INVALID CHAIR

• US 3,640,566 A
• Filed: 10/07/1969
• Issued: 02/08/1972
• Est. Priority Date: 10/11/1968
• Status: Expired due to Term

• Current Assignee: George Alwyn Hodge
• Original Assignee: George Alwyn Hodge
• Inventors: Hodge, George Alwyn
• Primary Examiner(s): Gilliam, Paul R.
• Application Number:
  US04/864,424
• Time in Patent Office: 854 Days
• Field of Search: 297/68,71,83,86,90,91 5/60,81
• US Class Current: 297/68
• CPC Class Codes: A61G 5/006 convertible to stretchers or beds
• CPC Class Codes: A61G 5/128 for feet
• CPC Class Codes: A61G 5/14 Standing-up or sitting-down aids
• CPC Class Codes: Y10S 297/10 Occupant-arising assist

Abstract

An invalid chair having a seat back hinged to the back of the seat and a lower frame hinged to the front of the seat to form an extensible assembly which is pivoted to a main support frame, the seat being spring loaded in a direction to extend the assembly of frames so that an invalid is assisted from the seat on to his feet, the assembly also being positionable in a recumbent position so that the chair functions as a bed.

Claims

1. A chair having a seat frame, pivot means connecting the rear end of the seat frame to a back frame, further pivot means connecting the front end of the seat frame to a lower frame, link means between the back frame and the lower frame limiting relative angular relationship therebetween upon tilting of the seat frame, a footstool, pivot means connecting the footstool to the lower end of the lower frame, link means between the footstool and a said frame limiting angular movement of the footstool upon tilting of the seat frame, said footstool and frames constituting an extensible assembly which in its extended position has said frames more nearly in alignment than when in its retracted position, a main support frame, main pivots between the seat frame and the main support frame, support brackets on the main frame supporting the seat frame when said extensible assembly is in its retracted position, a seat frame lifting lever, pivot means pivotally supporting said lever on the main frame, means on the lever engaging the under surface of the seat frame, a tension spring connected at its respective ends to the lifting lever and the main frame urging the seat frame upwardly and forwardly thereby in turn urging the frames of said extensible assembly towards their relatively extended positions.

2. A chair having a seat frame, a back frame, first hinge means connecting the back frame to the rear end of the seat frame, a lower frame, further hinge means connecting the lower frame to the front end of the seat frame to form with the seat and back frames an extensible assembly, link means further interconnecting said frames, a main support frame, main pivots connecting one of the frames of said extensible assembly to the main support frame, a seat frame lifting lever, pivot means pivotally supporting said lever on the main frame, means on the lever engaging an under surface of the seat frame, and spring means connected to the lifting lever and to the main frame to urge the seat frame upwardly and forwardly thereby in turn urging the frames of said extensible assembly towards their relatively extended positions said link means includes a link, first pivot means pivotally connecting the rear end of the link to a downward extension of the back frame, a second link means including a link arm pivotally connected to the seat frame and extending downwardly therefrom:

further pivot means operatively and pivotally connecting the front end of the link to the link arm and including a member pivotally operatively connecting to the lower frame and to the link arm between its connections to the seat frame and to the link;

the distance between said first hinge means and said further hinge means being a little greater than the distance between said first pivot means and said further pivot means so that the angular relationship between the back frame and lower frame varies by only a small amount as the extensible assembly moves from an extended to a retracted position.

3. A chair according to claim 1 further comprising support brackets secured to the main frame and positioned to support the seat frame when in its retracted position, and latch means on the seat frame and main frame cooperating to releasably retain the seat frame in its retracted position.

4. A chair according to claim 1 further comprising a pressure imparting arm, hinge means at the upper end of the pressure imparting arm hingedly connecting it to the seat frame, a roller journaled to the lower end of the pressure imparting arm, and a pressure plate extending rearwardly from the lower frame, said main pivots being between first said pivot means and said further pivot means so that the pressure plate is engaged by the pressure roller only as the frames of said extensible assembly move towards and into their extended positions.

5. A chair according to claim 4 further comprising a seat back lift spring connected at one end to said pressure imparting arm and at the other end to the rear of the main frame, said link means between the back frame and lower frame being constituted by a link, pivot means between one end of the link and said pressure imparting arm and further pivot means between the other end of the link and a downward extension of said back frame, the seat back lift spring thereby being extended by movement of the frames of said extensible assembly into their relative extended recumbent positions.

6. A chair according to claim 2 wherein the link means includes a link, first pivot means pivotally connecting the rear end of the link to a downward extension of the back frame, a second link means including a link arm pivotally connected to the seat frame and extending downwardly therefrom;

further pivot means operatively and pivotally connecting the front end of the link to the link arm and including a member pivotally operatively connecting to the lower frame and to the link arm between its connections to the seat frame and to the link;

the distance between said first hinge means and said further hinge means being a little greater than the distance between said first pivot means and said further pivot means so that the angular relationship Between the back frame and lower frame varies by only a small amount as the extensible assembly moves from an extended to a retracted position.