
foot
tube
seat
stand
support
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA 260020
Other languages
French (fr)
Inventor
Kurt Schattmaier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Contraves AG
Original Assignee
Contraves AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Grant date

Links

Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C3/00Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20Chairs or stools with vertically-adjustable seats
    • A47C3/30Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00Joints and connections
    • Y10T403/71Rod side to plate or side
    • Y10T403/7123Traversed by connector

Abstract

INVENTOR: KURT SCHATTMAIER
INVENTION: SURGICAL CHAIR FOR A DOCTOR

ABSTRACT OF THE DISCLOSURE

A surgical chair for a doctor embodying an infinitely elevationally adjustable seat connected with a support column, a stand tube arranged within the support column, at which there is attached a base frame equipped with rollers and a lifting device within the stand tube. The lifting device is operatively con-nected with the support column and can be unblocked by a lever system so that the seat, depending upon the degree of loading thereof, is elevationally adjustable. A foot pedal located bet-ween two overhang members of the base frame is arranged with its upper edge at most four centimeters above the floor and with ad-justable freedom of movement with respect to the floor. The foot pedal is secured by a lever to an angle lever pivotably mounted at the stand tube and acts upon a plunger of the lifting device.
At least three guide grooves are provided at the support column and extend uniformly about its inner periphery and parallel to its central axis. At least two superimposed sets of spaced rollers are secured at the outer periphery of the stand tube in operable association with the guide grooves arranged at the support column.

Description

104~893 BACKGROUND OF THE INVENTION

The present invention relates to a new and improved construction of surgical chair for a doctor or treating physician.
The term "doctor" is used herein in its broader sense as relating to individuals with various type of medical training.

A rotatable chair for a doctor has been disclosed in German patent publication 1900,949 wherein a ring-shaped foot-operated switching plate is arranged above a base or foot frame formed of individual cantilever or overhang members. The switch-ing plate, through the agency of a switching plunger and a til-table lever of a valve, activates a gas spring or cushion and thus i renders possible infinite elevational adjustment of the seat. In order to ensure for such elevational adjustment of the seat, de-pending upon the degree of loading or unloading thereof, during -~ treatment by the physician, it is necessary with this rotatable chair that the doctor lift his body weight with one foot and . with his other foot operate the switching plate. It will be ; evident that such requires undesired shifting of the weight of the body as well as one-sided loading of the body, which does not guarantee either the necessary secure and steady standing of the rotatable chair upon the floor or the required firm standing , of the doctor, and thus, restricts to an unwarranted extent the I activity of the treating physician.

J
, - 2 -.

104~893 A combined surgical chair having a pivotable work chair for the treating physician is taught in German patent publi-cation 1,110,818 wherein there is provided a pivotable arm having a hoIding device for a foot pedal switch for regulating, for instan-ce, a drilling machine used by a dentist at the neighborhood of the surgical chair. The pivotable arm, for instance of resilient con-struction, adjustable to a certain braking action, and arranged with the foot rest flat above the floor is designed such that when it is loaded by the weight of the foot of the doctor the load is taken up by the floor, and hence, when necessary, the work chair or seat can be rocked without difficulty out of the working re-gion and the foot pedal switch remains as previously in its prede-termined position.

SUMMARY OF THE INVENTION
, Starting with the aforementioned state-of-the-art it is a primary object of the present invention to provide a stable .
surgical chair wherein, while maintaining contact with the floor :
~' with both feet and without any assistance from the hands of the operator, there is possible a continuous elevational adjustment of a seat secured to a support column by means of a pedal actuated by the heel of one foot, and further, a support column which teles-copically engages over a stand tube is guided centrally and axially .
displacable at the stand tube without canting and at the same time ;~

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.~. ~ ,.. . . . .. . .

104~893 is positively secured against rotation to the stand tube, and wherein the foot or base frame consisting of a number of cant-ilevers or overhang arms and secured to the stand tube has a relatively small reach or overhang.

Still a further significant object of the present in-vention aims at the provision of a new and improved construc-tion of surgical chair which is relatively simple in construc-tion and design, economical to manufacture, extremely reliable in operation, and allows for easy elevational adjustment of the seat by the user.
.' .
Now in order to implement these and still further ob-jeets of the invention, the surgical chair for a treating physi-eian or the like as contemplated by the invention comprises a seat infinitely adjustable in elevation and seeured to a support eolvmn. A stand tube is arranged within the support column and a foot or base frame provided with rollers is secured to the stand tube. A lifting device is arranged within the stand tube and is operatively eonnected with the support column and ean be unloeked or activated by means of a lever system, so that the seat, depending upon loading thereof, is elevationally ad-justable. Aeeording to important aspects of the invention the surgical chair is manifested by the following combination of features:

104~893 (a) a foot pedal is arranged symmetrically between two cantilevers or overhang members of the ~ase frame with adjustable elevational spacing from the floor and has its upper edge at most four centimeters above the floor, the foot pedal is operatively connected by a lever with an angle lever pivotably mounted at the stand tube and acting upon a plunger of the lifting device; ..

