Patent US3862808A successfully refreshed from Google Patents.
US3862808A
Expired / Lapsed
US
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Marine propeller shaft and key
Assignee: Individual
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Filing: 1974-08-05
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Granted: 1975-01-28
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Expires: 1994-08-05
Abstract
Abstract An improved end for a tapered marine propeller shaft end and a key with lateral positioning lugs for interconnection with a companionately tapered marine propeller hub; the shaft end includes an axial keyway with a lateral shoulder defined in the surface of the shaft at the tapered end so that, when the hub of a propeller is positioned slidingly, axially into position along the shaft, the key is prohibited from axial movement beyond a predetermined optimum keying position.
Inventors
- 👤 Anthony C Perini
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:15
CPC Classifications
F; F16; F16D; F16D1/00; F16D1/06; F16D1/08; F16D1/09; F16D1/092; B; B63; B63H; B63H23/00; B63H23/32; B63H23/34; F16D1/0876; F16B; F16B2200/00; F16B2200/69; Y; Y10; Y10T; Y10T403/00; Y10T403/70; Y10T403/7018; Y10T403/7021
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
177 words
A tapered marine propeller shaft end and key in combination for receiving a companionately sized marine propeller and hub combination, said shaft and key combination comprising, a shaft having an end including a threaded axial extension at the terminal end and an end zone tapering toward said threaded extension and an annular groove intermediate the extension and the end zone, an axially extending keyway in said end zone, a key sized to nest longitudinally in and to extend out of said keyway, said keyway extending depthwise in the surface of said end zone a uniform distance of about one-half the radial thickness of the key, a lateral recess in the tapered end zone perpendicular to the axial keyway defining a shoulder intermediate the annular groove and the tapered end zone, positioning means on the key and extending outwardly of the longitudinal axis of the key on opposite sides thereof and normally in abutting relation with said shoulder to prohibit longitudinal movement of said key in the keyway when a propeller is positioned over The tapered end zone.
Claim 2
Dependent Claim
177 words
A tapered marine propeller shaft end and key in combination for receiving a companionately sized marine propeller and hub combination, said shaft and key combination comprising, a shaft having an end including a threaded axial extension at the terminal end and an end zone tapering toward said threaded extension and an annular groove intermediate the extension and the end zone, an axially extending keyway in said end zone, a key sized to nest longitudinally in and to extend out of said keyway, said keyway extending depthwise in the surface of said end zone a uniform distance of about one-half the radial thickness of the key, a lateral recess in the tapered end zone perpendicular to the axial keyway defining a shoulder intermediate the annular groove and the tapered end zone, positioning means on the key and extending outwardly of the longitudinal axis of the key on opposite sides thereof and normally in abutting relation with said shoulder to prohibit longitudinal movement of said key in the keyway when a propeller is positioned over The tapered end zone.
Claim 3
Dependent Claim
51 words
The combination as set forth in claim 1 wherein the positioning means comprises a pin passed laterally through said key a distance from the end of the key such that the end surface of the key is in a plane which is at the terminal end of the tapered end zone.
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) | 1978-01-27 | 1978-07-29 | 1979-01-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-01-27 | 1982-07-29 | 1983-01-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-01-27 | 1986-07-29 | 1987-01-28 | $7700.00 | Window Closed / Lapsed |