Patent US4423903A successfully refreshed from Google Patents.
US4423903A
Expired / Lapsed
US
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Handle operated incliner chair
Assignee: Individual
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Filing: 1981-04-30
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Granted: 1984-01-03
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Expires: 2001-04-30
Abstract
Abstract An incliner chair has a combined seat and backrest member moveable from a normal occupant sitting position to an occupant inclining position by means of a mechanism attached to a stationary chair frame, by an occupant-operable handle. The handle causes a rotary element connecting identical mechanisms on either side of the chair to actuate linkages that simultaneously thrust out a footrest member and pull down and forward the rear of the seat part with its attached back while thrusting up and forward the front of the seat. A two link control assembly is provided to control and guide the back from moving backward from its normal position to the inclined position and comprise a control link attached intermediate its length to a toggle plate which is itself pivotably connected to the chair frame upwardly and rearwardly of the axis of the rotary element. The toggle plate is pivotably attached to a primary thrust lever at a point allowing the back control lever to be pivoted intermediate it and the toggle frame pivot point. One end of the back control link is attached to the rear of the seat bottom and the other end is attached to a guide link which is in turn attached to the chair frame, and is the second link in the control assembly.
Inventors
- 👤 William V. Gerth
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 12:01
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/034; A47C1/0342; A47C1/0345
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
278 words
A mechanism, connected to base plates fixed to a chair frame, for actuating the seat, back, and footrest of a chair between; (a) the substantially normal position of the said seat and back and a retracted position of the footrest and; (b) a partially and relatively inclined position of the said seat and back and extended portion of the said footrest, comprising the combination with hand operated rotary elements on one side of said chair actuated by the occupant, of a pair of seat-supporting bars, said footrest comprising a concatenated tong assembly having forward ends thereto pivotably connected to a footrest plate, footrest control lever bars pivotably connected at forward ends thereof to said tong assembly; crank arms connected to said rotary element; rearwardly extending primary links, toggle plates pivotably connected to said base plates rearwardly of the rotary axis of said element; said primary links being pivotably connected at their rear ends to said toggle plates, said control bars being pivotably connected at rear ends thereof to said toggle plates; a back controlling assembly including (a) back controlling levers pivotably connected between their ends to said toggle plates, the forward ends of said levers being pivotably connected to said seatsupporting bars and (b) swing-links pivotably connected at both their forward and rear ends to the rear ends of said levers and said base plates respectively whereby said back is caused upon actuation of said mechanism to move through an arcuate path in which it is limited to downward movement only forwardly from its normal or upright position; and secondary link levers pivotably connected to the sides of said chair and said seat-supporting bars for controlling said bars.
Claim 2
Dependent Claim
278 words
A mechanism, connected to base plates fixed to a chair frame, for actuating the seat, back, and footrest of a chair between; (a) the substantially normal position of the said seat and back and a retracted position of the footrest and; (b) a partially and relatively inclined position of the said seat and back and extended portion of the said footrest, comprising the combination with hand operated rotary elements on one side of said chair actuated by the occupant, of a pair of seat-supporting bars, said footrest comprising a concatenated tong assembly having forward ends thereto pivotably connected to a footrest plate, footrest control lever bars pivotably connected at forward ends thereof to said tong assembly; crank arms connected to said rotary element; rearwardly extending primary links, toggle plates pivotably connected to said base plates rearwardly of the rotary axis of said element; said primary links being pivotably connected at their rear ends to said toggle plates, said control bars being pivotably connected at rear ends thereof to said toggle plates; a back controlling assembly including (a) back controlling levers pivotably connected between their ends to said toggle plates, the forward ends of said levers being pivotably connected to said seatsupporting bars and (b) swing-links pivotably connected at both their forward and rear ends to the rear ends of said levers and said base plates respectively whereby said back is caused upon actuation of said mechanism to move through an arcuate path in which it is limited to downward movement only forwardly from its normal or upright position; and secondary link levers pivotably connected to the sides of said chair and said seat-supporting bars for controlling said bars.
Claim 3
Dependent Claim
63 words
The mechanism according to claim 1 in which the points at which said crank arms are pivotably connected to said rotary element and at which said primary links are pivotably connected to said toggle plates are substantially in line with the rotary axis of said element, said pivotable connections being forward and rearward of said pivotable connections respectively when said footrest is extended.
Claim 4
Dependent Claim
52 words
The mechanism according to claim 2 in which an angle of less than 180° exists between said points of pivotable connection when said footrest is extended, and wherein said toggle plates are connected at one end thereof to said base plates frame rearwardly and upwardly of the rotary axis of said element.
Claim 5
Dependent Claim
39 words
The mechanism according to claim 2 in which the primary links are connected to the toggle plates intermediate the points of connections of the control link levers and the connection of the toggle plate to the said base plates.
Claim 6
Dependent Claim
52 words
The mechanism of claim 1 wherein the back control levers are connected to the toggle plates intermediate the connections of the primary links to the toggle plates and the connection of the toggle plates to the base plates thereby insuring that the back moves downward and forward with extension of the footrest.
References Cited (Backward Citations)
US3357739A
Cited
US3433527A
Cited
US3743349A
Cited
US4113305A
Cited
US4212494A
Cited
US4319780A
Cited
US4346933A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-02 | 1987-07-04 | 1988-01-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-02 | 1991-07-04 | 1992-01-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-02 | 1995-07-04 | 1996-01-03 | $7700.00 | Window Closed / Lapsed |