US4059036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shearing hollow stock
Assignee: TI Group Services Ltd
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Filing: 1976-07-06
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Granted: 1977-11-22
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Expires: 1996-07-06
Abstract
Abstract An internal member for supporting a hollow body during shearing in the form of a close-fitting solid body. The body comprises at least portions meeting in the shearing plane and each portion including at least one split ring having a single gap in its periphery to allow it to expand to fit the hollow body. Expansion may be effected by axial movement of frusto-conical plugs corresponding to and co-operating with frusto-conical inner surface in the rings. Each ring may either comprise a single component, preferably notched on its inner face to increase flexibility, or be in the form of a thin split cylindrical shell surrounding a plurality of inner segments.
Inventors
- 👤 John Edward Hartley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 02:45
CPC Classifications
B; B23; B23D; B23D21/00; B23D21/14; Y; Y10; Y10T; Y10T225/00; Y10T225/30; Y10T225/371; Y10T83/00; Y10T83/384; Y10T83/395
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
An assembly for shearing a hollow body comprising a pair of external shear blades, each of said shear blades having an aperture therein to receive said body, said blades meeting in a common shearing plane and being relatively movable in a direction parallel to said plane to shear said body, an internal shearing member lying within said apertures, said member comprising a first expandable portion lying on one side of said plane and a second expandable portion lying on the other side of said plane, said portions being independently movable and each of said portions comprising a circumferentially extending surface having therein only a single gap, and means for expanding said portions simultaneously to substantially fill a hollow body placed in said apertures, said portions being relatively movable in a direction parallel to said plane on relative movement of said external shear blades.
Claim 2
Dependent Claim
143 words
An assembly for shearing a hollow body comprising a pair of external shear blades, each of said shear blades having an aperture therein to receive said body, said blades meeting in a common shearing plane and being relatively movable in a direction parallel to said plane to shear said body, an internal shearing member lying within said apertures, said member comprising a first expandable portion lying on one side of said plane and a second expandable portion lying on the other side of said plane, said portions being independently movable and each of said portions comprising a circumferentially extending surface having therein only a single gap, and means for expanding said portions simultaneously to substantially fill a hollow body placed in said apertures, said portions being relatively movable in a direction parallel to said plane on relative movement of said external shear blades.
Claim 3
Dependent Claim
64 words
The assembly set forth in claim 1 wherein each of said portions comprises an interrupted ring having a single gap and having a conically tapered internal surface converging towards said plane, and wherein said means for expanding said portions comprise a pair of expander plugs having external surfaces co-operating with the internal surfaces of said portions and means for urging said expander plugs together.
Claim 4
Dependent Claim
40 words
The assembly set forth in claim 1 wherein each of said portions comprises a multi-part structure, said structure comprising a plurality of segments enclosed in a single circumferentially extending relatively thin-walled flexible shell, said shell having a single gap therein.
Claim 5
Dependent Claim
35 words
The assembly set forth in claim 1 wherein each of said portions comprises a single structure, said structure comprising a hollow cylindrical body with a single axially extending gap extending radially through the wall thereof.
References Cited (Backward Citations)
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US3955453A
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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) | 1980-11-21 | 1981-05-23 | 1981-11-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-21 | 1985-05-23 | 1985-11-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-21 | 1989-05-23 | 1989-11-22 | $7700.00 | Window Closed / Lapsed |