USRE33898E - Free fall windlass - Google Patents
Free fall windlass Download PDFInfo
- Publication number
- USRE33898E USRE33898E US07/670,348 US67034891A USRE33898E US RE33898 E USRE33898 E US RE33898E US 67034891 A US67034891 A US 67034891A US RE33898 E USRE33898 E US RE33898E
- Authority
- US
- United States
- Prior art keywords
- pulley
- shaft
- rotation
- gear
- motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
- B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
- B66D1/74—Capstans
- B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees
Definitions
- the invention relates to improvements for a windlass, and in particular to a windlass which automatically lowers, locks, or raises an anchor by selective application of power.
- an ideal windlass is constructed of components that are few in number, simple in design, inexpensive to produce and assemble, and durable in service. Further, a windlass of good design can be shifted between dropping, locking, and raising action from a remote location without extra manual effort and without the complexity and cost of related servomechanisms and their attendant controls.
- the invention provides a power-operated windlass mechanism that shifts between anchor dropping, locking, and raising modes by a simple reversal in rotary motor direction.
- the mechanism in addition to a reversible motor, is embodied with an anti-feed clutch and shifting means for alternatively connecting or disconnecting both the anti-feed clutch and the motor from a rope pulley in response to a change in the direction of rotation of the motor.
- the energy of the motor drives the shifting means so that manual effort or auxiliary servo systems are unnecessary to accomplish this task.
- the motor When the motor is initially operated in a down direction, the rope pulley is disconnected from the anti-feed clutch and the motor, and the anchor is allowed to drop free to the bottom.
- the mechanism permits the motor to be de-energized after this initial short period of operation in the down direction.
- initial motor operation in the up direction causes the rope pulley to be connected to both the anti-feed clutch and the motor.
- the rope pulley is locked up simply by running the motor up for a short period sufficient to change the state of the shifting means and energize the anti-feed clutch.
- the motor is immediately shut off.
- the motor is again operated in its up direction until the anchor is at a desired height.
- the windlass mechanism is ideally suited for remote operation, since all of its functions can be controlled by selectively directing two-way power to the reversible motor.
- the rope pulley and motor rotate about parallel spaced axii.
- the shifting mans which rotates on the motor shaft axis, has the form of a spur gear and is adapted to engage a spur gear rotationally fixed to the rope pulley.
- a screw thread on the spur gear shifting means causes it to move axially into and out of engagement, depending on the direction of motor rotation, with the rope pulley gear in the manner of a positive contact clutch.
- the spur gear shifting means is constantly restrained by a one-way anti-feed clutch from rotation in a direction corresponding to rope feedout.
- the one-way clutch is associated with a spur gear rotatable in one direction about an axis parallel to the rotational axis of the shifting means.
- the spur gears of the shifting means and one-way clutch have sufficient axial tooth length to remain mutually interengaged while the shifting means moves axially in and out of engagement with the rope pulley spur gear.
- the disclosed windlass construction has few components, is of simple design, and is capable of being mass-produced with limited tooling investment, fabrication costs, and labor.
- the various operative elements can be readily sized and stressed for high durability without a significant penalty in cost, bulk, or weight.
- FIG. 1 is a schematic cross-sectional plan view of a windlass, constructed in accordance with the invention, in a locked or anchor raising condition.
- FIG. 2 is a cross-sectional view of the windlass of FIG. 1 in an anchor dropping condition.
- a windlass 10 including a rope pulley 11, power operated by a rotary motor 12 through a drive system 13.
- the drive system includes spur gears 16-18.
- Rope 21 is taken in or paid out by the pulley 11, depending on its direction of rotation.
- the spur gear 16 is rotationally and axially locked on a shaft 22 by a suitable keyway or spline 25 and a retaining snap ring 23, respectively.
- the rope pulley 11 is fixed by suitable means to an outboard end of the shaft 22.
- the inboard end of the shaft 22 is supported in a bearing 24 carried on a fixed wall or base 26 of the windlass 10.
- the shaft 22 is axially fixed relative to the bearing 24 by suitable means, such as by a press fit therein.
- the motor 12 is preferably a reversible electric motor, but other known types of reversible or two-way motors are adaptable to the present invention.
- the motor 12 includes a shaft 31 on which the spur gear or pinion 17 is assembled.
- the motor 12 and its associated shaft 31 are suitably axially fixed relative to the wall 26.
- a snap ring or split washer 32 fitted on a groove on the shaft 31 is abutted by a thrust washer 33 on a side opposite the motor.
- the spur gear 17 has internal threads 34 in engagement with complementary external threads 35 on the motor shaft 31.
- the spur gear 17 is capable of shifting axially on the shaft 31, depending on the direction of rotation of the motor 12 and resultant relative rotation of the gear 17 thereon.
- the spur gear 17 is resiliently biased in the direction of the motor 12 by a compression spring 37 assembled about the shaft and retained thereon by a snap ring 38 received in a groove on the outboard end of the motor shaft 31.
- a thrust washer 39 is interposed between the spur gear 17 and spring 37.
- a portion 41 of the shaft 31 outboard of the threads 35 is sufficiently long to receive the spur gear 17 thereon, as well as a compressed length of the spring 37.
- the lead edges 42 of the teeth 43 of the spur gear 17 may be beveled or otherwise shaped in a known manner to facilitate proper tooth engagement with the rope pulley gear 16.
- the spur gear 18 is supported on a pin 44 by conventional one-way roller clutch members 46.
- the pin 44 extends through a hole in the wall 26 and is fixed to the wall by a nut 47, which draws an integral shoulder 48 against the wall.
- the pin 44 has its longitudinal axis parallel to that of the rope pulley shaft 22 and motor shaft 31.
- the one-way roller clutches 46 support the associated spur gear 18 for rotation in only one rotary direction about the axis of the pin 44.
- a compression spring 51 assembled on the outboard or free end of the pin 44 is compressed between a pair of thrust washers 52 at each of its ends and is retained on the pin by a split ring 53 received in an annular groove on the pin.
- the spring 51 operates as a friction brake through the thrust washer 52 on the assembly of the spur gear 18 and one-way clutches 46 to retard this assembly slightly in rotation in the operative direction of the clutches.
- the threads 35 on the motor shaft 31 are, for exemplary purposes, left-hand.
- the motor 12 is most conveniently a reversible electric unit operating, for example, on 12 volts DC.
- Appropriate electrical cables and a control switch remote from the windlass 10 connect the motor 12 to a source of electrical energy such as a DC battery.
- the control switch and electrical circuitry are effective to apply the proper polarity and current to the motor to run it in either rotary direction or stop it from running.
- the motor 12 has been most recently run in the rotary direction indicated by the arrow 54, i.e., the portion of the motor-driven shaft 31 above the plane of the drawing is moving to the left.
- the motor 12 When it is desired to drop the anchor, the motor 12 is operated in a rotary direction opposite that of the arrow 54. Initially, this motor shaft rotation causes the spur gear 17 to move axially by forces developed by the mating threads 34, 35. As shown in FIG. 2, eventually the spur gear 17 shifts axially out of engagement with the rope pulley gear 16, at which point the latter gear, as well as the rope pulley 11, is free of restriction against rotation imposed by the one-way or anti-feed clutches 46. Note that, as indicated in FIG. 2, the relative lengths of the gears are such that gears 17 and 18 are still in engagement when gears 16 and 17 are out of engagement. Separation of the threads 34, 35 limits axial movement of pinion 17 away from the gear 16.
- the anchor is allowed to drop by gravity and the strand or rope 21 feeds out from the pulley 11.
- the motor operation if desired, can be discontinued. Regardless of whether or not motor operation in the down direction is continued, the anchor will drop until it reaches bottom.
- the rope pulley 11 can be locked up against further letting out by momentarily operating the motor 12 in the up direction indicated by the arrow 54.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
Description
Claims (3)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/670,348 USRE33898E (en) | 1987-05-01 | 1991-03-15 | Free fall windlass |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US07/045,604 US4809633A (en) | 1987-05-01 | 1987-05-01 | Free fall windlass |
US07/670,348 USRE33898E (en) | 1987-05-01 | 1991-03-15 | Free fall windlass |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/045,604 Reissue US4809633A (en) | 1987-05-01 | 1987-05-01 | Free fall windlass |
Publications (1)
Publication Number | Publication Date |
---|---|
USRE33898E true USRE33898E (en) | 1992-04-28 |
Family
ID=26722987
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US07/670,348 Expired - Lifetime USRE33898E (en) | 1987-05-01 | 1991-03-15 | Free fall windlass |
Country Status (1)
Country | Link |
---|---|
US (1) | USRE33898E (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5575456A (en) * | 1995-06-12 | 1996-11-19 | Columbus Mckinnon Corporation | Lever operated hoist |
US20050284276A1 (en) * | 2004-06-23 | 2005-12-29 | Credo Technology Corporation | Angular adjustment apparatus for a miter saw |
US20060108571A1 (en) * | 2004-11-22 | 2006-05-25 | Campbell Hausfeld/Scott Fetzer Company | Freefall windlass with governor |
US20080173850A1 (en) * | 2007-01-18 | 2008-07-24 | Grand Winches Industry Co., Ltd. | Automatic winder |
US8047111B2 (en) | 2004-06-30 | 2011-11-01 | Hitachi Koki Co., Ltd. | Miter saw having angle adjustment mechanism |
US20130112931A1 (en) * | 2010-07-13 | 2013-05-09 | Liebherr-Components Biberach Gmbh | Winch |
