PATIENT{3 S CHAIR

• US 3,596,982 A
• Filed: 05/15/1969
• Issued: 08/03/1971
• Est. Priority Date: 05/15/1969
• Status: Expired due to Term

• Current Assignee: Guenter A. Grams
• Original Assignee: Guenter A. Grams
• Inventors: Grams, Guenter A.
• Application Number:
  US04/824,819
• Time in Patent Office: 810 Days
• US Class Current: 297/71
• CPC Class Codes: A61G 15/02 Chairs with means to adjust position of patient; Controls therefor

Abstract

A chair intended for doctor'"'"''"'"'s patients which is provided with a first electric motor and screw drive power unit, a linkage assembly for raising and lowering the chair, and a second electric motor and screw drive power unit including a linkage and cam assembly for tilting and horizontally extending the chair; an auxiliary linkage is provided which retracts a footrest as the chair assumes its lower position to avoid being hit by the patient'"'"''"'"'s or doctor'"'"''"'"'s foot or ankle.

Claims

1. A patient'"'"''"'"'s chair, comprising:

a. a base structure;

b. a seat structure;

c. raising and lowering means connected to the base structure and the back side of the seat structure, said means, when in its lower position, forming a space under the forward portion of the seat structure and above the base structure;

d. a leg support pivotally depending from the front of said seat structure;

e. a footrest pivotally connected with said leg support;

f. and linkage connected to said leg support and extending under said seat structure, said linkage being operatively connected to said raising and lowering means when said seat structure approaches its lower position to draw said footrest and leg support into said space under said seat structure.

2. A patient'"'"''"'"'s chair, as defined in claim 1, wherein:

a. said seat structure includes a seat and back, and means for tilting said seat and back between a position receiving a patient in an upright seated position and a position receiving a patient in an upright seated position and a position receiving a patient in a reclined position;

b. said linkage having a connection, in addition to its connection with said raising and lowering means, with said tiling means for moving said leg support and footrest between a position receiving a patient in an upright seated position and a position receiving a patient in a reclined position.

3. A patient'"'"''"'"'s chair, comprising:

a. a base structure;

b. a chair seat having a back margin and a front margin;

c. a lower strut means pivotally connected to said base structure and extending upwardly and forwardly therefrom;

d. an upper strut means pivotally connected to said chair seat at the back margin thereof;

e. means pivotally connecting said lower and upper strut means for movement between a folded position in which said upper strut means extends forward and underlies said chair seat and said upper and lower strut means converge forwardly at a lesser angle and an extended position in which said upper and lower strut means converge forwardly at a greater angle;

f. and longitudinally extensible and retractable means for moving said upper and lower strut means between their folded position and their extended position.

4. A patient'"'"''"'"'s chair, as defined in claim 3, wherein:

a. a leg support depends from the front margin of said chAir seat;

b. a foot support extends forwardly from said leg support;

c. and means are provided to retract said footrest under said chair seat with said leg support contiguous to said lower strut means when said upper and lower strut means are in their folded position.

5. A patient'"'"''"'"'s chair, as defined in claim 3, wherein:

a. said upper and lower strut means include linkage operable to maintain said chair seat in predetermined angular relation with said base structure as said strut means move between their extended and folded position.

6. A patient'"'"''"'"'s chair, as defined in claim 3, which further comprises:

a. a back and head-supporting means pivotally connected with the back margin of said chair seat;

b. a leg support pivotally connected with the front margin of said chair seat;

c. a foot support pivotally connected with said leg support;

d. and extensible and retractable means, interconnecting said chair seat and supporting means to effect movement between a position supporting a person in a seated upright position and an inclined position.

7. A patient'"'"''"'"'s chair, comprising:

a. a fixed base member;

b. a rotatable base structure mounted thereon;

c. a lower forward pair of struts and a lower rearward pair of struts pivotally mounted on said base structure, the members of each pair of struts being laterally spaced from each other and directed upwardly;

d. an upper bottom pair of struts and an upper top pair of struts, the members of each pair of struts being laterally spaced from each other;

each of the top pair of struts being pivotally connected to both the corresponding forward and rearward struts; and

each of the bottom struts being pivotally connected to the corresponding forward strut;

said upper struts extending rearwardly from the lower struts;

e. a carrier structure pivotally connected to the upper struts;

f. an extension and retraction means pivotally connected between said base structure and said top struts to raise and lower said carrier structure, the pivotal connections between said struts, base structure and carrier being so related that said carrier structure moves vertically essentially free of tilting movement;

g. and a seat structure mounted on said carrier.

8. A patient'"'"''"'"'s chair, as defined in 7, wherein:

a. said extension and retraction means includes a reversible motor, a jackscrew and traveler sleeve, and a weight-compensating spring urging said carrier toward its extended position.

9. A patient'"'"''"'"'s chair, as defined in claim 7, wherein said seat structure further comprises:

a. a seat frame pivotally connected to said carrier;

b. a back frame pivotally connected to said seat frame;

c. cam and roller means incorporating said back frame and said carrier;

d. and thrust and retraction means connected to said seat frame and to said carrier to effect tilting movement of said seat frame and said back frame.

10. A patient'"'"''"'"'s chair, as defined in claim 9, wherein said seat structure still further comprises:

a. a leg support pivotally connected to said seat frame;

b. a foot support pivotally connected to said leg support;

c. and linkage extending between said leg support and said back frame operable on tilting said seat structure to extend and retract said leg and foot supports.

11. A patient'"'"''"'"'s chair, comprising:

a. a seat structure;

b. raising and lowering means including lower and upper sets of pivotally connected struts having a lower position wherein the lower set of struts slope upwardly and forwardly toward the front of the seat structure to define a recess thereunder;

c. a leg support pivotally depending from the front of said seat structure;

d. a footrest pivotally connected with said leg support;

e. and linkage connected to said leg support and extending under said seat structure, said linkage being operatively connected to said raising and lowering means when said seat structure appRoaches its lower position to draw said footrest and leg support into said recess and under said seat structure.

12. A patient'"'"''"'"'s chair, comprising:

A. a seat structure;

B. a leg support pivotally connected to the seat structure;

C. a footrest pivotally connected to the leg support;

D. a first linkage extending between the footrest and seat structure for maintaining the footrest in essentially parallel relation to the seat structure;

E. a second linkage extending from the leg support under the seat structure for pivoting the leg support forwardly and rearwardly;

F. and means for raising and lowering the seat structure, engageable with the second linkage, as the seat structure approaches its lower position, to pivot the leg support and retract the footrest under the seat structure.

13. A patient'"'"''"'"'s chair, as defined in claim 12, which further comprises:

a. a backrest pivotally connected to the seat structure;

b. means connected to the backrest and seat for tilting the backrest between an essentially vertical position and an essentially horizontal position and for tilting the seat structure between an essentially horizontal position and an inclined position;

c. said tilting means being engageable with the second linkage to pivot the leg support forwardly with respect to the seat structure.