(b) at least three guide grooves are provided at the support column and extend substantially parallel to the central axis thereof and are uniformly distri- -buted about its inner periphery; and (c) at least two superimposed mutually spaced :-.
rollers or roller means are arranged at the outer peri-phery of the stand tube in operative association with the guide grooves provided at the support column.

BRIEF DESCRIPTION OF THE DRAWINGS

.
., The invention will be better understood and objects other than those set forth above, will become apparent when con-~ 20 sideratlon is given to the following detailed description there- .

; of. Such de~cription makes reference to the annexed drawings ~ whereln:
.~ .
., ~ .

;
,, .

~041893 : Figure 1 illustrates in longitudinal sectional view the essential components of an elevationally adjustable surgical chair together with the schematically illustrated lifting device.
. ~

Figure 2 is a plan view, taken in section along : the line II - II of Figure 1, of the base portion of the chair; and .~ Figure 3 is a cross-sectional view taken substan-tially along the line III - III of Figure 1.

DETAILED DESCRIPTION OF THE PREFERRED_EMBODIMENTS

.~ :
Describing now the drawings, there is shown in Figu-. re 1, in longitudinal sectional view, an exemplary embodiment ~ of a surgical chair having an infinitely elevationally adjusta- : .
ble seat 1, a support column 3, a stand or vertical tube 4 arranged within the support column 3 and at which there is se- :-cured the base or floor frame 6, and a lifting device 5 arranged within the stand tube or pipe 4.
~;
I At the lower side the lifting device 5, which is .~ equipped at such side with a plunger 21, bears upon a disc or ~ 20 plate 13 having a bore 25. This plate 13 is arranged in the ' .~ :
.' - 6 -"

~, .
,~ , .
/, j , . . . .. . . .

~041893 stand tube 4 and is retained by a securing ring 22 engaging about the shoulder of the lifting device 5 guided through the bore 25. In order to facilitate assembly of the securing ring 22 an opening 12 is provided at a suitable location in the wall of the stand tube or pipe 4. At the opposite upper side the lifting device 5 is provided with a piston rod 20 extending with its stepped end 20a through a suitably formed bore 24 of a disc or plate 19 arranged in the support column 3. The pis-ton rod 20 is held by means of a securing ring 23 engaging about such stepped end 20a of the piston rod 20.

: At the outer periphery of the stand tube 4 there are rotatably mounted in any suitable and therefore not par-` ticularly illustrated manner at least three uniformly distri-buted rollers 18 and in spaced relation therefrom three further .
rollers 16 at the respective holder rings 17 and 15 attached to the stand tube 4. ~, - Guide grooves 14 are provided for the rollers 16, 18.
These guide grooves 14 are arranged in a distributed manner ana-logous to the distribution of the rollers 16, 18 and extend pa-rallel to the central axis of the support column and are uni-formly arranged at the inner periphery of the support column 3. --. Further such guide grooves 14 extend from the lower edg~ of the.s support column 3 up to approximately the plate or disc 19. In ~ this way the seat 1 having a seat plate 2 and secured by not , .

~.041893 particularly illustrated means e.g. fastening bolts or the like, at the support column 3 provided with the spaced brackets 34, during up and down movement, is optimumly guided and at the same time secured against rotation. In Figure 1 the rollers 16, 18 with the associated grooves 14 have been illustrated in an offset arrangement.

Figure 3 is a sectional plan view and illustrates the support column 3 with the grooves 14, the stand or vertical tube 4 with the holder ring 17, the diameter of which is some-what smaller than the inner diameter of the support column 3, the rollers or rolls 18 guided in the grooves 14, and the piston rod 20 of the lifting device 5.
, The base or floor frame 6 attached to the stand tube 4, in the illustrated embodiment, consists of four individual cantilevers or overhang arms 27 equipped with the travelling rol-lers or casters 7. These arms 27 have a relatively small over-:. hang, and additionally, can be provided with balance or compen-, sation weights 28 arranged in the overhang arms in order to impart still greater stability to the surgical chair. Above the overhang arms 27 there is provided at an appropriate ele-,~ vation a foot rest 26 bearing upon the overhang arms, and which .~ preferably iB constructed and arranged in the manner shown in ~ Figure 2. .-.j .

