US3576040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring cushion structures
Assignee: Leucadia Inc
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Filing: 1968-10-21
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Granted: 1971-04-27
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Expires: 1988-10-21
Abstract
Abstract An adhesive plastic net is used over a spring foundation both as a spring insulator and as a spring positioner, being adhered to the springs by the adhesive material of the net itself.
Inventors
- 👤 Ronald L Larsen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:18
CPC Classifications
A; A47; A47C; A47C27/00; A47C27/04; A47C27/045; A47C27/0453
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
125 words
A spring structure comprising a resilient metal wire spring foundation presenting a face having relatively large open spaces between a multiplicity of relatively small wires in said face, an open mesh plastic spring insulator net over said face, said net having a plurality of sets of flexible strands, each of said sets having the strands thereof substantially parallel, one of said sets of strands being arranged at an angle to a second set of said strands, at least a portion of said net being an adhesive, said net being secured to the wires of said foundation at points of contact therewith by the adhesive material of said net whereby said net is self-bonded to said foundation and serves as a spring insulator for said foundation.
Claim 2
Dependent Claim
125 words
A spring structure comprising a resilient metal wire spring foundation presenting a face having relatively large open spaces between a multiplicity of relatively small wires in said face, an open mesh plastic spring insulator net over said face, said net having a plurality of sets of flexible strands, each of said sets having the strands thereof substantially parallel, one of said sets of strands being arranged at an angle to a second set of said strands, at least a portion of said net being an adhesive, said net being secured to the wires of said foundation at points of contact therewith by the adhesive material of said net whereby said net is self-bonded to said foundation and serves as a spring insulator for said foundation.
Claim 3
Dependent Claim
44 words
The spring structure of claim 1 in which said net is an extruded neT, the material of said net is an extrudable plastic adhesive, and the points where the strands of said one set meet the strands of said second set form integral joints.
Claim 4
Dependent Claim
14 words
The spring structure of claim 1 in which said net is a woven net.
Claim 5
Dependent Claim
29 words
The spring structure of claim 2 in which the angle between the strands of said one set and the strands of said second set is substantially a right angle.
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) | 1974-04-26 | 1974-10-26 | 1975-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-26 | 1978-10-26 | 1979-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-26 | 1982-10-26 | 1983-04-27 | $7700.00 | Window Closed / Lapsed |