GB927176A - Improvements in or relating to hydraulic devices for effecting raising and lowering of equipment coupled to agricultural tractors - Google Patents
Improvements in or relating to hydraulic devices for effecting raising and lowering of equipment coupled to agricultural tractorsInfo
- Publication number
- GB927176A GB927176A GB29075/59A GB2907559A GB927176A GB 927176 A GB927176 A GB 927176A GB 29075/59 A GB29075/59 A GB 29075/59A GB 2907559 A GB2907559 A GB 2907559A GB 927176 A GB927176 A GB 927176A
- Authority
- GB
- United Kingdom
- Prior art keywords
- valve
- lift
- slide
- fluid
- arm
- 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
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
- A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
- A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements
- A01B63/114—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements to achieve a constant working depth
- A01B63/1145—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements to achieve a constant working depth for controlling weight transfer between implements and tractor wheels
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
- A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
- A01B63/1006—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means the hydraulic or pneumatic means structurally belonging to the tractor
- A01B63/1013—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means the hydraulic or pneumatic means structurally belonging to the tractor and being located inside the tractor body
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
- A01B63/00—Lifting or adjusting devices or arrangements for agricultural machines or implements
- A01B63/02—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors
- A01B63/10—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means
- A01B63/111—Lifting or adjusting devices or arrangements for agricultural machines or implements for implements mounted on tractors operated by hydraulic or pneumatic means regulating working depth of implements
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Soil Sciences (AREA)
- Environmental Sciences (AREA)
- Fluid-Pressure Circuits (AREA)
- Lifting Devices For Agricultural Implements (AREA)
Abstract
927,176. Power-lift linkages. REGIE NATIONALE DES USINES RENAULT. Aug. 25, 1959 [Sept. 8, 1958], No. 29075/59. Class 79(1) A tractor power-lift hydraulic system comprises a pump 3 mounted in a sump 1 supplying fluid through a pipe 2 to a distributer 4 controlled by a valve slide 10 and from which fluid may be supplied to a power cylinder 5, discharged to the sump or supplied to auxiliary mechanism through a pipe 28, the valve slide 10 being connected both to a control handle 12 and to the powerlift arm 9 by a linkage 11. The fluid supply pipe 2 has a relief valve controlled by a rod 26 actuated by the piston 6 at the maximum lifting position. In the initial, inoperative position, Fig. 1, fluid from the pipe 2 enters a chamber 14 blocked by the valve slide, build-up of pressure within which opens a valve 17 allowing the pressure fluid to discharge to the sump. The chamber 14 is reached through a throttle orifice 15. In order to lift the arm 9, the handle 12 is moved to the right, Fig. 2, moving the slide 10 to the left, and opening the chamber 14 through a passage 13 to the sump, thus closing the valve 17. The fluid pressure from 2 now opens valves 18 and 23 and the lift cylinder is supplied. As the arm is raised the valve slide is moved to the right by the linkage 11 until a position is reached in which the opening 13 is closed, causing the valve 17 to open, pressure within the cylinder causing valves 18 and 23 to close and so the raised position is retained. To lower the arm 9, the handle 12 is moved to the left as shown in Fig. 3, causing the slide 10 to move to the right and thus the cylindrical portion 10<SP>2</SP> will open the valve 18 by raising the rod 20. The rate of discharge can be controlled by a manually operable valve 21. As the lift arm 9 descends it moves the slide to the left and the movement will cease when the valve 18 is reclosed. A valve 24 for throttling the pressure fluid may be employed to provide limited lift to obtain weight transfer. A three-way cock 27 may be employed in the " lift " position to operate auxiliary apparatus.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR774018A FR1222459A (en) | 1958-09-08 | 1958-09-08 | Hydraulic lifting device for tractors |
| FR813982 | 1959-12-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB927176A true GB927176A (en) | 1963-05-29 |
Family
ID=26183552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB29075/59A Expired GB927176A (en) | 1958-09-08 | 1959-08-25 | Improvements in or relating to hydraulic devices for effecting raising and lowering of equipment coupled to agricultural tractors |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US3156156A (en) |
| FR (1) | FR76796E (en) |
| GB (1) | GB927176A (en) |
| OA (1) | OA01448A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3239012A (en) * | 1960-08-26 | 1966-03-08 | Massey Ferguson Inc | Hydraulic power unit and control system for tractors |
| FR1325023A (en) * | 1962-03-14 | 1963-04-26 | Siderurgie Fse Inst Rech | Control process for combustion-free capture of gases from pneumatic refining of pig irons |
| US4183287A (en) * | 1975-02-22 | 1980-01-15 | Kubota Tekko Co., Ltd. | Hydraulic control apparatus for tractor |
| JP4206373B2 (en) * | 2004-08-24 | 2009-01-07 | ヤンマー株式会社 | Hydraulic lift structure |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2375946A (en) * | 1942-07-08 | 1945-05-15 | Western Electric Co | Control system |
| US2538143A (en) * | 1943-02-01 | 1951-01-16 | Deere & Co | Power lift |
| US2482249A (en) * | 1944-11-01 | 1949-09-20 | Deere & Co | Hydraulic mechanism |
| US2477710A (en) * | 1945-10-15 | 1949-08-02 | Deere & Co | Pressure fluid follow-up servomotor |
| US2847030A (en) * | 1955-01-03 | 1958-08-12 | Ford Motor Co | Valve means for tractor hydraulic system |
| US2851938A (en) * | 1956-05-28 | 1958-09-16 | Deere Mfg Co | Tractor hydraulic power lift control |
-
1959
- 1959-08-10 US US832814A patent/US3156156A/en not_active Expired - Lifetime
- 1959-08-25 GB GB29075/59A patent/GB927176A/en not_active Expired
- 1959-12-23 FR FR813982A patent/FR76796E/en not_active Expired
-
1964
- 1964-12-31 OA OA51982A patent/OA01448A/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| FR76796E (en) | 1961-12-01 |
| OA01448A (en) | 1969-07-04 |
| US3156156A (en) | 1964-11-10 |
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