US4778157A
Expired / Lapsed
US
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Spring module
Assignee: Leggett and Platt Inc
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Filing: 1987-06-25
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Granted: 1988-10-18
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Expires: 2007-06-25
Abstract
Abstract A spring module for disposition between a base frame and a grid frame of a spring assembly embodying upper and lower attaching elements for attachment to, respectively, the grid frame and the base frame and spaced, parallel, vertically-disposed, yieldable legs, each leg embodying a vertically-disposed loop of wire and upwardly and downwardly, oppositely-inclined, V-shaped lengths of wire extending from the loop to, respectively, the upper and lower attaching elements.
Inventors
- 👤 Kenneth H. Thomas
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 16:11
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0438; A47C23/02
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
139 words
A spring module comprising upper and lower attaching elements for attachment to a grid frame and a base frame, said module comprising vertically-disposed, spaced, parallel legs connected at their upper ends to the upper attaching element and at their lower ends to the lower attaching element, each leg comprising substantially midway between the upper and lower attaching elements a loop of wire disposed in a generally vertical plane from which extend upwardly and downwardly-inclined straight lengths of wire which are, respectively, connected to the upper and lower attaching elements and wherein the loops are situated in spaced, parallel, vertical planes in overlapping relation to each other such that the adjacent sides of the coils pass through the centers of the respective loops and the upwardly and downwardly-inclined lengths of wire of the respective legs are inclined in opposite directions.
Claim 2
Dependent Claim
139 words
A spring module comprising upper and lower attaching elements for attachment to a grid frame and a base frame, said module comprising vertically-disposed, spaced, parallel legs connected at their upper ends to the upper attaching element and at their lower ends to the lower attaching element, each leg comprising substantially midway between the upper and lower attaching elements a loop of wire disposed in a generally vertical plane from which extend upwardly and downwardly-inclined straight lengths of wire which are, respectively, connected to the upper and lower attaching elements and wherein the loops are situated in spaced, parallel, vertical planes in overlapping relation to each other such that the adjacent sides of the coils pass through the centers of the respective loops and the upwardly and downwardly-inclined lengths of wire of the respective legs are inclined in opposite directions.
Claim 3
Dependent Claim
35 words
A spring module according to claim 1 wherein the upwardly and downwardly-inclined straight lengths of wire diverge with respect to each other and the loops of wire are disposed between the diverging lengths of wire.
Claim 4
Dependent Claim
14 words
A spring module according to claim 1 wherein the loops of wire are circular.
Claim 5
Dependent Claim
47 words
A spring module according to claim 1 wherein the upper and lower attaching elements comprise spaced, parallel, generally horizontal lengths of wire disposed at right angles to the vertical planes of the legs and diagonal lengths of wire in the plane of the parallel lengths of wire.
Claim 6
Dependent Claim
25 words
A spring module according to claim 4 wherein the diagonal lengths of wire of the upper and lower attaching elements are disposed in opposite directions.
Claim 7
Dependent Claim
16 words
A spring module according to claim 4 wherein the spaced, parallel lengths of wire contain deviations.
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) | 1991-10-18 | 1992-04-18 | 1992-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-18 | 1996-04-18 | 1996-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-18 | 2000-04-18 | 2000-10-18 | $7700.00 | Window Closed / Lapsed |