Patent US4227680A successfully refreshed from Google Patents.
US4227680A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic winch
Assignee: Pullmaster Winch Corp
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Filing: 1979-02-28
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Granted: 1980-10-14
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Expires: 1999-02-28
Abstract
Abstract A rapid reverse winch has a hollow winding drum and a hydraulic motor to a first side of the drum. A drive shaft extends inwardly from the motor and is connected to a primary sun gear near the center of the drum. A primary internal gear extends about the primary sun gear. There is a primary planet hub between the primary sun gear and the primary internal gear and a plurality of planet gears rotatably mounted on the primary planet hub are in mesh with the primary sun gear and the primary internal gear. A final drive sun gear to a second side of the drum is connected to the primary planet housing. A non-rotatable final drive housing extends about the final sun gear. There is a final drive planet hub between the final drive sun gear and the final drive housing with a plurality of planet gears in mesh with the final drive internal gear and the final drive sun gear. A sprag clutch between the drive shaft and the primary internal gear permits rotation between the drive shaft and the primary internal gear when the motor rotates the drum in a winding-in direction. The clutch non-rotatably interconnects the primary internal gear and the drive shaft when the drum is rotated in a reeling-out direction opposite to the winding-in direction.
Inventors
- 👤 Stan Hrescak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:31
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/02; B66D1/14; B66D1/22
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
241 words
A rapid reverse winch comprising: a hollow winding drum rotatable about a longitudinal central axis; a motor to a first side of the drum having a drive shaft coaxial with the central axis and extending towards a second side of the drum; a primary sun gear connected to an inner end of the drive shaft; a primary internal gear extending about the primary sun gear; a primary planet hub between the primary sun gear and the primary internal gear; a plurality of planet gears rotatably mounted on the primary planet hub in mesh with the primary sun gear and the primary internal gear; a final drive sun gear to a second side of the drum and connected to the primary planet hub; a non-rotatable drive housing with a final internal gear extending about the final sun gear; a final drive planet hub between the final drive sun gear and the final drive housing and connected to the drum; a plurality of planet gears rotatably mounted on the final drive planet hub in mesh with the final internal gear and the final sun gear; and free-wheel means between the drive shaft and the primary internal gear permitting rotation between the drive shaft and the primary internal gear when the motor rotates the drum in a winding-in direction and non-rotatably interconnecting the primary internal gear and the drive shaft when the drum is rotated in a reeling-out direction opposite to the winding-in direction.
Claim 2
Dependent Claim
241 words
A rapid reverse winch comprising: a hollow winding drum rotatable about a longitudinal central axis; a motor to a first side of the drum having a drive shaft coaxial with the central axis and extending towards a second side of the drum; a primary sun gear connected to an inner end of the drive shaft; a primary internal gear extending about the primary sun gear; a primary planet hub between the primary sun gear and the primary internal gear; a plurality of planet gears rotatably mounted on the primary planet hub in mesh with the primary sun gear and the primary internal gear; a final drive sun gear to a second side of the drum and connected to the primary planet hub; a non-rotatable drive housing with a final internal gear extending about the final sun gear; a final drive planet hub between the final drive sun gear and the final drive housing and connected to the drum; a plurality of planet gears rotatably mounted on the final drive planet hub in mesh with the final internal gear and the final sun gear; and free-wheel means between the drive shaft and the primary internal gear permitting rotation between the drive shaft and the primary internal gear when the motor rotates the drum in a winding-in direction and non-rotatably interconnecting the primary internal gear and the drive shaft when the drum is rotated in a reeling-out direction opposite to the winding-in direction.
Claim 3
Dependent Claim
31 words
A winch as claimed in claim 1, the primary internal gear, primary sun gear and the primary planet housing being located within the hollow winding drum generally near the centre thereof.
Claim 4
Dependent Claim
41 words
A winch as claimed in claim 2, comprising a sleeve rigidly connected to the primary internal gear and extending towards the first side of the drum about the drive shaft, the free-wheel means being between the drive shaft and the sleeve.
Claim 5
Dependent Claim
14 words
A winch as claimed in claim 3, the free-wheel means comprising a sprag clutch.
Claim 6
Dependent Claim
24 words
A winch as claimed in claim 4, comprising a brake engageable with a member mounted on the sleeve for resisting rotation of the drum.
Claim 7
Dependent Claim
27 words
A winch as claimed in claim 5, the brake comprising resilient means for engaging the brake and means for releasing the brake during reeling-out of the drum.
Claim 8
Dependent Claim
38 words
A winch as claimed in claim 6, the motor comprising a hydraulic motor, the means for releasing comprising hydraulic means for releasing the brake when the motor is operated in a reverse direction for reeling-out of the drum.
Claim 9
Dependent Claim
17 words
A winch as claimed in claim 7, the brake being to the first side of the drum.
Claim 10
Dependent Claim
29 words
A winch as claimed in claim 8, the brake comprising a brake disc connected to the sleeve and a piston member urged against the disc by the resilient means.
Claim 11
Dependent Claim
95 words
A winch as claimed in claim 9, comprising a plurality of said brake discs with spacer discs interposed therebetween, the piston member being annular and being located outwardly from the brake discs, the resilient means comprising a plurality of coil springs compressed between the piston member and an end housing of the winch, the hydraulic means comprising an annular space between the end housing and the piston member including an outer wall on the piston and an inner wall on the housing and a conduit for hydraulic fluid connecting the annular space to the motor.
Claim 12
Dependent Claim
50 words
A winch as claimed in claim 10, comprising a first bearing between the drum and the final drive housing, a second bearing between the drum and the end housing, a third bearing between the end housing and the sleeve, and a fourth bearing between the drive shaft and the sleeve.
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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) | 1983-10-14 | 1984-04-14 | 1984-10-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-10-14 | 1988-04-14 | 1988-10-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-10-14 | 1992-04-14 | 1992-10-14 | $7700.00 | Window Closed / Lapsed |