~, ,'' An angle lever 10 is mounted at a bolt 32 serving as an axis of rotation or pivot point. The angle lever 10 is symmetrically arranged between two cantilevers or overhang arms 27 at the lower end of the stand tube 4 between two bea-ring plates or members 31, for instance formed of sheet metal, secured to the stand tube 4. One end of the angle lever 10 extends through a slot 11 provided in the stand tube 4 up to the plunger 21 of the lifting device 5 and is operatively connected with i.è. contacts such plunger. At the other end of the angle :
lever 10 there is secured at the lower portion thereof a foot lever 9 having a foot pedal 8. - --. . .
The foot lever 9 together with its foot pedal 8 se-cured by the pin 30 or the like at the angle lever 10 can be :
variably adjusted in elevation with respect to the floor and i also in spaced relation from the stand tube 4 due to the matchedholes 29 and 33 provided at the foot lever 9 and the angle lever , 10 and by selectively shifting the pin 30. The height of the .
upper edge of the foot pedal 8 from the floor at most amounts to 4 centimeters, but in any event is advantageously selected to ' 20 be only so large that there is ensured that there can be carriedout by the plunger 21 the stroke required for actuation of a not particularly illustrated control valve arranged in the lifting device 5.

The lifting device 6 is preferably in the form of a conventlonal gas sprlng or cushion having a control valve and a ~ _ 9 _ ,, , pre-biased filling medium which, upon actuation of the valve, with the seat not loaded, infinitely elevationally displaces the same and when the seat is loaded moves down, and throughout the range of the stroke or displacement of the seat in each desired position of the seat, the gas spring and thus the seat .
can be blocked.

According to a not particularly illustrated variant embodiment of the invention the possibility exists of providing a control device at the surgical chair which indicates the pre~-sure of the pre-biased filling medium in the gas spring and at the same time indicates the functional reliability of the sur-gical chair.
. .

The inventive surgical chair fulfills the require-ments of random accommodation of the seat height to the momen-tary conditions with greatest operational reliability, and in-tentionally there has not been provided rotatability of the ~ seat, in order to be able to undertake positioning of the foot-t~ actuation pedal by means of the seat. Hence, the surgical chair can be delivered to the operator standing near the operating table and such can adjust the required seat height by either randomly using the left or right heel raised from the ankle joint, and without loosing his balance.

., .
... .
, , . .

,, , . . , ' ' : " .

Claims (5)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. In a surgical chair for a treating physician, comprising an infinitely elevationally adjustable seat, a sup-port column at which there is secured the seat, a stand tube arranged within the support column, a base frame having rollers connected with the stand tube, a lifting device arranged within the stand tube and operatively connected with the support co-lumn, a lever system for unblocking the lifting device, so that the seat, depending upon the load applied thereto, is elevationally adjustable, the improvement comprising:

(a) the infinitely adjustable seat being non-rotatably mounted at the support column;

(b) the base frame having a plurality of overhang arm members;

(c) the lifting device having a plunger;

(d) an angle lever pivotably mounted at the stand tube and acting upon said plunger;

(e) a foot pedal having an upper edge;

(f) means mounting the foot pedal with its upper edge at most four centimeters above the floor and symmetrically disposed between two over-hang arm members of the base frame and with adjustable freedom of movement with respect to the floor;

(g) a lever for connecting the foot pedal with the angle lever;

(h) at least three guide grooves provided at the support column, said guide grooves being substantially uniformly distributed about the inner periphery of the support column and extending substantially parallel to the central axis of said support column;

(i) a pair of spaced rollers engaged in each of said guide grooves, and secured to the outer periphery of the stand tube; and (j) said surgical chair, during its normal position of use, having said foot pedal between the legs of the user, said non-rotatable seat safeguarding against undesirable shifting of the body of the user relative to the foot pedal, to thereby ensure that said foot pedal is maintained between the legs of the user, and wherein the user can carry out elevational adjustment of the non-rotatable seat at such time that the buttocks of the user are located directly over the seat of the surgical chair and with both legs of the user supported on the floor and with one leg actuating the foot pedal by the heel portion of such actuating leg through the ankle joint thereof.
2. The surgical chair as defined in claim 1, fur-ther inlcuding means for vertically and horizontally adjusting the foot pedal together with said lever connected with the angle lever.
3. The surgical chair as defined in claim 1, fur-ther including compensation weights provided for the overhang arm members of the base frame.
4. The surgical chair as defined in claim 1, fur-ther including a foot rest supported at the overhang arm members and arranged above the foot pedal between at least two of said overhang arm members.
5. In a surgical chair for a treating physician, comprising an infinitely elevationally adjustable seat, a support column at which there is secured the seat, a stand tube arranged within the support column, a base frame having rollers connected with the stand tube, a lifting device arranged within the stand tube and operatively connected with the support column, a lever system for unblocking the lifting device, so that the seat, de-pending upon the load applied thereto, is elevationally adjustable, the improvement comprising:

