Patent US3910558A successfully refreshed from Google Patents.
US3910558A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy duty winch for cargo tie-down
Assignee: Kinedyne LLC
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Filing: 1974-02-13
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Granted: 1975-10-07
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Expires: 1994-02-13
Abstract
Abstract The tubular drum of a winch, for example, in a cargo tie-down apparatus, has a cylindrical outer surface and a longitudinal slot through which one end of a strap extends into and is secured in the drum, and the longitudinal edge of said slot over which the strap is drawn during winding of the strap on the drum is disposed inwardly of said cylindrical surface. Desirably, a convex curved surface of small curvature along said edge merges gradually into said cylindrical surface. The invention eliminates or reduces to the minimum the possibility of fraying or cutting of the strap by the slot edge, and the strap during winding thereof is capable of withstanding extremely high tensions over long periods of time.
Inventors
- 👤 Henry J Brucker
- 👤 Robert J Brucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:22
CPC Classifications
B; B60; B60P; B60P7/00; B60P7/06; B60P7/08; B60P7/0823; B60P7/083
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
130 words
A winch for winding a strap comprising the combination of a frame, a winding drum having a tubular wall journaled to rotate in said frame, and means for rotating said drum, said wall having a cylindrical outer surface for winding such a strap thereon and having intermediate its ends a longitudinal slot extending radially therethrough providing for passage of said strap radially through said slot, the longitudinal edge of the slot over which said strap is drawn during winding of the strap being disposed inwardly of said cylindrical outer surface and there being an exterior curved surface extending convexly from said edge of the slot eccentric to and gradually merging into said cylindrical surface thereby to reduce the possibility of fraying of the strap by said edge of the slot.
Claim 2
Dependent Claim
130 words
A winch for winding a strap comprising the combination of a frame, a winding drum having a tubular wall journaled to rotate in said frame, and means for rotating said drum, said wall having a cylindrical outer surface for winding such a strap thereon and having intermediate its ends a longitudinal slot extending radially therethrough providing for passage of said strap radially through said slot, the longitudinal edge of the slot over which said strap is drawn during winding of the strap being disposed inwardly of said cylindrical outer surface and there being an exterior curved surface extending convexly from said edge of the slot eccentric to and gradually merging into said cylindrical surface thereby to reduce the possibility of fraying of the strap by said edge of the slot.
Claim 3
Dependent Claim
135 words
The combination of a frame, a tubular drum journaled to rotate in said frame and having a cylindrical outer surface and a longitudinal slot extending radially therethrough, means to rotate said drum, a strap to be wound on said cylindrical surface and extending radially through said slot with one end portion disposed within said drum and means to hold said end portion against being pulled out of said drum through said slot, characterized in that the longitudinal edge of said slot over which the strap is drawn during winding of the strap is disposed inwardly of said cylindrical surface and there is a convexly curved surface that extends outwardly from said edge and merges gradually into said cylindrical surface thereby to reduce the possibility of fraying of the strap by said edge of the slot.
Claim 4
Dependent Claim
135 words
The combination of a frame, a tubular drum journaled to rotate in said frame and having a cylindrical outer surface and a longitudinal slot extending radially therethrough, means to rotate said drum, a strap to be wound on said cylindrical surface and extending radially through said slot with one end portion disposed within said drum and means to hold said end portion against being pulled out of said drum through said slot, characterized in that the longitudinal edge of said slot over which the strap is drawn during winding of the strap is disposed inwardly of said cylindrical surface and there is a convexly curved surface that extends outwardly from said edge and merges gradually into said cylindrical surface thereby to reduce the possibility of fraying of the strap by said edge of the slot.
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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) | 1978-10-06 | 1979-04-07 | 1979-10-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-10-06 | 1983-04-07 | 1983-10-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-10-06 | 1987-04-07 | 1987-10-07 | $7700.00 | Window Closed / Lapsed |