US3990690A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core chucking assembly
Assignee: EIDP Inc
•
Filing: 1975-09-08
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Granted: 1976-11-09
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Expires: 1995-09-08
Abstract
Abstract A film core is mounted on a mandrel by utilizing two telescoping sleeves. The inner sleeve is keyed to the mandrel to prevent its rotation about the mandrel is frusto-conical in shape and threaded at the smaller end. The outer sleeve, which fits between the core and the inner sleeve, has an inner tapered surface adapted to engage the frusto-conical inner sleeve. A ring nut engages the threaded inner sleeve and when tightened forces the outer sleeve, which is split, to expand and the inner sleeve, which also is split, to contract. In this manner the core is locked to the mandrel.
Inventors
- 👤 Robert E. Lick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:37
CPC Classifications
B; B23; B23B; B23B31/00; B23B31/02; B23B31/10; B23B31/12; B23B31/20; B23B31/201; B23B31/202; B23B31/2025; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1037; Y10T279/1041; Y10T279/1045
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A core chucking assembly for mounting a core on a mandrel comprising, in combination: a partly frusto-conical inner sleeve adapted to be fitted on said mandrel and exteriorly threaded at the smaller end, said inner sleeve adapted to fit with its frusto-conical end within one end of said core, an outer split sleeve adapted to be fitted between said inner sleeve and said core having an inner frusto-conical configuration adapted to engage said frusto-conical inner sleeve, and a nut threaded on said smaller end of the inner sleeve adapted to effect relative axial movement between said sleeves, thereby to expand said outer sleeve to engage said core and lock said core to said inner sleeve.
Claim 2
Dependent Claim
115 words
A core chucking assembly for mounting a core on a mandrel comprising, in combination: a partly frusto-conical inner sleeve adapted to be fitted on said mandrel and exteriorly threaded at the smaller end, said inner sleeve adapted to fit with its frusto-conical end within one end of said core, an outer split sleeve adapted to be fitted between said inner sleeve and said core having an inner frusto-conical configuration adapted to engage said frusto-conical inner sleeve, and a nut threaded on said smaller end of the inner sleeve adapted to effect relative axial movement between said sleeves, thereby to expand said outer sleeve to engage said core and lock said core to said inner sleeve.
Claim 3
Dependent Claim
17 words
A core chucking assembly according to claim 1 wherein said inner sleeve is keyed to said mandrel.
Claim 4
Dependent Claim
21 words
A core chucking assembly according to claim 1 wherein said inner sleeve is split, thereby to contract and engage said mandrel.
Claim 5
Dependent Claim
21 words
A core chucking assembly according to claim 1 wherein said inner sleeve is split, thereby to contact and grip said mandrel.
References Cited (Backward Citations)
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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) | 1979-11-09 | 1980-05-10 | 1980-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-11-09 | 1984-05-10 | 1984-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-11-09 | 1988-05-10 | 1988-11-09 | $7700.00 | Window Closed / Lapsed |