(a) the infinitely adjustable seat being non-rotatably carried by the support column;

(b) the base frame having a plurality of overhang arm members;

(c) the lifting device having a plunger;

(d) an angle lever pivotably mounted at the stand tube and acting upon said plunger;

(e) a foot pedal having an upper edge;

(f) means mounting the foot pedal with its upper edge at a predetermined spacing above the floor and symmetrically disposed between two overhang arm members of the base frame and with adjustable freedom of movement with respect to the floor;

(g) a lever for connecting the foot pedal with the angle lever;

(h) at least three guide grooves provided at the support column, said guide grooves being sub-stantially uniformly distributed about the inner periphery of the support column and extending substantially parallel to the central axis of said support column;

(i) a pair of spaced rollers engaged in each of said guide grooves, and secured to the outer periphery of the stand tube; and (j) said surgical chair, during its normal position of use, having said foot pedal between the legs of the user, said non-rotatable seat safe-guarding against undesirable shifting of the body of the user relative to the foot pedal, to thereby ensure that said foot pedal is maintained between the legs of the user, and wherein the user can carry out elevational adjustment of the non-rotatable seat at such time that the buttocks of the user are located directly over the seat of the surgical chair and with both legs of the user supported on the floor and with one leg actuating the foot pedal by the heel portion of such actuating let through the ankle joint thereof.
CA 260020 1975-09-30 1976-08-27 Elevationally adjustable surgical chair for a doctor Expired CA1041893A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CH1263475 1975-09-30

Publications (1)

Publication Number Publication Date
CA1041893A true CA1041893A (en) 1978-11-07

Family

ID=4384934

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 260020 Expired CA1041893A (en) 1975-09-30 1976-08-27 Elevationally adjustable surgical chair for a doctor

Country Status (9)

Country Link
US (1) US4061304A (en)
JP (1) JPS6151898B2 (en)
BE (1) BE845332A (en)
CA (1) CA1041893A (en)
DK (1) DK140583C (en)
FR (1) FR2326165B1 (en)
GB (1) GB1556251A (en)
LU (1) LU75645A1 (en)
NL (1) NL7607814A (en)

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US5213295A (en) * 1991-05-31 1993-05-25 Steelcase Inc. Two-way actuator for a chair height adjustment mechanism
US5366275A (en) * 1993-06-16 1994-11-22 L & P Property Management Company Gas operated foot stool
US5782536A (en) * 1995-02-17 1998-07-21 Steelcase Inc. Modular chair construction and method of assembly
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CA2568078C (en) * 2006-11-14 2014-03-18 Unifor S.P.A. Telescopic table support
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US8308124B2 (en) * 2010-10-28 2012-11-13 Jung Yu Hsu Control device for adjustable bicycle seat
US9010867B2 (en) 2012-06-01 2015-04-21 Steelcase Inc. Stool with tilted orientation
US9089217B2 (en) * 2012-09-21 2015-07-28 Baultar I.D. Inc. Seat adjustment system
CN105899176A (en) 2014-01-15 2016-08-24 松下电器产业株式会社 Working posture holding device
US9188278B1 (en) * 2014-05-16 2015-11-17 Chin-Chu Li Lifting support structure
CN105465562A (en) * 2016-01-15 2016-04-06 舒丽燕 Medical bearing platform capable of moving stably
CN105502216A (en) * 2016-01-15 2016-04-20 桐乡市佳栋贸易有限公司 Medical bearing assembly

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Also Published As

Publication number Publication date Type
CA1041893A1 (en) grant
DK140583C (en) 1980-03-10 grant
JPS5244095A (en) 1977-04-06 application
JP1383722C (en) grant
DK332076A (en) 1977-03-31 application
FR2326165A1 (en) 1977-04-29 application
BE845332A (en) 1976-12-16 grant
GB1556251A (en) 1979-11-21 application
US4061304A (en) 1977-12-06 grant
NL7607814A (en) 1977-04-01 application
DK140583B (en) 1979-10-08 grant
LU75645A1 (en) 1977-03-31 application
BE845332A1 (en) grant
JPS6151898B2 (en) 1986-11-11 grant
FR2326165B1 (en) 1982-05-14 grant

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