US3933346A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping or gripping devices
Assignee: Carver and Co Engineers Ltd
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Filing: 1974-04-01
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Granted: 1976-01-20
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Expires: 1994-04-01
Abstract
Abstract A clamping or gripping device comprises a handle by which the device can be held in one hand to position it relatively to the work, a carrier mounted or mountable on the handle, or on a part on the handle, a first jaw carried by the handle, and a second jaw pivotally mounted on the carrier. The carrier is movable along the handle, or along a part on the handle, to move the second jaw bodily towards and away from the first jaw; and there is pivotally mounted on the carrier a lever so arranged that, when the device is being held by the handle in one hand to position it relatively to the work, the lever is movable by the same hand, as that which is holding the handle, in a direction towards the handle to cause leverage to be exerted on the second jaw to cause clamping or gripping pressure to be applied, against the work, in the direction of the first jaw.
Inventors
- 👤 Leonard John Carver
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 08:48
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/14; B25B7/16; B25B5/00; B25B5/06; B25B5/08
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
362 words
A clamping or gripping device comprising: a a handle including an elongated shaft for holding the device in one hand to position it relatively to work to be clamped or gripped; b a first elongated jaw mounted on said handle and extending in a direction transverse to said shaft; c a carrier slidably mounted on said shaft for movement towards and away from said first jaw, said carrier having a portion thereof in contact with one side of said shaft; d frictional resistance means on said carrier and in sliding contact with said shaft to retain said carrier against movement along said shaft under the influence of gravity; e a second elongated jaw having a radiused inner end; f means mounting said second jaw on said carrier for pivotal movement about an axis and at a position such that the surface of the radiused inner end thereof abuts the side of said shaft, opposite said one side; g a lever pivotally mounted on said carrier and having a cam edge face; h a thrust block interposed between said cam edge face and said second jaw, said block having a curved face engaging the surface of said cam face and a face slidingly engaging a surface of said second jaw at the side of said pivot axis opposite said radiused inner end; and i means biasing said second jaw towards said lever; j said lever being arranged such that when the device is held by said handle in one hand to position it relatively to the work, said lever is movable by said one hand from an inoperative position in a direction towards said shaft to cause leverage to be exerted, by cam action between said cam edge face and said thrust block against said biasing means, on said second jaw to cause clamping or gripping pressure to be applied against the work in the direction of said first jaw and said portion of said carrier and said radiused inner end of said second jaw to jam against said opposite sides of said shaft, respectively, whereby the carrier cannot be displaced along the shaft until said lever is returned to said inoperative position.
Claim 2
Dependent Claim
362 words
A clamping or gripping device comprising: a a handle including an elongated shaft for holding the device in one hand to position it relatively to work to be clamped or gripped; b a first elongated jaw mounted on said handle and extending in a direction transverse to said shaft; c a carrier slidably mounted on said shaft for movement towards and away from said first jaw, said carrier having a portion thereof in contact with one side of said shaft; d frictional resistance means on said carrier and in sliding contact with said shaft to retain said carrier against movement along said shaft under the influence of gravity; e a second elongated jaw having a radiused inner end; f means mounting said second jaw on said carrier for pivotal movement about an axis and at a position such that the surface of the radiused inner end thereof abuts the side of said shaft, opposite said one side; g a lever pivotally mounted on said carrier and having a cam edge face; h a thrust block interposed between said cam edge face and said second jaw, said block having a curved face engaging the surface of said cam face and a face slidingly engaging a surface of said second jaw at the side of said pivot axis opposite said radiused inner end; and i means biasing said second jaw towards said lever; j said lever being arranged such that when the device is held by said handle in one hand to position it relatively to the work, said lever is movable by said one hand from an inoperative position in a direction towards said shaft to cause leverage to be exerted, by cam action between said cam edge face and said thrust block against said biasing means, on said second jaw to cause clamping or gripping pressure to be applied against the work in the direction of said first jaw and said portion of said carrier and said radiused inner end of said second jaw to jam against said opposite sides of said shaft, respectively, whereby the carrier cannot be displaced along the shaft until said lever is returned to said inoperative position.
Claim 3
Dependent Claim
38 words
A clamping or gripping device according to claim 1 wherein said biasing means is a resilient pressure pad arranged to be compressed by said second jaw as said lever is pivoted and applies leverage to said second jaw.
Claim 4
Dependent Claim
27 words
A clamping or gripping device according to claim 1 wherein said frictional resistance means is a plastic element mounted on said carrier and frictionally engaging said shaft.
Claim 5
Dependent Claim
20 words
A clamping or gripping device according to claim 1 wherein said first jaw is an integral extension of said handle.
Claim 6
Dependent Claim
55 words
A clamping or gripping device according to claim 1 further comprising a terminal part pivotally mounted on each of said first and second jaws for engaging the work to be clamped or gripped, said pivoted terminal parts being angularly movable relative to the respective jaws whereby they are capable of self-alignment relatively to the work.
Claim 7
Dependent Claim
17 words
A clamping or gripping device according to claim 5 wherein said terminal parts are of low-friction material.
Claim 8
Dependent Claim
29 words
A clamping or gripping device according to claim 1 wherein at least the cam edge face of said lever is of zinc and said thrust block is of aluminum.
