US4601221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Clamping device for rectangular workpiece
Assignee: ABB Inc USA
•
Filing: 1984-11-09
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Granted: 1986-07-22
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Expires: 2004-11-09
Abstract
Abstract A clamping device for rectangular configurations characterized by two opposed jaws each having right-angled jaw portions and each pivotally mounted on separate support means for movement to and from each other so that the jaws form rectangular openings with self-adjusting aspect ratio for holding a rectangular workpiece.
Inventors
- 👤 Ralph W. Kalkbrenner
- 👤 Hans E. Leumann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:16
CPC Classifications
B; B25; B25B; B25B7/00; B25B7/12; B25B7/123; B25B7/02
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
71 words
A clamping device for holding a workpiece of rectangular configuration along its entire perimeter, comprising: (a) two opposed L-shaped jaws with each jaw pivotally mounted and including a pair of jaw portions extending perpendicular to each other forming rectangular openings between oppositely-facing jaws so as to automatically orient to the rectangular shape of a workpiece; and (b) support means separately supporting the jaws pivotally for movement to and from each other.
Claim 2
Dependent Claim
71 words
A clamping device for holding a workpiece of rectangular configuration along its entire perimeter, comprising: (a) two opposed L-shaped jaws with each jaw pivotally mounted and including a pair of jaw portions extending perpendicular to each other forming rectangular openings between oppositely-facing jaws so as to automatically orient to the rectangular shape of a workpiece; and (b) support means separately supporting the jaws pivotally for movement to and from each other.
Claim 3
Dependent Claim
18 words
The clamping device of claim 1 in which the support means comprise a pair of tongs pivotally connected.
Claim 4
Dependent Claim
21 words
The clamping device of claim 2 in which one portion of each pair of jaw portions is shorter than the other.
Claim 5
Dependent Claim
20 words
The clamping device of claim 3 in which the longer portions of the jaws are parallel when gripping a workpiece.
Claim 6
Dependent Claim
40 words
The clamping device of claim 4 in which one of the jaw portions is slotted to comprise spaced longitudinal prongs of each jaw portion and the other jaw portion is removable between the prongs as the tongs grip a workpiece.
Claim 7
Dependent Claim
15 words
The clamping device of claim 5 in which the longer jaw portions comprise the slot.
Claim 8
Dependent Claim
20 words
The clamping device of claim 6 in which each jaw comprises a notch in which the corresponding tong is disposed.
References Cited (Backward Citations)
US985086A
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US1321208A
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US743593A
Cited
US1334965A
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US1353719A
Cited
US3133461A
Cited
US3931671A
Cited
US4174847A
Cited
US4378937A
Cited
US4373373A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-07-21 | 1990-01-20 | 1990-07-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-07-21 | 1994-01-20 | 1994-07-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-07-21 | 1998-01-20 | 1998-07-22 | $7700.00 | Window Closed / Lapsed |