Patent US3879025A successfully refreshed from Google Patents.
US3879025A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flat element spring
Assignee: United States Department of the Army
•
Filing: 1973-11-06
•
Granted: 1975-04-22
•
Expires: 1993-11-06
Abstract
Abstract A long travel spring which takes up small volume in storage. The spring is formed of a pair of heat treated metal strips provided with substantially an ogee configuration. The strips are secured together at one of their ends with the other of their ends free for spring action. The spring elements may be combined in many configurations, utilizing a plurality of the spring elements.
Inventors
- 👤 Paul A Dillard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 06:53
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
161 words
A spring comprising a plurality of spring elements, each element including a pair of leaves having corresponding ends secured together, each leaf having an intermediate portion and a free end, said intermediate portions disposed in angular relation with respect to one another and extending in the same direction away from the secured ends, said free ends disposed in substantially parallel relation for spring action therebetween, a first pair of said plurality of spring elements disposed in stacked relation, a first free end of the first of said first pair of spring elements secured to a first free end of the second of said first pair of spring elements, the second free ends of each said spring element disposed for spring action therebetween; and a second pair of spring elements disposed in stacked relation, the free ends of the first of said second pair of spring elements secured to the free ends of the second of said second pair of spring elements.
Claim 2
Dependent Claim
161 words
A spring comprising a plurality of spring elements, each element including a pair of leaves having corresponding ends secured together, each leaf having an intermediate portion and a free end, said intermediate portions disposed in angular relation with respect to one another and extending in the same direction away from the secured ends, said free ends disposed in substantially parallel relation for spring action therebetween, a first pair of said plurality of spring elements disposed in stacked relation, a first free end of the first of said first pair of spring elements secured to a first free end of the second of said first pair of spring elements, the second free ends of each said spring element disposed for spring action therebetween; and a second pair of spring elements disposed in stacked relation, the free ends of the first of said second pair of spring elements secured to the free ends of the second of said second pair of spring elements.
Claim 3
Dependent Claim
161 words
A spring comprising a plurality of spring elements, each element including a pair of leaves having corresponding ends secured together, each leaf having an intermediate portion and a free end, said intermediate portions disposed in angular relation with respect to one another and extending in the same direction away from the secured ends, said free ends disposed in substantially parallel relation for spring action therebetween, a first pair of said plurality of spring elements disposed in stacked relation, a first free end of the first of said first pair of spring elements secured to a first free end of the second of said first pair of spring elements, the second free ends of each said spring element disposed for spring action therebetween; and a second pair of spring elements disposed in stacked relation, the free ends of the first of said second pair of spring elements secured to the free ends of the second of said second pair of spring elements.
Claim 4
Dependent Claim
161 words
A spring comprising a plurality of spring elements, each element including a pair of leaves having corresponding ends secured together, each leaf having an intermediate portion and a free end, said intermediate portions disposed in angular relation with respect to one another and extending in the same direction away from the secured ends, said free ends disposed in substantially parallel relation for spring action therebetween, a first pair of said plurality of spring elements disposed in stacked relation, a first free end of the first of said first pair of spring elements secured to a first free end of the second of said first pair of spring elements, the second free ends of each said spring element disposed for spring action therebetween; and a second pair of spring elements disposed in stacked relation, the free ends of the first of said second pair of spring elements secured to the free ends of the second of said second pair of spring elements.
Claim 5
Dependent Claim
167 words
A spring comprising a plurality of spring elements, each element including a pair of leaves having corresponding ends secured together, each leaf having an intermediate portion and a free end, said intermediate portions disposed in angular relation with respect to one another and extending in the same direction away from the secured ends, said free ends disposed in substantially parallel relation for spring action therebetween, said spring including the first of three of said elements disposed in substantially equally spaced circular relationship, the first of said free ends of each of said first three elements secured to a first circular member, a second of three pairs of said elements disposed in substantially equally spaced circular relationship, the first of said free ends of each of said second three elements secured to said second circular element, a third circular disc having the second said free ends of each of said second three elements secured thereto, said circular members being mounted in substantially parallel relation for spring action therebetween.
Claim 6
Dependent Claim
167 words
A spring comprising a plurality of spring elements, each element including a pair of leaves having corresponding ends secured together, each leaf having an intermediate portion and a free end, said intermediate portions disposed in angular relation with respect to one another and extending in the same direction away from the secured ends, said free ends disposed in substantially parallel relation for spring action therebetween, said spring including the first of three of said elements disposed in substantially equally spaced circular relationship, the first of said free ends of each of said first three elements secured to a first circular member, a second of three pairs of said elements disposed in substantially equally spaced circular relationship, the first of said free ends of each of said second three elements secured to said second circular element, a third circular disc having the second said free ends of each of said second three elements secured thereto, said circular members being mounted in substantially parallel relation for spring action therebetween.
Claim 7
Dependent Claim
89 words
A spring disposed to yield axial and rotational motion comprising a pair of discs disposed in spaced parallel relation, a first plurality of leaf spring members having first and second ends, the first end secured in substantially equally spaced relation on the edge of the first of said pair of discs, a second plurality of leaf spring members having first and second ends, the first end secured in substantially equally spaced relation on the edge of said second disc, the second end of each spring member being secured together.
Claim 8
Dependent Claim
89 words
A spring disposed to yield axial and rotational motion comprising a pair of discs disposed in spaced parallel relation, a first plurality of leaf spring members having first and second ends, the first end secured in substantially equally spaced relation on the edge of the first of said pair of discs, a second plurality of leaf spring members having first and second ends, the first end secured in substantially equally spaced relation on the edge of said second disc, the second end of each spring member being secured together.
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) | 1978-04-21 | 1978-10-21 | 1979-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-21 | 1982-10-21 | 1983-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-21 | 1986-10-21 | 1987-04-22 | $7700.00 | Window Closed / Lapsed |