US4135626A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Constant force spring expandable clasp-holder
Assignee: Individual
•
Filing: 1976-09-17
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Granted: 1979-01-23
•
Expires: 1996-09-17
Abstract
Abstract The specification discloses a holding device which applies a constant force to the objects held regardless of their size or number. All embodiments utilize a constant force spring which is coiled at opposite ends.
Inventors
- 👤 Robert N. Cawood
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:30
CPC Classifications
A; A47; A47B; A47B65/00; A47B65/20; A47B65/10; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44769; Y10T24/44778; Y10T24/44803
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
162 words
A holding device comprising a constant force spring coiled at opposite ends to form two free coils, left and right plates interposed between the coiled ends of said spring and freely movable along said spring in opposite directions from a point intermediate the opposite ends of said spring with said left and right hand plates in direct abutment with one another to a point adjacent said ends of said spring, and normally urged toward one another by said coiled ends, base means attached to each plate in a manner permitting the spring to pass through the joint between each plate and its base whereby said left and right plates are held generally in parallel relationship transverse to the portion of said spring which passes between them, a stop attached to the center of said spring and said base means containing indentations to accommodate said stop in a manner permitting said device to close with no gap between said left and right plates.
Claim 2
Dependent Claim
162 words
A holding device comprising a constant force spring coiled at opposite ends to form two free coils, left and right plates interposed between the coiled ends of said spring and freely movable along said spring in opposite directions from a point intermediate the opposite ends of said spring with said left and right hand plates in direct abutment with one another to a point adjacent said ends of said spring, and normally urged toward one another by said coiled ends, base means attached to each plate in a manner permitting the spring to pass through the joint between each plate and its base whereby said left and right plates are held generally in parallel relationship transverse to the portion of said spring which passes between them, a stop attached to the center of said spring and said base means containing indentations to accommodate said stop in a manner permitting said device to close with no gap between said left and right plates.
Claim 3
Dependent Claim
173 words
A holding device comprising a constant force spring coiled at opposite ends to form two free coils, left and right plates interposed between the coiled ends of said spring and freely movable along said spring in opposite directions from a point intermediate the opposite ends of said spring with said left and right hand plates in direct abutment with one another to a point adjacent said ends of said spring, and normally urged toward one another by said coiled ends, base means attached to each plate in a manner permitting the spring to pass through the joint between each plate and its base whereby said left and right plates are held generally in parallel relationship transverse to the portion of said spring which passes between them, support means attached between each plate and its corresponding base means, a stop attached to the center of said spring and said base means containing indentations to accommodate said stop in a manner permitting said device to close with no gap between said left and right plates.
Claim 4
Dependent Claim
173 words
A holding device comprising a constant force spring coiled at opposite ends to form two free coils, left and right plates interposed between the coiled ends of said spring and freely movable along said spring in opposite directions from a point intermediate the opposite ends of said spring with said left and right hand plates in direct abutment with one another to a point adjacent said ends of said spring, and normally urged toward one another by said coiled ends, base means attached to each plate in a manner permitting the spring to pass through the joint between each plate and its base whereby said left and right plates are held generally in parallel relationship transverse to the portion of said spring which passes between them, support means attached between each plate and its corresponding base means, a stop attached to the center of said spring and said base means containing indentations to accommodate said stop in a manner permitting said device to close with no gap between said left and right plates.
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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) | 1982-01-22 | 1982-07-24 | 1983-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-01-22 | 1986-07-24 | 1987-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-01-22 | 1990-07-24 | 1991-01-23 | $7700.00 | Window Closed / Lapsed |