Patent US4684111A successfully refreshed from Google Patents.
US4684111A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bent wire spring module
Assignee: Leggett and Platt Inc
•
Filing: 1986-02-14
•
Granted: 1987-08-04
•
Expires: 2006-02-14
Abstract
Abstract A spring module for use in a spring assembly embodying a base frame and a grid frame comprising lower and upper attaching elements for connecting the module to the base frame and grid frame and a plurality of lower and upper symmetrically-disposed, legs yieldable in bending connecting the lower and upper attaching elements.
Inventors
- 👤 Robert C. Hagemeister
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:13
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0438; F; F16; F16F; F16F1/00; F16F1/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
104 words
A spring module comprising lower and upper attaching elements by means of which the module can be attached, respectively, to a base frame and a grid frame and means yieldably connecting the lower and upper attaching elements comprising in transversely-spaced, parallel, vertical planes, first oppositely-inclined, upwardly-extending legs, second oppositely-inclined, downwardly-extending legs, said first legs being connected to the lower attaching element, said second legs being connected to the upper attaching element, third oppositely-inclined legs inclined in opposite directions from the first and second legs, and fourth vertically-disposed legs connecting the first legs to the third legs and the second legs to the third legs.
Claim 2
Dependent Claim
104 words
A spring module comprising lower and upper attaching elements by means of which the module can be attached, respectively, to a base frame and a grid frame and means yieldably connecting the lower and upper attaching elements comprising in transversely-spaced, parallel, vertical planes, first oppositely-inclined, upwardly-extending legs, second oppositely-inclined, downwardly-extending legs, said first legs being connected to the lower attaching element, said second legs being connected to the upper attaching element, third oppositely-inclined legs inclined in opposite directions from the first and second legs, and fourth vertically-disposed legs connecting the first legs to the third legs and the second legs to the third legs.
Claim 3
Dependent Claim
19 words
A spring module according to claim 1 wherein the first, second and third legs are substantially the same length.
Claim 4
Dependent Claim
16 words
A spring module according to claim 1 wherein the fourth legs are substantially the same length.
References Cited (Backward Citations)
US386846A
Cited
US2843191A
Cited
US3487480A
Cited
US3761972A
Cited
US4577841A
Cited
US4595180A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1990-08-03 | 1991-02-02 | 1991-08-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-08-03 | 1995-02-02 | 1995-08-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-08-03 | 1999-02-02 | 1999-08-04 | $7700.00 | Window Closed / Lapsed |