Patent US4386542A successfully refreshed from Google Patents.
US4386542A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gripping tool
Assignee: Individual
•
Filing: 1980-09-22
•
Granted: 1983-06-07
•
Expires: 2000-09-22
Abstract
Abstract A locking plier type of device which is provided with very large gripping jaw surfaces movable into face to face apposition, with each being provided with arcuately curved rows of arcuate teeth or serrations which interfit with one another when the jaws are brought together. The arcuate teeth or serrations are angled so that oppositely directed pulls on the tool and the sheet metal clamped between the jaws of the tool tends to cause the serrations to penetrate slightly into the surface of the sheet metal to thereby increase the grip of the tool on the sheet metal. Platen type jaws on the order of an inch and three eighths to an inch and a half square produce quite satisfactory results and permit the exertion of very strong pulling forces on sheet metal panels of substantial size.
Inventors
- 👤 Louis R. Verna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:29
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
153 words
A plier type gripping tool comprising in combination, (a) a first tool arm having rigidly secured to one end a first gripping platen having a free end, (b) a second tool arm having rigidly secured to one end a second gripping platen having a free end, (c) means interconnecting said first and second tool arms so that said first and second gripping platens are swingable with respect to one another between a spaced apart condition and an apposed condition in which the gripping faces of said platens are in planer apposed and contactable relationship with one another with the said free ends of said platens defining one end of said gripping tool, (d) a plurality of arcuate teeth or serrations on each of said platens, the centers of curvature of at least some of said teeth or serrations on each said platen being located in front of the free end of said platen.
Claim 2
Dependent Claim
153 words
A plier type gripping tool comprising in combination, (a) a first tool arm having rigidly secured to one end a first gripping platen having a free end, (b) a second tool arm having rigidly secured to one end a second gripping platen having a free end, (c) means interconnecting said first and second tool arms so that said first and second gripping platens are swingable with respect to one another between a spaced apart condition and an apposed condition in which the gripping faces of said platens are in planer apposed and contactable relationship with one another with the said free ends of said platens defining one end of said gripping tool, (d) a plurality of arcuate teeth or serrations on each of said platens, the centers of curvature of at least some of said teeth or serrations on each said platen being located in front of the free end of said platen.
Claim 3
Dependent Claim
24 words
A gripping tool as described in claim 1 wherein said plurality of arcuate teeth on each of said platens are parallel to one another.
Claim 4
Dependent Claim
48 words
A gripping tool as described in claim 1 wherein said plurality of arcuate teeth on each of said platens are parallel to one another, and the successive spacing of the teeth on one platen is the same as the successive spacing of the teeth on the other platen.
Claim 5
Dependent Claim
38 words
A gripping tool as described in claim 1 wherein at least some of said arcuate teeth on each said platen are set at an angle so as to point away from the said free end of said platen.
Claim 6
Dependent Claim
28 words
A gripping tool as described in claim 1, 2, 3 or 4 wherein each of said plurality of arcuate teeth is continuous across the face of said platen.
Claim 7
Dependent Claim
49 words
A gripping tool as described in claim 1, 2, 3 or 4 wherein said plurality of arcuate teeth on one of said platens internest with said plurality of arcuate teeth on the other of said platens when said platens are in said opposed and contactable relationship with one another.
Claim 8
Dependent Claim
45 words
A gripping tool as described in claim 5 wherein said plurality of arcuate teeth on one of said platens internest with said plurality of arcuate teeth on the other of said platens when said platens are in said opposed and contactable relationship with one another.
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) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |