Patent US3590674A successfully refreshed from Google Patents.
US3590674A
Expired / Lapsed
US
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Restrained shearing method of bar material
Assignee: Individual
•
Filing: 1968-10-10
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Granted: 1971-07-06
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Expires: 1988-10-10
Abstract
Abstract Method of shearing bar material workpiece by holding the bar workpiece at positions adjacent to the point of shearing so as to restrain axial movement while pressure shearing by vertical movement against the axis of the workpiece.
Inventors
- 👤 Teizo Maeda
- 👤 Takeo Nakagawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 06:36
CPC Classifications
B; B23; B23D; B23D23/00; Y; Y10; Y10T; Y10T83/00; Y10T83/04; Y10T83/0405; Y10T83/748; Y10T83/7487; Y10T83/7493; Y10T83/75; Y10T83/7513; Y10T83/869; Y10T83/8772; Y10T83/8821; Y10T83/8828; Y10T83/8831; Y10T83/929; Y10T83/9411; Y10T83/9447
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A method of shearing bar material comprising the steps of placing one end of said bar workpiece against a rigid fixed abutment, applying a restraining force to an area of said workpiece normal to the longitudinal axis thereof but spaced from said abutment, said area of the workpiece resting on a fixed support with the force being applied to a pressure member serving to grip said workpiece against said fixed support to restrain axial movement thereof, and applying a shearing force to said workpiece between the abutment and said support and pressure member by means of a shearing member having a clearance between the abutment and the fixed support and pressure member of substantially zero.
Claim 2
Independent Claim
115 words
A method of shearing bar material comprising the steps of placing one end of said bar workpiece against a rigid fixed abutment, applying a restraining force to an area of said workpiece normal to the longitudinal axis thereof but spaced from said abutment, said area of the workpiece resting on a fixed support with the force being applied to a pressure member serving to grip said workpiece against said fixed support to restrain axial movement thereof, and applying a shearing force to said workpiece between the abutment and said support and pressure member by means of a shearing member having a clearance between the abutment and the fixed support and pressure member of substantially zero.
References Cited (Backward Citations)
US2039842A
Cited
US3082655A
Cited
US3039344A
Cited
US3204504A
Cited
US3252364A
Cited
US3451298A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-05 | 1975-01-04 | 1975-07-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-05 | 1979-01-04 | 1979-07-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-05 | 1983-01-04 | 1983-07-06 | $7700.00 | Window Closed / Lapsed |