US4524648A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fixation tweezers
Assignee: Individual
•
Filing: 1984-08-17
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Granted: 1985-06-25
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Expires: 2004-08-17
Abstract
Abstract A pair of tweezers for gripping a workpiece in fixed position without exerting pressure by use of the thumb and index finger, having a fixed handle and a movable handle riveted at one end thereof and capable of gripping things on the other end, a spring-controlled member is pivotally mounted between the two handles, when pulling the member against the resistance offered by a expansion spring, the member can be pivotally rotated to a position where a pair of handles are forced open, permitting the gripping of the workpiece, after releasing the pulling force, the spring-controlled member will return to a normal closed position to grip the workpiece firmly.
Inventors
- 👤 Charng J. Chung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:52
CPC Classifications
B; B25; B25B; B25B9/00; B25B9/02
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
173 words
A fixation tweezers comprising: a fixed handle having a first front end defining a first grasping jaw with straight working surface and a first rear end; a movable handle including a second front end defining a second grasping jaw having working surface parallel with that of said first grasping jaw and a second rear end fixed with said first rear end; a spring member having a first end and a second end secured on said fixed handle; a controlling member disposed between said movable handle and said fixed handle, with one end thereof pivotably mounted to said movable handle and the other end connected with said first end of said spring member, being made with a configuration capable of being rotated pivotably against the biassing of said spring to achieve an open position, where said first and second grasping jaws being spaced apart and permitting a workpiece to be gripped therebetween, and when releasing, said controlling member returning to a closed position, where said first and second grasping jaws clamping against the workpiece.
Claim 2
Dependent Claim
173 words
A fixation tweezers comprising: a fixed handle having a first front end defining a first grasping jaw with straight working surface and a first rear end; a movable handle including a second front end defining a second grasping jaw having working surface parallel with that of said first grasping jaw and a second rear end fixed with said first rear end; a spring member having a first end and a second end secured on said fixed handle; a controlling member disposed between said movable handle and said fixed handle, with one end thereof pivotably mounted to said movable handle and the other end connected with said first end of said spring member, being made with a configuration capable of being rotated pivotably against the biassing of said spring to achieve an open position, where said first and second grasping jaws being spaced apart and permitting a workpiece to be gripped therebetween, and when releasing, said controlling member returning to a closed position, where said first and second grasping jaws clamping against the workpiece.
Claim 3
Dependent Claim
105 words
A fixation tweezers as claimed in claim 1, wherein said controlling member is a flat piece having a length longer than that of the spacing between said fixed handle and said movable handle, and normally it is tilted between said first and second grasping jaws under the biassing of said spring, said controlling member can be turned vertically between said fixed and movable handles to space apart said first and second grasping jaws and permitting a workpiece inserted therebetween, when the turning force is released, said controlling member returning to the tilted position and thus the workpiece between said grasping jaws can be gripped firmly.
Claim 4
Dependent Claim
45 words
A fixation tweezers as claimed in claim 1 or Claim 2, further comprising a push bar, which is associated with said controlling member and capable of protruding beyond said first and second grasping jaws when said controlling member is turned to open said grasping jaws.
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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |