US3724837A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Retracting clamp
Assignee: Dover Corp
•
Filing: 1970-09-02
•
Granted: 1973-04-03
•
Expires: 1990-09-02
Abstract
Abstract A retracting clamp for firmly holding work pieces on the bed of a machine tool or the like and incorporating a clamping arm which pivotally releases and linearly retracts inside the body guided by a ball detent in the body which engages a groove in the clamping arm.
Inventors
- 👤 Pherson A Mc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 02:43
CPC Classifications
B; B25; B25B; B25B5/00; B25B5/06; B25B5/061; B25B5/064
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
117 words
A retracting clamp, comprising: a body, a first pivot means in said body, a clamping arm having an elongated slot formed therein and engaging said first pivot means, fluid pressure linear actuating means on said body and having a second pivot directly thereattached laterally spaced from said first pivot, said second pivot directly engaging an enlarged hole formed in said clamping arm, a substantially straight groove formed in said clamping arm and having a relatively short arcuate portion at one end thereof, and a ball detent in said body engaging said groove to provide for substantially linear reciprocably extension of said clamping arm followed by a pivotal clamping movement relative to a mounting surface for said body.
Claim 2
Dependent Claim
117 words
A retracting clamp, comprising: a body, a first pivot means in said body, a clamping arm having an elongated slot formed therein and engaging said first pivot means, fluid pressure linear actuating means on said body and having a second pivot directly thereattached laterally spaced from said first pivot, said second pivot directly engaging an enlarged hole formed in said clamping arm, a substantially straight groove formed in said clamping arm and having a relatively short arcuate portion at one end thereof, and a ball detent in said body engaging said groove to provide for substantially linear reciprocably extension of said clamping arm followed by a pivotal clamping movement relative to a mounting surface for said body.
Claim 3
Dependent Claim
24 words
The retracting clamp of claim 1 wherein the radial center of said arcuate portion substantially coincides with the axis of said first pivot means.
Claim 4
Dependent Claim
17 words
The retracting clamp of claim 1 wherein said clamping arm reciprocably retracts substantially inside of said body.
Claim 5
Dependent Claim
96 words
A retracting clamp, comprising: a body, a clamping arm, fluid pressure linear actuating means having a piston rod aligned with and pivotally connected directly to said clamping arm adapted to provide initial linear and final rocking movement to the clamping arm, a lost motion interconnecting means between the body and clamping arm laterally spaced from said linear actuating means providing for linear motion during said initial movement and a pivotal fulcrum during said rocking movement, one of said connections to said clamping arm including a clearance accommodating simultaneous straight line actuating and arcuate rocking arm movements.
Claim 6
Dependent Claim
96 words
A retracting clamp, comprising: a body, a clamping arm, fluid pressure linear actuating means having a piston rod aligned with and pivotally connected directly to said clamping arm adapted to provide initial linear and final rocking movement to the clamping arm, a lost motion interconnecting means between the body and clamping arm laterally spaced from said linear actuating means providing for linear motion during said initial movement and a pivotal fulcrum during said rocking movement, one of said connections to said clamping arm including a clearance accommodating simultaneous straight line actuating and arcuate rocking arm movements.
Claim 7
Dependent Claim
20 words
A retracting clamp as set forth in claim 4 wherein said lost motion means comprises interconnecting slot and pin means.
References Cited (Backward Citations)
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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) | 1976-04-02 | 1976-10-02 | 1977-04-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-02 | 1980-10-02 | 1981-04-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-02 | 1984-10-02 | 1985-04-03 | $7700.00 | Window Closed / Lapsed |