US4503105A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plastic core for an elastically shrinkable tubular cover
Assignee: 3M Co
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Filing: 1984-01-20
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Granted: 1985-03-05
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Expires: 2004-01-20
Abstract
Abstract A hollow tubular core for supporting an elastic tubular cover member in a highly radially stretched condition comprises a cylindrical plastic tube having a plurality of circumferentially spaced, axially extending lugs on the inner wall of the tube and a continuous helical cut in the wall of the tube from the exterior surface thereof severing the tube into a continuous narrow strip with only the lugs connected axially along the length of the tube.
Inventors
- 👤 Shigeo Tomioka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:30
CPC Classifications
B; B29; B29C; B29C61/00; B29C61/06; B29C61/0608; B29C61/065; H; H01; H01B; H01B17/00; H01B17/56; H01B17/58; H02; H02G; H02G1/00; H02G1/14; H02G15/00; H02G15/08; H02G15/18; H02G15/182; H02G15/1826; H02G15/1833; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53657; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/139
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
A hollow tubular plastic core for supporting an elastic tubular cover member in highly radially stretched condition so that the cover member can be positioned over a generally cylindrical object and the core removed to permit the cover member to contract to conform to the outer surface of the object, said hollow core comprising a cylindrical plastic tube with an internal diameter greater than the external diameter of the object to be covered and having a plurality of circumferentially spaced, axially extending lugs on the inner wall of said tube, a continuous helical cut in the wall of said tube from the exterior surface thereof severing said tube into a continuous narrow strip with only the lugs connected axially along the length of said tube, and one end of said strip being free from the tube for a distance and extending back through the tube.
Claim 2
Dependent Claim
145 words
A hollow tubular plastic core for supporting an elastic tubular cover member in highly radially stretched condition so that the cover member can be positioned over a generally cylindrical object and the core removed to permit the cover member to contract to conform to the outer surface of the object, said hollow core comprising a cylindrical plastic tube with an internal diameter greater than the external diameter of the object to be covered and having a plurality of circumferentially spaced, axially extending lugs on the inner wall of said tube, a continuous helical cut in the wall of said tube from the exterior surface thereof severing said tube into a continuous narrow strip with only the lugs connected axially along the length of said tube, and one end of said strip being free from the tube for a distance and extending back through the tube.
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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |