GB1506646A - Hydraulic lifting mechanisms - Google Patents
Hydraulic lifting mechanismsInfo
- Publication number
- GB1506646A GB1506646A GB11968/75A GB1196875A GB1506646A GB 1506646 A GB1506646 A GB 1506646A GB 11968/75 A GB11968/75 A GB 11968/75A GB 1196875 A GB1196875 A GB 1196875A GB 1506646 A GB1506646 A GB 1506646A
- Authority
- GB
- United Kingdom
- Prior art keywords
- lever
- pump
- hydraulic
- leverage
- march
- 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
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
- B62B3/04—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment
- B62B3/06—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground
- B62B3/0618—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor involving means for grappling or securing in place objects to be carried; Loading or unloading equipment for simply clearing the load from the ground using fluid lifting mechanisms
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/12—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00 by varying the length of stroke of the working members
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Forklifts And Lifting Vehicles (AREA)
- Control Of Fluid Gearings (AREA)
Abstract
1506646 Hydraulic lifting devices JUNGHEINRICH UNTERNEHMENSVERWALTUNG KG 21 March 1975 [22 March 1974] 11968/75 Heading F1D A hydraulic lifting device comprising a pump unit 12, 13, Fig. 1, a pump operating lever 1, and a lift cylinder 5, has an adjusting device 17, 21 responsive to the hydraulic pressure in the lifting cylinder which continuously varies the leverage between the lever 1 and an actuating member 36 of the pump unit in dependence on the hydraulic pressure. As described, the pump plunger 13 is depressed by the lever 36 which carries a roller 35 and is pivoted to the frame at 37. The handle 1 moves links 31 and 29 and the latter bears on the member 36. One pivot 27 of the lever 29 is supported by a member 23 which is pivoted about an axis 25 by the adjusting device 17, 21 to vary the leverage exerted by the operating lever 1. As the pressure in the lifting cylinder rises the pistonrod 21 is extended against springs 20 and the pivot 27 is moved to the left by the member 23 so that the leverage is increased with a proportional decrease in the stroke of the pump. The device is used in a fork-lift truck. Check valves are provided in the hydraulic circuit, Fig. 2 (not shown), and are simultaneously mechanically opened to allow the forks to descend.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2413874A DE2413874A1 (en) | 1974-03-22 | 1974-03-22 | HYDRAULIC LIFTING DEVICE, IN PARTICULAR FOR FORK PALLET TRUCK |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1506646A true GB1506646A (en) | 1978-04-05 |
Family
ID=5910875
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB11968/75A Expired GB1506646A (en) | 1974-03-22 | 1975-03-21 | Hydraulic lifting mechanisms |
Country Status (4)
Country | Link |
---|---|
DE (1) | DE2413874A1 (en) |
FR (1) | FR2264762B1 (en) |
GB (1) | GB1506646A (en) |
SE (1) | SE391511B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2353022A (en) * | 1999-06-11 | 2001-02-14 | Chadwick Materials Handling Lt | Pallet truck |
-
1974
- 1974-03-22 DE DE2413874A patent/DE2413874A1/en not_active Withdrawn
-
1975
- 1975-03-19 SE SE7503116A patent/SE391511B/en not_active IP Right Cessation
- 1975-03-20 FR FR7508759A patent/FR2264762B1/fr not_active Expired
- 1975-03-21 GB GB11968/75A patent/GB1506646A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2353022A (en) * | 1999-06-11 | 2001-02-14 | Chadwick Materials Handling Lt | Pallet truck |
Also Published As
Publication number | Publication date |
---|---|
SE391511B (en) | 1977-02-21 |
DE2413874A1 (en) | 1975-10-02 |
SE7503116L (en) | 1975-09-23 |
FR2264762A1 (en) | 1975-10-17 |
FR2264762B1 (en) | 1980-08-01 |
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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 |