Patent US4256295A successfully refreshed from Google Patents.
US4256295A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Adjustable clamp
Assignee: ALSTON DAVID K SR (33-1/3% OWNERSHIP ENTIRE RIGHT TITLE AND INTEREST)
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Filing: 1980-04-03
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Granted: 1981-03-17
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Expires: 2000-04-03
Abstract
Abstract An adjustable clamp for holding a workpiece wherein the clamp is characterized by a pair of fixed, opposing jaws and a first clamping member movably disposed on one of said jaws. The adjustable clamp further comprises a second clamping member movably attached to a clamp positioning bar formed on the body of the adjustable clamp whereby the second clamping member may be selectively positioned in first and second clamping positions with respect to a normal plane between the jaws. A second embodiment for the adjustable clamp is disclosed comprising a third clamping member operatively mounted on the other jaw in substantially opposing relation to the first clamping member, whereby a workpiece may be centered between the two jaws.
Inventors
- 👤 Elmer A. Egner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 21:53
CPC Classifications
B; B25; B25B; B25B5/00; B25B5/003
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
101 words
An adjustable clamp for holding a workpiece, said clamp comprising: a body comprising a pair of spaced apart, permanently fixed jaws and a support piece disposed in interconnecting, substantially perpendicular relation between said jaws, said body further comprising a clamp positioning means fixed to said jaws; a first clamping member movably mounted on one of said jaws; a second clamping member movably mounted on said clamp positioning means, said second clamping member being selectively disposable on said clamp positioning means in at least first and second angular clamping positions with respect to an axis substantially parallel to the first clamping member.
Claim 2
Dependent Claim
101 words
An adjustable clamp for holding a workpiece, said clamp comprising: a body comprising a pair of spaced apart, permanently fixed jaws and a support piece disposed in interconnecting, substantially perpendicular relation between said jaws, said body further comprising a clamp positioning means fixed to said jaws; a first clamping member movably mounted on one of said jaws; a second clamping member movably mounted on said clamp positioning means, said second clamping member being selectively disposable on said clamp positioning means in at least first and second angular clamping positions with respect to an axis substantially parallel to the first clamping member.
Claim 3
Dependent Claim
26 words
An adjustable clamp as in claim 1 wherein each of said jaws comprise an interior face, each of said faces being substantially parallel to the other.
Claim 4
Dependent Claim
38 words
An adjustable clamp as in claim 2 wherein each of said jaws further comprise a ledge formed on a first end therefor, each of said ledges being substantially perpendicular to its corresponding interior face and extending outwardly therefrom.
Claim 5
Dependent Claim
32 words
An adjustable clamp as in claim 1 wherein said body further comprises an aperture formed through said one jaw, at least a portion of said first clamping member extending through said aperture.
Claim 6
Dependent Claim
29 words
An adjustable clamp as in claim 4 wherein said aperture is threaded and wherein said first clamping member comprises a correspondingly threaded first stem operatively mounted in said aperture.
Claim 7
Dependent Claim
22 words
An adjustable clamp as in claim 5 further comprising a reinforcing boss formed on said body in surrounding relation to said aperture.
Claim 8
Dependent Claim
74 words
An adjustable clamp as in claim 5 wherein said first clamping member further comprises a first abutment plate mounted on one end of said first stem, said one end being defined by the end of said first stem passing through said aperture toward said other jaw, and a first handle formed on the other end of said first stem, whereby the distance between said first abutment plate and said other jaw may be varied.
Claim 9
Dependent Claim
23 words
An adjustable clamp as in claim 7 wherein said first abutment plate is movably mounted on said one end of said first stem.
Claim 10
Dependent Claim
26 words
An adjustable clamp as in claim 7 wherein said first abutment plate comprises a substantially planar surface in opposed, substantially parallel relation to said other jaw.
Claim 11
Dependent Claim
17 words
An adjustable clamp as in claim 9 wherein the perimeter of said planar surface defines a circle.
Claim 12
Dependent Claim
17 words
An adjustable clamp as in claim 9 wherein the perimeter of said planar surface defines a quadrilateral.
Claim 13
Dependent Claim
57 words
An adjustable clamp as in claim 1 wherein said second clamping member comprises a second clamp arm, one end of said arm being disposed on said clamp positioning means, and a threaded aperture formed through the other end of said arm; said second clamping member further comprising a correspondingly threaded second stem operatively mounted in said aperture.
Claim 14
Dependent Claim
76 words
An adjustable clamp as in claim 12 wherein said second clamping member further comprises a second abutment plate mounted on one end of said second stem, said one end being defined by the end of said second stem passing through said aperture toward said clamp positioning means, and a second handle formed on the other end of said second stem, whereby the distance between said second abutment plate and said clamp positioning means may be varied.
Claim 15
Dependent Claim
23 words
An adjustable clamp as in claim 13 wherein said second abutment plate is movably mounted on said one end of said first stem.
Claim 16
Dependent Claim
30 words
An adjustable clamp as in claim 13 wherein said second abutment plate comprises a substantially planar second surface in substantially perpendicular relation to the longitudinal dimension of said second stem.
Claim 17
Dependent Claim
18 words
An adjustable clamp as in claim 15 wherein the perimeter of said planar second surface defines a circle.
Claim 18
Dependent Claim
42 words
An adjustable clamp as in claim 12 wherein said clamp positioning means comprises a bar of predetermined cross-sectional configuration along a major portion of its longitudinal dimension, one end of said bar being relieved so as to define a smaller cross-sectional configuration.
Claim 19
Dependent Claim
60 words
An adjustable clamp as in claim 17 wherein said one end of said arm comprises an arm aperture of predetermined cross-sectional configuration formed therethrough, whereby said arm may be movably mounted on said bar and whereby the angular relation between said arm and said body may be varied by positioning said arm aperture at said relieved end of said bar.
Claim 20
Dependent Claim
17 words
An adjustable clamp as in claim 18 wherein said second stem is substantially parallel to said arm.
Claim 21
Dependent Claim
27 words
An adjustable clamp as in claim 19 wherein said support piece comprises a notch formed therein in corresponding, opposed relation to said relieved end of said bar.
Claim 22
Dependent Claim
61 words
An adjustable clamp as in claim 19 wherein said arm is substantially L-shaped, said threaded aperture being formed through the shorter leg of said L in substantially parallel relation to the longer leg of said L, and said arm aperture being formed through the longer leg of said L in substantially perpendicular relation to the longitudinal dimension of the longer leg.
Claim 23
Dependent Claim
30 words
An adjustable clamp as in claim 1 further comprising a third clamping member movably mounted on the other of said jaws in substantially opposing relation to said first clamping member.
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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) | 1984-03-16 | 1984-09-15 | 1985-03-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-03-16 | 1988-09-15 | 1989-03-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-03-16 | 1992-09-15 | 1993-03-17 | $7700.00 | Window Closed / Lapsed |