US3811632A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Core chucks
Assignee: Individual
•
Filing: 1971-10-01
•
Granted: 1974-05-21
•
Expires: 1991-10-01
Abstract
Abstract There is disclosed in the present specification a core chuck including a deformable outer sleeve of elastomer or equivalent material and a multi-lobar generally rigid internal actuator for expanding the sleeve as a result of relative angular motion in either direction between the sleeve and the actuator from their at-rest positions. The sleeve is non-cylindrical having a plurality of core engaging ridges and is compressible for initial insertion into the core.
Inventors
- 👤 K Bassett
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 08:16
CPC Classifications
B; B65; B65H; B65H75/00; B65H75/02; B65H75/18; B65H75/24; B65H75/242; B65H75/245; B65H75/246; Y; Y10; Y10T; Y10T279/00; Y10T279/10; Y10T279/1074; Y10T279/1079
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
116 words
A core chuck having an axis and adapted for co-axial coupling to a web roll in motion, said roll having a core comprising a unitary deformable outer sleeve having at least a major portion of its length of generally uniform cross section including in its unstressed condition relatively wide relieved longitudinal flanks and relatively narrow ridges spaced more widely from the axis than the relieved flanks and expandable for frictional engagement with the roll core and a multi-lobar rigid actuator disposed within the sleeve with each lobe at least partially embraced by the substance of the sleeve whereby relative motion between the actuator and the sleeve causes the sleeve to expand for internally gripping the core.
Claim 2
Dependent Claim
116 words
A core chuck having an axis and adapted for co-axial coupling to a web roll in motion, said roll having a core comprising a unitary deformable outer sleeve having at least a major portion of its length of generally uniform cross section including in its unstressed condition relatively wide relieved longitudinal flanks and relatively narrow ridges spaced more widely from the axis than the relieved flanks and expandable for frictional engagement with the roll core and a multi-lobar rigid actuator disposed within the sleeve with each lobe at least partially embraced by the substance of the sleeve whereby relative motion between the actuator and the sleeve causes the sleeve to expand for internally gripping the core.
Claim 3
Dependent Claim
29 words
A core chuck according to claim 1 further characterized in that the sleeve is interiorly formed to define a void between the sleeve and the actuator underlying each ridge.
Claim 4
Dependent Claim
30 words
A core chuck according to claim 1 further comprising a slip producing means at the interface between the actuator and the sleeve including a film of polytetrafluoroethylene covering the actuator.
Claim 5
Dependent Claim
22 words
A core chuck according to claim 1 further characterized in that the sleeve is of an elastomer and the actuator is metallic.
Claim 6
Dependent Claim
17 words
A core chuck according to claim 4 in which the elastomer of the sleeve is a urethane.
Claim 7
Dependent Claim
25 words
A core chuck according to claim 5 in which the urethane sleeve has a hardness within the range of durometer A 60 to A 95.
Claim 8
Dependent Claim
17 words
A core chuck according to claim 1 further comprising means for retaining the sleeve on the actuator.
Claim 9
Dependent Claim
24 words
A core chuck according to claim 7 further characterized in that the retaining means comprises an integral lip on the sleeve, engaging the actuator.
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) | 1977-05-20 | 1977-11-19 | 1978-05-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-20 | 1981-11-19 | 1982-05-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-20 | 1985-11-19 | 1986-05-21 | $7700.00 | Window Closed / Lapsed |