Claim 9
Dependent Claim
272 words
A clamping or gripping device, comprising: a a bar; b a carrier slidably mounted on said bar, said carrier having a portion thereof in contact with one side of said bar; c frictional resistance means on said carrier and in sliding contact with said bar to retain said carrier against movement along said bar under the influence of gravity; d an elongated jaw having a radiused inner end; e means mounting said jaw on said carrier for pivotal movement about an axis and at a position such that the surface of the radiused inner end thereof abuts the side of said bar, opposite said one side; f a lever pivotally mounted on said carrier and having a cam edge face; g a thrust block interposed between said cam edge face and said jaw, said block having a curved face engaging the surface of said cam face and a face slidingly engaging a surface of said jaw at the side of said pivot axis, opposite said radiused inner end; and h means biasing said jaw towards said lever; i said lever being movable from an inoperative position in a direction towards said bar to cause leverage to be exerted, by cam action between said cam edge face and said thrust block against said biasing means, on said jaw to cause clamping or gripping pressure to be applied against the work and said portion of said carrier and said radiused inner end of said second jaw to jam against said opposite sides of said bar, respectively, whereby the carrier cannot be displaced along the bar until such lever is returned to said inoperative position.
Claim 10
Dependent Claim
272 words
A clamping or gripping device, comprising: a a bar; b a carrier slidably mounted on said bar, said carrier having a portion thereof in contact with one side of said bar; c frictional resistance means on said carrier and in sliding contact with said bar to retain said carrier against movement along said bar under the influence of gravity; d an elongated jaw having a radiused inner end; e means mounting said jaw on said carrier for pivotal movement about an axis and at a position such that the surface of the radiused inner end thereof abuts the side of said bar, opposite said one side; f a lever pivotally mounted on said carrier and having a cam edge face; g a thrust block interposed between said cam edge face and said jaw, said block having a curved face engaging the surface of said cam face and a face slidingly engaging a surface of said jaw at the side of said pivot axis, opposite said radiused inner end; and h means biasing said jaw towards said lever; i said lever being movable from an inoperative position in a direction towards said bar to cause leverage to be exerted, by cam action between said cam edge face and said thrust block against said biasing means, on said jaw to cause clamping or gripping pressure to be applied against the work and said portion of said carrier and said radiused inner end of said second jaw to jam against said opposite sides of said bar, respectively, whereby the carrier cannot be displaced along the bar until such lever is returned to said inoperative position.
Claim 11
Dependent Claim
335 words
A clamping or gripping device, comprising: a a bar; b a pair of carriers slidably mounted on said bar, each said carrier having a portion thereof in contact with one side of said bar; c frictional resistance means on each said carrier and in sliding contact with said bar to retain each said carrier against movement along said bar under the influence of gravity; d a pair of elongated jaws, each having a radiused inner end; e means mounting one of said jaws on each of said carriers for pivotal movement about an axis and at a position such that the surface of the radiused inner end thereof abuts the side of said bar, opposite said one side; f said bar being slidably engaged at one side by said radiused inner end of each of said jaws and at the side opposite said one side by a pair of each of said carriers; g a pair of levers, each pivotally mounted on one of said carriers and having a cam edge face; h a pair of thrust blocks, each interposed between said cam edge face and said jaw on one of said carriers and having a curved face engaging the surface of said cam face and a face slidingly engaging a surface of said jaw at the side of the pivot axis opposite said radiused inner end; and i. means on each carrier biasing said jaw towards said lever, j. each said lever being movable from an inoperative position in a direction towards said bar to cause leverage to be exerted, by cam action between said cam edge face and said thrust block against said biasing means, on said jaw to cause clamping or gripping pressure to be applied against the work and said portion of said carrier and said radiused inner end of said second jaw to jam against said opposite sides of said bar, respectively, whereby the carrier cannot be displaced along the bar until such lever is returned to said inoperative position.
Claim 12
Dependent Claim
335 words
A clamping or gripping device, comprising: a a bar; b a pair of carriers slidably mounted on said bar, each said carrier having a portion thereof in contact with one side of said bar; c frictional resistance means on each said carrier and in sliding contact with said bar to retain each said carrier against movement along said bar under the influence of gravity; d a pair of elongated jaws, each having a radiused inner end; e means mounting one of said jaws on each of said carriers for pivotal movement about an axis and at a position such that the surface of the radiused inner end thereof abuts the side of said bar, opposite said one side; f said bar being slidably engaged at one side by said radiused inner end of each of said jaws and at the side opposite said one side by a pair of each of said carriers; g a pair of levers, each pivotally mounted on one of said carriers and having a cam edge face; h a pair of thrust blocks, each interposed between said cam edge face and said jaw on one of said carriers and having a curved face engaging the surface of said cam face and a face slidingly engaging a surface of said jaw at the side of the pivot axis opposite said radiused inner end; and i. means on each carrier biasing said jaw towards said lever, j. each said lever being movable from an inoperative position in a direction towards said bar to cause leverage to be exerted, by cam action between said cam edge face and said thrust block against said biasing means, on said jaw to cause clamping or gripping pressure to be applied against the work and said portion of said carrier and said radiused inner end of said second jaw to jam against said opposite sides of said bar, respectively, whereby the carrier cannot be displaced along the bar until such lever is returned to said inoperative position.
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) | 1979-01-19 | 1979-07-21 | 1980-01-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-01-19 | 1983-07-21 | 1984-01-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-01-19 | 1987-07-21 | 1988-01-20 | $7700.00 | Window Closed / Lapsed |