US3356359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Prestressed furniture spring
Assignee: Lear Siegler Inc
•
Filing: 1967-05-23
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Granted: 1967-12-05
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Expires: 1987-05-23
Abstract
No abstract record available.
Inventors
- 👤 John J Bond
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:25
CPC Classifications
A; A47; A47C; A47C7/00; A47C7/02; A47C7/28; A47C7/30
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
IN A SPRING ASSEMBLY FOR MOUNTING ON A FURNITURE FRAME; A SINUOUS SPRING SHAPED TO HAVE ITS LENGTH FOLLOW AN ARCUATE PATH WHEN SAID SPRING IS IN ITS RELAXED CONDITION, A PRESTRESS LEVER FORMED BY A PORTION DISPLACED FROM THE RELAXED PATH OF THE REMAINDER OF THE SPRING, SAID PRESTRESS LEVER SUPPORTED BY THE FURNITURE FRAME AND COUPLED TO SAID SINUOUS SPRING, SAID PRESTRES LEVER EXERTING A PRESTRESS FORCE ON SAID SINUOUS SPRING TO FLATTEN ITS ARCUATE CONFIGURATION WHEN SAID SPRING IS MOUNTED ON THE FURNITURE FRAME TO IMPROVE THE CHARACTERISTICS OF SAID SPRING FOR FURNITURE APPLICATIONS; AN AUXILIARY SPRING EXTENDING FROM SAID SINUOUS SPRING TO PROVIDE A SPRING SUPPORT AT AN EXTREMITY OF THE FURNITURE FRAME; MOUNTING MEANS FOR MOUNTING SAID AUXILIARY SPRING TO SAID SINUOUS SPRING; AND REINFORCING MEANS ON SAID AUXILIARY SPRING IN ENGAGEMENT WITH SAID PRESTRESS LEVER TO REINFORCE SAID PRESTRESS LEVER TO AVOID DAMAGE TO THE SPRING BY THE PRESTRESS FORCES.
Claim 2
Dependent Claim
156 words
IN A SPRING ASSEMBLY FOR MOUNTING ON A FURNITURE FRAME; A SINUOUS SPRING SHAPED TO HAVE ITS LENGTH FOLLOW AN ARCUATE PATH WHEN SAID SPRING IS IN ITS RELAXED CONDITION, A PRESTRESS LEVER FORMED BY A PORTION DISPLACED FROM THE RELAXED PATH OF THE REMAINDER OF THE SPRING, SAID PRESTRESS LEVER SUPPORTED BY THE FURNITURE FRAME AND COUPLED TO SAID SINUOUS SPRING, SAID PRESTRES LEVER EXERTING A PRESTRESS FORCE ON SAID SINUOUS SPRING TO FLATTEN ITS ARCUATE CONFIGURATION WHEN SAID SPRING IS MOUNTED ON THE FURNITURE FRAME TO IMPROVE THE CHARACTERISTICS OF SAID SPRING FOR FURNITURE APPLICATIONS; AN AUXILIARY SPRING EXTENDING FROM SAID SINUOUS SPRING TO PROVIDE A SPRING SUPPORT AT AN EXTREMITY OF THE FURNITURE FRAME; MOUNTING MEANS FOR MOUNTING SAID AUXILIARY SPRING TO SAID SINUOUS SPRING; AND REINFORCING MEANS ON SAID AUXILIARY SPRING IN ENGAGEMENT WITH SAID PRESTRESS LEVER TO REINFORCE SAID PRESTRESS LEVER TO AVOID DAMAGE TO THE SPRING BY THE PRESTRESS FORCES.
References Cited (Backward Citations)
US2542458A
Cited
US2652885A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |