Patent US4253218A successfully refreshed from Google Patents.
US4253218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spring loaded ascender
Assignee: Individual
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Filing: 1979-05-17
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Granted: 1981-03-03
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Expires: 1999-05-17
Abstract
Abstract A safety clamp appliance is disclosed formed of a cable or rope housing having opposed walls and a generally U-shaped cross-section, the housing interior being adapted to receive a safety rope, and a brake lever having a pivot point, a brake surface and a handle for attachment to a workman's belt. The brake lever is pivotally mounted in the housing. An actuating spring is provided for spring loading the brake lever, thereby maintaining a constant pressure by the brake surface on the rope. The actuating spring is provided with a quick release for converting the safety clamp appliance from a spring loaded mode to a non-spring loaded mode.
Inventors
- 👤 Peter E. Gibbs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:11
CPC Classifications
A; A62; A62B; A62B1/00; A62B1/06; A62B1/14; F; F16; F16G; F16G11/00; F16G11/10; F16G11/105; F16G11/106; A63; A63B; A63B29/00; A63B29/02; Y; Y10; Y10T; Y10T24/00; Y10T24/39; Y10T24/3936; Y10T24/394
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
122 words
A safety clamp appliance comprising a housing having parallel side walls and a U-shaped rear wall, said housing being longitudinally slidable on a safety rope, a brake lever means having a brake means end and a handle end with a pivot point intermediate the ends, an actuating spring means connected at one end to said handle end of said brake lever means and to said housing at the other end, said brake lever means being pivoted by said actuating spring means into constant engagement with the safety rope, and a disconnect means for disconnecting said actuating spring means from said housing thereby changing the safety clamp appliance from being spring loaded to being non-spring loaded, said disconnect means being a keeper ring.
Claim 2
Dependent Claim
122 words
A safety clamp appliance comprising a housing having parallel side walls and a U-shaped rear wall, said housing being longitudinally slidable on a safety rope, a brake lever means having a brake means end and a handle end with a pivot point intermediate the ends, an actuating spring means connected at one end to said handle end of said brake lever means and to said housing at the other end, said brake lever means being pivoted by said actuating spring means into constant engagement with the safety rope, and a disconnect means for disconnecting said actuating spring means from said housing thereby changing the safety clamp appliance from being spring loaded to being non-spring loaded, said disconnect means being a keeper ring.
Claim 3
Dependent Claim
49 words
A safety clamp appliance as in claim 1 wherein a holding spring means connected to said keeper ring and to said housing prevents said actuating spring means from accidental release from said housing, holds the keeper ring flat against the housing and ties the brake lever to the housing.
Claim 4
Dependent Claim
22 words
A safety clamp appliance as in claim 2 wherein said actuating spring means is connected to a post means on said housing.
Claim 5
Dependent Claim
20 words
A safety clamp appliance as in claim 3 wherein said brake means is a brake foot having a gripping surface.
References Cited (Backward Citations)
US1961081A
Cited
US3179994A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-03-02 | 1984-09-01 | 1985-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-02 | 1988-09-01 | 1989-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-02 | 1992-09-01 | 1993-03-03 | $7700.00 | Window Closed / Lapsed |