GB1371839A - Free fall circuit for hydraulic winch - Google Patents
Free fall circuit for hydraulic winchInfo
- Publication number
- GB1371839A GB1371839A GB4908872A GB4908872A GB1371839A GB 1371839 A GB1371839 A GB 1371839A GB 4908872 A GB4908872 A GB 4908872A GB 4908872 A GB4908872 A GB 4908872A GB 1371839 A GB1371839 A GB 1371839A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- free fall
- lines
- clutch
- winch
- 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
Links
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
- B66D1/02—Driving gear
- B66D1/08—Driving gear incorporating fluid motors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/01—Winches, capstans or pivots
- B66D2700/0125—Motor operated winches
- B66D2700/0133—Fluid actuated
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S60/00—Power plants
- Y10S60/905—Winding and reeling
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control And Safety Of Cranes (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
1371839 Controlling winches RUSTONBUCYRUS Ltd 25 Oct 1972 [26 Oct 1971] 49088/72 Heading B8B [Also in Division F2] A free fall operating circuit for an hydraulic winch includes a normally engaged hydraulically releasable free fall clutch 7 and a sensing valve 16 operable to de-activate the clutch release means in response to a pressure differential between the pressure and return lines 11, 12 for the winch motor 1, whereby free fall is prevented whilst the winch drum 2 is being powered in either direction. The clutch 7 is releasable for winch free fall by either manual selection or a lockout valve 15 whereby fluid is supplied from a pump 14 through line 17, sensing valve 16 and line 18, the valve 16 permitting the fluid to pass from line 17 to 18 only when in its neutral position. The valve 16 is operated by pilot pressure lines 25, 26 coupling the motor lines 11, 12 to opposite ends of the valve 16 and any difference in pressure between the lines 11, 12 causes the valve 16 to be displaced from its neutral position and exhaust the lines 17 and 18 the free fall condition of the winch only being selectable therefore when a hoist direction control valve 9 is in its neutral position. To prevent re-engagement of the clutch 7 during free fall movement, which is manually controlled by a foot brake, a solenoid operated safety valve 30 is inserted in the pilot lines 25, 26 and is controlled in response to the speed of the drum 2 and the pressure in the line 18 whereby the clutch 7 cannot be re-engaged due to a pressure differential in the lines 11, 12 while a free fall condition exists since the sensing valve 16 is isolated from the lines 11, 12 by the closed valve 30. A dashpot valve 33 restricts the fluid flow from the clutch operating ram to cushion the effect of reengagement of the clutch due to a power failure. The valve 15 is interlocked with the overall start circuit for the winch so that the winch circuit can only be completed when the valve 15 is in the "off'' position and the free fall condition is not existing. A self sustaining clutch brake arrangement is interposed between the motor and the drum.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US19209771A | 1971-10-26 | 1971-10-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1371839A true GB1371839A (en) | 1974-10-30 |
Family
ID=22708234
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4908872A Expired GB1371839A (en) | 1971-10-26 | 1972-10-25 | Free fall circuit for hydraulic winch |
Country Status (4)
Country | Link |
---|---|
US (1) | US3764111A (en) |
JP (1) | JPS5218974B2 (en) |
CA (1) | CA956924A (en) |
GB (1) | GB1371839A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2482936A1 (en) * | 1980-05-26 | 1981-11-27 | Komatsu Mfg Co Ltd | CLUTCH AND BRAKE CONTROL DEVICE FOR HYDRAULICALLY DRIVEN CRANE WINCHES |
EP0085906A2 (en) * | 1982-01-28 | 1983-08-17 | Hitachi Construction Machinery Co., Ltd. | Operation system for hoisting device |
CN109132909A (en) * | 2018-10-10 | 2019-01-04 | 三汽车起重机械有限公司 | winding hydraulic control system and crane |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2240940C3 (en) * | 1972-08-19 | 1975-11-06 | O & K Orenstein & Koppel Ag Werk Luebeck, 2400 Luebeck | Hydrostatic transmission, especially for winches, hoisting winches, luffing winches or the like |
JPS574597B2 (en) * | 1974-03-04 | 1982-01-26 | ||
US4398698A (en) * | 1981-05-29 | 1983-08-16 | Fmc Corporation | Freefall winch system and method of operation |
US4516755A (en) * | 1982-06-02 | 1985-05-14 | Kabushiki Kaisha Komatsu Seisakusho | Hydraulic winch control system |
JP3508662B2 (en) * | 1998-12-25 | 2004-03-22 | コベルコ建機株式会社 | Hydraulic drive winch control method and device |
CN102336372A (en) * | 2010-07-16 | 2012-02-01 | 徐州重型机械有限公司 | Hydraulic control system of crane and winch device of crane |
CN103723645B (en) * | 2014-01-20 | 2016-09-21 | 安徽柳工起重机有限公司 | Quick release winch control system of dynamic compactor |
US10947094B2 (en) * | 2019-08-05 | 2021-03-16 | Goodrich Corporation | Auxiliary brake assembly |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2258307A (en) * | 1938-11-18 | 1941-10-07 | Vickers Inc | Power transmission |
US3249336A (en) * | 1963-06-18 | 1966-05-03 | Baldwin Lima Hamilton Corp | Hydraulic winch control mechanism |
US3550735A (en) * | 1968-09-23 | 1970-12-29 | Hyster Co | Fluid pressure reversing clutches and brake for winch |
US3578787A (en) * | 1968-11-12 | 1971-05-18 | Northwest Engineering Corp | Control system |
-
1971
- 1971-10-26 US US00192097A patent/US3764111A/en not_active Expired - Lifetime
-
1972
- 1972-10-25 CA CA154,837A patent/CA956924A/en not_active Expired
- 1972-10-25 GB GB4908872A patent/GB1371839A/en not_active Expired
- 1972-10-26 JP JP47107580A patent/JPS5218974B2/ja not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2482936A1 (en) * | 1980-05-26 | 1981-11-27 | Komatsu Mfg Co Ltd | CLUTCH AND BRAKE CONTROL DEVICE FOR HYDRAULICALLY DRIVEN CRANE WINCHES |
EP0085906A2 (en) * | 1982-01-28 | 1983-08-17 | Hitachi Construction Machinery Co., Ltd. | Operation system for hoisting device |
EP0085906A3 (en) * | 1982-01-28 | 1983-12-14 | Hitachi Construction Machinery Co., Ltd. | Operation system for hoisting device |
CN109132909A (en) * | 2018-10-10 | 2019-01-04 | 三汽车起重机械有限公司 | winding hydraulic control system and crane |
CN109132909B (en) * | 2018-10-10 | 2021-02-05 | 三一汽车起重机械有限公司 | Winch hydraulic control system and crane |
Also Published As
Publication number | Publication date |
---|---|
US3764111A (en) | 1973-10-09 |
JPS4862151A (en) | 1973-08-30 |
CA956924A (en) | 1974-10-29 |
JPS5218974B2 (en) | 1977-05-25 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |