Patent US3638254A successfully refreshed from Google Patents.
US3638254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring
Assignee: UNIROYAL PLASTICS COMPANY Inc WORLD HEADQUARTERS MIDDLEBURY CT 06749 A CORP OF
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Filing: 1970-05-15
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Granted: 1972-02-01
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Expires: 1990-05-15
Abstract
Abstract A plastic spring having two longitudinal sides joined by transverse sides having curved portions. The upper and lower halves of the spring are symmetrical. Upper curved portions are disposed directly over lower curved portions to cause vertical deflection of the spring without horizontal roll in response to load. A mattress foundation utilizing such springs has border springs so mounted as to tend to slant outwardly but held in a vertical position by the foundation cover, thereby keeping the cover taut.
Inventors
- 👤 Vernon A Falkenau
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:14
CPC Classifications
A; A47; A47C; A47C23/00; A47C23/04; A47C23/043; A47C23/0438; A47C7/00; A47C7/02; A47C7/34; A47C7/342
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
159 words
A spring comprising: A plastic member of substantially constant width having symmetrical half portions with a pair of approximately parallel longitudinal sides, each half portion having a bounding transverse side region and a central transverse side rEgion at each end of each longitudinal side, said central and bounding transverse side regions having curved portions, said central transverse side regions joining said bounding transverse side regions and said transverse side regions joining said longitudinal sides, said curved portions of said central transverse side regions being more closely disposed than said curved portions of said bounding transverse side regions at opposite ends of said longitudinal sides in the absence of stress on the spring, the outermost portions of said transverse side regions at each end of said longitudinal sides being disposed substantially in the same transverse plane normal to said longitudinal sides at each end of said longitudinal sides, the height of said member being substantially greater than said width thereof.
Claim 2
Dependent Claim
159 words
A spring comprising: A plastic member of substantially constant width having symmetrical half portions with a pair of approximately parallel longitudinal sides, each half portion having a bounding transverse side region and a central transverse side rEgion at each end of each longitudinal side, said central and bounding transverse side regions having curved portions, said central transverse side regions joining said bounding transverse side regions and said transverse side regions joining said longitudinal sides, said curved portions of said central transverse side regions being more closely disposed than said curved portions of said bounding transverse side regions at opposite ends of said longitudinal sides in the absence of stress on the spring, the outermost portions of said transverse side regions at each end of said longitudinal sides being disposed substantially in the same transverse plane normal to said longitudinal sides at each end of said longitudinal sides, the height of said member being substantially greater than said width thereof.
Claim 3
Dependent Claim
109 words
A spring in accordance with claim 1 in which said central and bounding transverse side regions have straight portions and in which said curved portions of said bounding transverse side regions are such that said longitudinal sides and said straight portions of said bounding transverse side regions are disposed at angles of approximately 26* relative to each other in the absence of stress on the spring and in which said curved portions of said central transverse side regions are such that said straight portions of said central transverse side regions are disposed at angles of approximately 52* relative to each other in the absence of stress on the spring.
Claim 4
Dependent Claim
11 words
A spring in accordance with claim 1 which is of polypropylene.
Claim 5
Dependent Claim
234 words
A spring support comprising: a frame having an outer border and an inner portion; a plurality of springs mounted on said frame, each spring comprising a plastic member of substantially constant width having symmetrical half portions with a pair of approximately parallel longitudinal sides, each half portion having a bounding transverse side region and a central transverse side region at each end of each longitudinal side, said central transverse side regions joining said bounding transverse side regions and said transverse side regions joining said longitudinal sides, said curved portions of said central transverse side regions being more closely disposed than said curved portions of said bounding transverse side regions at opposite ends of said longitudinal sides in the absence of stress on each spring, the outermost portions of said transverse side regions at each end of said longitudinal sides being disposed substantially in the same transverse plane normal to said longitudinal sides at each end of said longitudinal sides, the height of said member being substantially greater than said width thereof; outer ones of said springs being so mounted on said outer border of said frame as to tend to slant outwardly of said frame; and a cover over said springs and attached to said frame and pulled tautly against said outer ones of said springs and bending said outer ones of said springs in the direction of said inner portion of said frame.
Claim 6
Dependent Claim
234 words
A spring support comprising: a frame having an outer border and an inner portion; a plurality of springs mounted on said frame, each spring comprising a plastic member of substantially constant width having symmetrical half portions with a pair of approximately parallel longitudinal sides, each half portion having a bounding transverse side region and a central transverse side region at each end of each longitudinal side, said central transverse side regions joining said bounding transverse side regions and said transverse side regions joining said longitudinal sides, said curved portions of said central transverse side regions being more closely disposed than said curved portions of said bounding transverse side regions at opposite ends of said longitudinal sides in the absence of stress on each spring, the outermost portions of said transverse side regions at each end of said longitudinal sides being disposed substantially in the same transverse plane normal to said longitudinal sides at each end of said longitudinal sides, the height of said member being substantially greater than said width thereof; outer ones of said springs being so mounted on said outer border of said frame as to tend to slant outwardly of said frame; and a cover over said springs and attached to said frame and pulled tautly against said outer ones of said springs and bending said outer ones of said springs in the direction of said inner portion of said frame.
Claim 7
Dependent Claim
42 words
A spring support in accordance with claim 4 in which said outer ones of said springs are so mounted on said outer border of said frame as to tend to slant outwardly of said frame at an angle of approximately 14* .
Claim 8
Dependent Claim
221 words
A spring support comprising: a frame having an outer border and an inner portion; a plurality of springs mounted on said frame, each comprising a plastic member of substantially constant width having symmetrical half portions with a pair of approximately parallel longitudinal sides, each half portion having a bounding transverse side region and a central transverse side region at each end of each longitudinal side, said central and bounding transverse side regions having curved portions, said central transverse side regions joining said bounding transverse side regions and said transverse side regions joining said longitudinal sides, said curved portions of said central transverse side regions being more closely disposed than said curved portions Of said bounding transverse side regions at opposite ends of said longitudinal sides in the absence of stress on each spring, the outermost portions of said transverse side regions at each end of said longitudinal sides being disposed substantially in the same transverse plane normal to said longitudinal sides at each end of said longitudinal sides, the height of said member being substantially greater than said width thereof; outer ones of said springs being mounted on said outer border of said frame and being more closely spaced than those of said springs mounted on said inner portion of said frame to strengthen said spring support at the edges thereof.
Claim 9
Dependent Claim
221 words
A spring support comprising: a frame having an outer border and an inner portion; a plurality of springs mounted on said frame, each comprising a plastic member of substantially constant width having symmetrical half portions with a pair of approximately parallel longitudinal sides, each half portion having a bounding transverse side region and a central transverse side region at each end of each longitudinal side, said central and bounding transverse side regions having curved portions, said central transverse side regions joining said bounding transverse side regions and said transverse side regions joining said longitudinal sides, said curved portions of said central transverse side regions being more closely disposed than said curved portions Of said bounding transverse side regions at opposite ends of said longitudinal sides in the absence of stress on each spring, the outermost portions of said transverse side regions at each end of said longitudinal sides being disposed substantially in the same transverse plane normal to said longitudinal sides at each end of said longitudinal sides, the height of said member being substantially greater than said width thereof; outer ones of said springs being mounted on said outer border of said frame and being more closely spaced than those of said springs mounted on said inner portion of said frame to strengthen said spring support at the edges thereof.
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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) | 1975-01-31 | 1975-08-02 | 1976-02-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-31 | 1979-08-02 | 1980-02-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-31 | 1983-08-02 | 1984-02-01 | $7700.00 | Window Closed / Lapsed |