US4299030A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hand-operated shearing devices
Assignee: Individual
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Filing: 1979-12-26
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Granted: 1981-11-10
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Expires: 1999-12-26
Abstract
Abstract Spring scissors are provided in which, in addition to the resilient means which provide jaw-opening bias, lateral-urging means are provided, which act on the handles of the scissors to produce or mechanically augment the cross-cutting pressure between the blades.
Inventors
- 👤 David W. Vickers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 16:07
CPC Classifications
B; B26; B26B; B26B13/00; B26B13/12; B26B13/14; B26B13/16; B26B13/28; B26B13/285
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
A hand-operated shearing device which comprises a pair of members interconnected by pivot means located between a blade-portion and a handle-portion of each member, said pivot means permitting relative rotation of said members between an open-jaw configuration and a closed configuration, and resilient lateral-urging means effective throughout the range of rotational movement of said members to urge a surface of each of said blade-portions into frictional contact with a surface of the other blade-portion; wherein the improvement comprises a leaf-spring assembly interconnecting the ends of said handle-portions and adapted to constitute both said jaw-opening means and said lateral-urging means, said assembly comprising a pair of leaf-springs, one end of each leaf-spring being attached to an extremity of a respective one of said handle-portions, and a screw-threaded axle interconnecting the other ends of said leaf-springs, said axle being located parallel to said axis of rotation of said members and threadably engaging at least one of said leaf-springs, whereby upon rotation of said axle said other ends of said leaf-springs are displaced relative to one another along said axle.
Claim 2
Dependent Claim
177 words
A hand-operated shearing device which comprises a pair of members interconnected by pivot means located between a blade-portion and a handle-portion of each member, said pivot means permitting relative rotation of said members between an open-jaw configuration and a closed configuration, and resilient lateral-urging means effective throughout the range of rotational movement of said members to urge a surface of each of said blade-portions into frictional contact with a surface of the other blade-portion; wherein the improvement comprises a leaf-spring assembly interconnecting the ends of said handle-portions and adapted to constitute both said jaw-opening means and said lateral-urging means, said assembly comprising a pair of leaf-springs, one end of each leaf-spring being attached to an extremity of a respective one of said handle-portions, and a screw-threaded axle interconnecting the other ends of said leaf-springs, said axle being located parallel to said axis of rotation of said members and threadably engaging at least one of said leaf-springs, whereby upon rotation of said axle said other ends of said leaf-springs are displaced relative to one another along said axle.
Claim 3
Dependent Claim
41 words
A device in accordance with claim 1, including an adjusting wheel fixed to the axle and rotatable therewith, whereby through manual rotation of said wheel by an operator of the device, the lateral-urging force exerted by the leaf-springs is selectively adjustable.
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) | 1984-11-09 | 1985-05-11 | 1985-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-11-09 | 1989-05-11 | 1989-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-11-09 | 1993-05-11 | 1993-11-10 | $7700.00 | Window Closed / Lapsed |