Patent US3608960A successfully refreshed from Google Patents.
US3608960A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable back support
Assignee: McDonnell Douglas Corp
•
Filing: 1970-09-03
•
Granted: 1971-09-28
•
Expires: 1990-09-03
Abstract
Abstract A back support in which a change in contour is provided not only in the front to rear plane but also vertical adjustment is provided to match the contour of the back of the seat occupant. Two arms are attached to a mounting plate secured to the seat back structure behind the cushion. These arms have outer end supports which pivot in a horizontal plane from front to rear to vary the ''''wrap-around'''' curvature of the back support. The arms also are tiltable vertically to adjust the contour to fit. Vertical resilient stays are provided within the seat cushion adjacent the hinged arms to spread the cradling effect on the cushion over a satisfactory distance.
Inventors
- 👤 Gale K Sherman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:15
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/36; A47C7/40; A47C7/46
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
102 words
An adjustable back support comprising a mounting plate for attachment to a seat back structure, a pair of arms pivotally mounted on said plate for limited movement in a substantially vertical plane, each of said arms having outer end supports pivotally mounted thereon for movement in a substantially horizontal plane, biased ratchet means for adjustably positioning said outer end supports in multiple extending positions forwardly of said back structure, and a back support cushion positioned over said plate, arms and outer end supports, whereby the contoUr of said cushion can be changed and the position of contour change may be adjusted vertically.
Claim 2
Dependent Claim
102 words
An adjustable back support comprising a mounting plate for attachment to a seat back structure, a pair of arms pivotally mounted on said plate for limited movement in a substantially vertical plane, each of said arms having outer end supports pivotally mounted thereon for movement in a substantially horizontal plane, biased ratchet means for adjustably positioning said outer end supports in multiple extending positions forwardly of said back structure, and a back support cushion positioned over said plate, arms and outer end supports, whereby the contoUr of said cushion can be changed and the position of contour change may be adjusted vertically.
Claim 3
Dependent Claim
54 words
An adjustable back support as in claim 1 wherein said cushion has vertically positioned resilient stays affixed to the rear surface thereof in line with said outer end supports whereby, upon extending said outer end supports forwardly, said stays will bow and spread the cradling effect on said cushion to produce gradual contour change.
Claim 4
Dependent Claim
27 words
An adjustable back support as in claim 2 wherein said cushion has vertically spaced pockets on the rear surface thereof to receive the ends of said stays.
Claim 5
Dependent Claim
21 words
An adjustable back support as in claim 1 wherein said plate has limit stops to limit vertical movement of said arms.
Claim 6
Dependent Claim
24 words
An adjustable back support as in claim 1 wherein said cushion is attached to said seat back structure intermediate the ends of said cushion.
Claim 7
Dependent Claim
63 words
An adjustable back support as in claim 1 wherein said outer end supports are connected to said arms at points intermediate the outer ends of said arms, and wherein said ratchet means includes teeth on said arms and tangs pivotally mounted on said outer end supports engageable with said teeth to adjustably maintain said end supports in extended positions forwardly of said arms.
Claim 8
Dependent Claim
40 words
An adjustable back support as in claim 6 wherein said tangs have outer ends pivotally connected to said outer end supports and inner ends engageable with said teeth, and spring means urging said inner ends into contact with said teeth.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |