US3567088A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for shearing rigid wall tubes
Assignee: Colorado Manufacturing Corp
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Filing: 1969-06-24
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Granted: 1971-03-02
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Expires: 1989-06-24
Abstract
Abstract A method and apparatus for shearing or breaking a metal tube or the like by confining and supporting the tube on both its inner and outer surfaces and on either side of a given shear plane, and then applying a shear force to the supported tube sufficient to break it transversely along the shear plane.
Inventors
- 👤 George L Andersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:35
CPC Classifications
B; B23; B23D; B23D21/00; B23D21/14; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/371; Y10T83/00; Y10T83/04; Y10T83/0596; Y10T83/263; Y10T83/384; Y10T83/395; Y10T83/404; Y10T83/412
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
127 words
In a machine for shearing a rigid wall tube: a. a pair of closely adjacent, relatively slidable members having openings therein arranged normally in relative axiAl alignment and shaped to closely fit the outer wall surfaces of a tube inserted in said openings; b. means for plugging and supporting the inner wall surface of such a tube comprising a pair of outwardly expansible, hydraulic barriers movable axially within such tube and operable to define therein a hydraulic pressure chamber within the region of said members; and c. means connected with one of said members for sliding it relative to the other of said members in a plane transverse to the axes of said openings and for a distance sufficient to shear a tube inserted in said openings.
Claim 2
Dependent Claim
127 words
In a machine for shearing a rigid wall tube: a. a pair of closely adjacent, relatively slidable members having openings therein arranged normally in relative axiAl alignment and shaped to closely fit the outer wall surfaces of a tube inserted in said openings; b. means for plugging and supporting the inner wall surface of such a tube comprising a pair of outwardly expansible, hydraulic barriers movable axially within such tube and operable to define therein a hydraulic pressure chamber within the region of said members; and c. means connected with one of said members for sliding it relative to the other of said members in a plane transverse to the axes of said openings and for a distance sufficient to shear a tube inserted in said openings.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |