Patent US3881713A successfully refreshed from Google Patents.
US3881713A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocker spring unit
Assignee: Hickory Springs Manufacturing Co
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Filing: 1973-05-23
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Granted: 1975-05-06
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Expires: 1993-05-23
Abstract
Abstract A rocker spring unit having a top plate member with laterally projecting tab sections at its side edges for chair attachment and rocker spring seat-forming bosses at its front and rear edges is improved by providing the tab sections with at least one angled edge tapering from a widened reinforcing base therefor and by providing the rear bosses of the top plate member with inward and downward angled seat portions for straight line bottoming of the rocker springs.
Inventors
- 👤 T Bob Joyce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:58
CPC Classifications
A; A47; A47C; A47C3/00; A47C3/02; A47C3/025; A47C3/0252; F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
139 words
In a rocker spring unit comprising a top plate member having opposed depending side flanges, a bottom plate member having opposed upstanding side flanges extending into face-to-face relation to said top plate member side flanges, means pivotally connecting said top plate member side flanges to said bottom plate member side flanges at a centrally disposed horizontal pivot axis, rocker springs extended between and attached to said plate members, and bosses displaced in said plate members adjacent front and rear edge portions thereof to form attaching seats for said rocker springs, the improvement which comprises angled seat portions in said bosses adjacent said rear edge portion of said top plate member, said seat portions being angled downwardly and forwardly for straight line bottoming of the rocker springs attached thereto upon downward rocking of said top plate member rear edge portion.
Claim 2
Dependent Claim
139 words
In a rocker spring unit comprising a top plate member having opposed depending side flanges, a bottom plate member having opposed upstanding side flanges extending into face-to-face relation to said top plate member side flanges, means pivotally connecting said top plate member side flanges to said bottom plate member side flanges at a centrally disposed horizontal pivot axis, rocker springs extended between and attached to said plate members, and bosses displaced in said plate members adjacent front and rear edge portions thereof to form attaching seats for said rocker springs, the improvement which comprises angled seat portions in said bosses adjacent said rear edge portion of said top plate member, said seat portions being angled downwardly and forwardly for straight line bottoming of the rocker springs attached thereto upon downward rocking of said top plate member rear edge portion.
Claim 3
Dependent Claim
42 words
A rocker spring unit as defined in claim 1 and further characterized in that said downwardly and forwardly angled seat portions are disposed to be generally parallel with the corresponding bottom plate seat portions when the rocker springs therebetween are fully compressed.
Claim 4
Dependent Claim
34 words
A rocker spring unit as defined in claim 1 and further characterized in that said downwardly and forwardly angled seat portions are inclined approximately 10* degrees from the plane of said top plate member.
Claim 5
Dependent Claim
33 words
A rocker sprIng unit as defined in claim 1 and further characterized in that said plate members are rectangularly shaped and a boss is located closely adjacent each corner of said plate members.
Claim 6
Dependent Claim
61 words
A rocker spring unit as defined in claim 1 and further characterized in that said top plate member has apertured tab sections laterally projecting from side edge portions thereof for attachment of said unit to the seat portion of a chair structure, said tab sections having at least one angled edge for tapering of said sections from a widened reinforcing base.
Claim 7
Dependent Claim
35 words
A rocker spring unit as defined in claim 5 and further characterized in that said top plate member has embossed ribs extending into said widened reinforcing bases of said tab sections for additional reinforcement thereof.
Claim 8
Dependent Claim
27 words
A rocker spring unit as defined in claim 6 and further characterized in that said embossed ribs extend into said tab sections adjacent an angled edge thereof.
Claim 9
Dependent Claim
51 words
A rocker spring unit as defined in claim 7 and further characterized in that said top plate member is rectangularly shaped; in that said top plate member has a tab section located adjacent each corner of said top plate member; and in that said embossed ribs extend between said tab sections.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |