US3869172A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair reclining mechanism
Assignee: PONTIAC FURNITURE INDUSTRIES Inc
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Filing: 1973-06-28
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Granted: 1975-03-04
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Expires: 1993-06-28
Abstract
Abstract A reclining chair mechanism having its back supported for reclining rotation and forward shifting movement relative to a base, and its seat supported by overslung links which elevate the seat front rapidly upon forward shifting movement of the seat by the reclining rotation of the back, and wherein the seat is connected to the back in a manner such as to maintain the leverage of the occupant''s weight upon the seat to counteract the leverage of the occupant''s weight upon the back to prevent acceleration in the reclining movement and to maintain the chair in balance in various degrees of recline.
Inventors
- 👤 Henry James
- 👤 Carl B Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
A; A47; A47C; A47C1/00; A47C1/02; A47C1/031; A47C1/032
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
213 words
In a reclining chair having a base, a seat, a back, and linkage means at each side of the chair interconnecting said back and seat and mounting the same upon said base for movement relative thereto and to each other from a sitting position to a reclining position, the improvement wherein said linkage means supports the back upon the base for forward shifting movement through a fixed path relative to the base as an incident to recline of the back and includes at least one back link extending upwardly from the base to back and pivoted to both for rotation forwardly on the base by the recline of the back, a seat link connectiNg the forward portion of the seat to the base and being inclined rearwardly and upwardly from the base to the seat when in said sitting position, and a lever pivoted on said back link and connected by a control link to a portion of said chair other than said seat and with respect to which said back link is relatively movable upon the recline of the back, said lever being also pivoted to the rearward portion of the seat to support the seat and to move the seat forwardly relative to the base of the recline of the back.
Claim 2
Dependent Claim
213 words
In a reclining chair having a base, a seat, a back, and linkage means at each side of the chair interconnecting said back and seat and mounting the same upon said base for movement relative thereto and to each other from a sitting position to a reclining position, the improvement wherein said linkage means supports the back upon the base for forward shifting movement through a fixed path relative to the base as an incident to recline of the back and includes at least one back link extending upwardly from the base to back and pivoted to both for rotation forwardly on the base by the recline of the back, a seat link connectiNg the forward portion of the seat to the base and being inclined rearwardly and upwardly from the base to the seat when in said sitting position, and a lever pivoted on said back link and connected by a control link to a portion of said chair other than said seat and with respect to which said back link is relatively movable upon the recline of the back, said lever being also pivoted to the rearward portion of the seat to support the seat and to move the seat forwardly relative to the base of the recline of the back.
Claim 3
Dependent Claim
74 words
The improvement of claim 1 wherein said back is supported by two links each pivoted to the base and extending upwardly therefrom to pivotal connections to the back to form a trapezoidal four-bar linkage with said base and back and wherein said lever is pivoted to the forwardmost one of said two links, and said control link connects said lever to one of said base, said back, or the other of said two links.
Claim 4
Dependent Claim
35 words
The improvement claimed in claim 1 wherein said control link rotates said lever to advance the pivotal attachment of the lever to the seat faster than the pivot of the lever to said back link.
Claim 5
Dependent Claim
48 words
The improvement claimed in claim 2 wherein said lever is a bell crank whose pivot to said forward-most link is disposed between and above the pivotal connections of the bell crank to said seat and to said control link, and said control link is pivoted to said back.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-03-03 | 1978-09-02 | 1979-03-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-03-03 | 1982-09-02 | 1983-03-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-03-03 | 1986-09-02 | 1987-03-04 | $7700.00 | Window Closed / Lapsed |