US3656805A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chair control and support
Assignee: INTERROYAL CORP
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Filing: 1969-09-15
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Granted: 1972-04-18
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Expires: 1989-09-15
Abstract
Abstract An improved tilt control and support mechanism for a chair seat assembly utilizing a simplified sturdy construction wherein a single plate-like element functions to support the seat assembly and, in cooperation with an adjustable compression spring, yieldably restrains the tilt movement of the chair seat in a uniform and controlled manner to permit the occupant to bring the chair seat to a comfortable tilted rest position and return it to a substantially horizontal position.
Inventors
- 👤 Carl J Engstrom
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:24
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/44; A47C7/443; A47C3/00; A47C3/02; A47C3/025; A47C3/026; A47C7/441
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
128 words
In a chair having a base, a vertical post supported by said base and a seat assembly, a chair control and support mechanism comprising; a. A bracket secured to the underside of said seat assembly, b. a plate rigidly mounted on the top of the vertical post for supporting said bracket, said plate and said bracket each formed of a single sheet of metal downturned side portions, c. a horizontal pivot bolt extending through the downturned side portions of said bracket and the downturned side portions of said plate rearwardly of said vertical post and defining a pivot axis for achieving relative tilting movement between said bracket and said plate, and d. resilient compressible means acting between said bracket and said plate to yieldably resist said tilting movement.
Claim 2
Dependent Claim
128 words
In a chair having a base, a vertical post supported by said base and a seat assembly, a chair control and support mechanism comprising; a. A bracket secured to the underside of said seat assembly, b. a plate rigidly mounted on the top of the vertical post for supporting said bracket, said plate and said bracket each formed of a single sheet of metal downturned side portions, c. a horizontal pivot bolt extending through the downturned side portions of said bracket and the downturned side portions of said plate rearwardly of said vertical post and defining a pivot axis for achieving relative tilting movement between said bracket and said plate, and d. resilient compressible means acting between said bracket and said plate to yieldably resist said tilting movement.
Claim 3
Dependent Claim
47 words
The invention of claim 1 wherein the plate rigidly mounted on the top of the vertical post has an angle of tilt of about 4* -8* with the horizontal whereby the forward end of the plate is higher in elevation than the rear portion of the plate.
Claim 4
Dependent Claim
45 words
The invention of claim 1 wherein the cap of the screw threadably engaged to the web of the plate rearwardly of the vertical post acts as a stop to limit the backward tilting movement of the bracket secured to the underside of the seat assembly.
Claim 5
Dependent Claim
56 words
The invention of claim 1 wherein a bumper of resilient material mounted on the underside of the web portion of the bracket contacts the web portion of the plate to the rear of the vertical post mounting so as to limit the backward tilting movement of the bracket secured to the underside of the seat assembly.
Claim 6
Dependent Claim
93 words
The invention of claim 1 wherein the resilient compressible means acting between said bracket and said plate comprises a helical spring having a frustoconical configuration, the end of the spring having the larger diameter compressively the spring having the larger diameter compressively engaged to the bottom surface of the web portion of the plate forward of the vertical post mounting, and the end of the spring having a smaller diameter retained by a spindle threadably engaged to a bolt, said bolt passing axially through the spring, the plate, and anchored to the bracket.
Claim 7
Dependent Claim
58 words
The invention of claim 1 wherein a bumper of resilient material interposed between the web portion of the bracket and the web portion of the plate forward of the vertical post mounting acts to cushion the bracket stop against the plate as the chair seat is returned from the tilt position by the action of the compression spring.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-04-18 | 1975-10-18 | 1976-04-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-04-18 | 1979-10-18 | 1980-04-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-04-18 | 1983-10-18 | 1984-04-18 | $7700.00 | Window Closed / Lapsed |