US9978265B2 (en) | 2016-04-11 | 2018-05-22 | Tti (Macao Commercial Offshore) Limited | Modular garage door opener |
US10015898B2 (en) | 2016-04-11 | 2018-07-03 | Tti (Macao Commercial Offshore) Limited | Modular garage door opener |
US11124396B2 (en) * | 2017-09-05 | 2021-09-21 | Liebherr-Components Biberach Gmbh | Free fall winch |
CN113310854B (en) * | 2021-04-22 | 2022-08-30 | 杭州亚太建设监理咨询有限公司 | Shaking device for measuring sand content of slurry |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE526862A (en) * | 1953-03-09 | 1956-09-14 | ||
US2795396A (en) * | 1951-04-05 | 1957-06-11 | Bucyrus Erie Co | Automatic feed for cable-tool drills |
US3100626A (en) * | 1960-10-27 | 1963-08-13 | Fred C Good | Windlass |
US3443772A (en) * | 1967-10-18 | 1969-05-13 | Daniel Shafter Prosser | Water ski towline reel and drive means therefor |
US4004780A (en) * | 1975-09-23 | 1977-01-25 | Warn Industries, Inc. | Winch |
GB2041317A (en) * | 1979-01-17 | 1980-09-10 | Taiyo Sengu Co Ltd | Anchor winch |
US4566674A (en) * | 1984-11-05 | 1986-01-28 | Fulton Manufacturing Corporation | Neutral winch |
-
1991
- 1991-03-15 US US07/670,348 patent/USRE33898E/en not_active Expired - Lifetime
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2795396A (en) * | 1951-04-05 | 1957-06-11 | Bucyrus Erie Co | Automatic feed for cable-tool drills |
BE526862A (en) * | 1953-03-09 | 1956-09-14 | ||
US3100626A (en) * | 1960-10-27 | 1963-08-13 | Fred C Good | Windlass |
US3443772A (en) * | 1967-10-18 | 1969-05-13 | Daniel Shafter Prosser | Water ski towline reel and drive means therefor |
US4004780A (en) * | 1975-09-23 | 1977-01-25 | Warn Industries, Inc. | Winch |
GB2041317A (en) * | 1979-01-17 | 1980-09-10 | Taiyo Sengu Co Ltd | Anchor winch |
US4566674A (en) * | 1984-11-05 | 1986-01-28 | Fulton Manufacturing Corporation | Neutral winch |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5575456A (en) * | 1995-06-12 | 1996-11-19 | Columbus Mckinnon Corporation | Lever operated hoist |
US20050284276A1 (en) * | 2004-06-23 | 2005-12-29 | Credo Technology Corporation | Angular adjustment apparatus for a miter saw |
US7861633B2 (en) * | 2004-06-23 | 2011-01-04 | Robert Bosch Gmbh | Angular adjustment apparatus for a miter saw |
US8047111B2 (en) | 2004-06-30 | 2011-11-01 | Hitachi Koki Co., Ltd. | Miter saw having angle adjustment mechanism |
US20060108571A1 (en) * | 2004-11-22 | 2006-05-25 | Campbell Hausfeld/Scott Fetzer Company | Freefall windlass with governor |
US7140598B2 (en) * | 2004-11-22 | 2006-11-28 | Campbell Hausfeld/Scott Fetzer Company | Freefall windlass with governor |
US20080173850A1 (en) * | 2007-01-18 | 2008-07-24 | Grand Winches Industry Co., Ltd. | Automatic winder |
US7513485B2 (en) * | 2007-01-18 | 2009-04-07 | Grand Winches Industry Co., Ltd. | Automatic winder |
US20130112931A1 (en) * | 2010-07-13 | 2013-05-09 | Liebherr-Components Biberach Gmbh | Winch |
US10246311B2 (en) * | 2010-07-13 | 2019-04-02 | Liebherr-Components Biberach Gmbh | Winch |
US9978265B2 (en) | 2016-04-11 | 2018-05-22 | Tti (Macao Commercial Offshore) Limited | Modular garage door opener |
US10015898B2 (en) | 2016-04-11 | 2018-07-03 | Tti (Macao Commercial Offshore) Limited | Modular garage door opener |
US10127806B2 (en) | 2016-04-11 | 2018-11-13 | Tti (Macao Commercial Offshore) Limited | Methods and systems for controlling a garage door opener accessory |
US10157538B2 (en) | 2016-04-11 | 2018-12-18 | Tti (Macao Commercial Offshore) Limited | Modular garage door opener |
US10237996B2 (en) | 2016-04-11 | 2019-03-19 | Tti (Macao Commercial Offshore) Limited | Modular garage door opener |
US11124396B2 (en) * | 2017-09-05 | 2021-09-21 | Liebherr-Components Biberach Gmbh | Free fall winch |
CN113310854B (en) * | 2021-04-22 | 2022-08-30 | 杭州亚太建设监理咨询有限公司 | Shaking device for measuring sand content of slurry |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: CAMPBELL HAUSFELD/SCOTT FETZER COMPANY A DE COR Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SCOTT FETZER COMPANY, THE, A CORPORATION OF DE;REEL/FRAME:005722/0273 Effective date: 19910513 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 4 |
|
FPAY | Fee payment |
Year of fee payment: 8 |
|
FEPP | Fee payment procedure |
Free format text: PAYER NUMBER DE-ASSIGNED (ORIGINAL EVENT CODE: RMPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
FPAY | Fee payment |
Year of fee payment: 12 |
|
AS | Assignment |
Owner name: CAREFREE/SCOTT FETZER COMPANY, COLORADO Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CAMPBELL HAUSFELD/SCOTT FETZER COMPANY;REEL/FRAME:018934/0937 Effective date: 20070226 |