GB1342407A - Lift truck - Google Patents
Lift truckInfo
- Publication number
- GB1342407A GB1342407A GB3046871A GB3046871A GB1342407A GB 1342407 A GB1342407 A GB 1342407A GB 3046871 A GB3046871 A GB 3046871A GB 3046871 A GB3046871 A GB 3046871A GB 1342407 A GB1342407 A GB 1342407A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- valve
- mast
- lift
- ram
- 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
- RRLHMJHRFMHVNM-BQVXCWBNSA-N [(2s,3r,6r)-6-[5-[5-hydroxy-3-(4-hydroxyphenyl)-4-oxochromen-7-yl]oxypentoxy]-2-methyl-3,6-dihydro-2h-pyran-3-yl] acetate Chemical compound C1=C[C@@H](OC(C)=O)[C@H](C)O[C@H]1OCCCCCOC1=CC(O)=C2C(=O)C(C=3C=CC(O)=CC=3)=COC2=C1 RRLHMJHRFMHVNM-BQVXCWBNSA-N 0.000 abstract 3
- 230000001105 regulatory effect Effects 0.000 abstract 2
- 230000007423 decrease Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
- B66F17/003—Safety devices, e.g. for limiting or indicating lifting force for fork-lift trucks
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
- B66F9/00—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes
- B66F9/06—Devices for lifting or lowering bulky or heavy goods for loading or unloading purposes movable, with their loads, on wheels or the like, e.g. fork-lift trucks
- B66F9/075—Constructional features or details
- B66F9/20—Means for actuating or controlling masts, platforms, or forks
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Transportation (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Civil Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
1342407 Lift trucks BYGG-OCH TRANSPORTEKONOMI (BT) AB 29 June 1971 [1 July 1970] 30468/71 Heading B8H A lift truck comprises a mast 8, load carriage having a pair of forks 9, an hydraulic lifting ram 5 operatively connected to effect movement of the forks 9, the hydraulic system which includes the ram 5 including pre-set and adjustable pressure regulating valves 3, 7, Fig. 3, which control the pressure in the cylinder 5 and thus the lift capacity of the lift truck. Up to a certain point on the mast 8 the pre-set valve 3 controls the supply of oil from a tank 6 to the ram 5, the load capacity being constant up to that point, at which point the adjustable valve Y takes over and decreases the lift capacity linearly, the said valve being adjusted by means of a wire 10 connected thereto and to the load carriage at 11. In a second embodiment of the hydraulic system for the lift truck, Fig. 5 (not shown), three fixedly set pressure regulating valves (20), (21), (22) are arranged in parallel and have supply conduits provided with electrically controlled stop valves (17), (18), (19) respectively which are normally shut-off when a pre-set valve (3) controls the pressure to the lifting ram, but are opened when the load carriage reaches heights (h17), (h18), (h19), Fig. 6 (not shown), the opening being effected by means of limit switches (not shown) placed on the mast. The pressure in the lifting ram is thus reduced from a maximum pressure (Pmax), which prevails therein when the valve (3) is operating, to a minimum pressure (P22) which is the pressure to which the valve (22) is set, when the load carriage reaches its highest point on the mast.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE9101/70A SE344053B (en) | 1970-07-01 | 1970-07-01 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1342407A true GB1342407A (en) | 1974-01-03 |
Family
ID=20275844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3046871A Expired GB1342407A (en) | 1970-07-01 | 1971-06-29 | Lift truck |
Country Status (4)
Country | Link |
---|---|
US (1) | US3774726A (en) |
DE (1) | DE2132842A1 (en) |
GB (1) | GB1342407A (en) |
SE (1) | SE344053B (en) |
Families Citing this family (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4005850A (en) * | 1974-04-08 | 1977-02-01 | Goodbary Engineering Co. | Floor jack |
US4202175A (en) * | 1977-05-13 | 1980-05-13 | Hale Frank L | Hydraulic control system for a dump truck |
US4163412A (en) * | 1977-10-03 | 1979-08-07 | Towmotor Corporation | Fluid cylinder control with precision stop action |
US4280397A (en) * | 1978-04-27 | 1981-07-28 | Joy Manufacturing Company | Hydraulic fluid control apparatus |
FR2521543B1 (en) * | 1982-02-12 | 1986-02-21 | Manitou Bf | AUTOMATIC LOAD-BASED SAFETY DEVICE FOR A LIFT TRUCK |
US4458785A (en) * | 1982-10-25 | 1984-07-10 | Bushnell Jr Sherman W | Lift |
US4713936A (en) * | 1985-11-18 | 1987-12-22 | Deere & Company | Motor seal protector valve |
DE4021984A1 (en) * | 1990-07-11 | 1992-01-16 | Steinbock Boss Gmbh | LOAD RECEIVING VEHICLE WITH TIP LOCK |
US5890562A (en) * | 1996-08-16 | 1999-04-06 | Bt Prime Mover, Inc. | Control console for material handling vehicle |
DE19919655B4 (en) * | 1999-04-29 | 2004-08-26 | Jungheinrich Ag | Industrial truck with anti-tip device |
US7823698B2 (en) * | 2007-08-01 | 2010-11-02 | Wiggins Light Co., Inc. | Three stage mast |
US8777545B2 (en) * | 2009-10-20 | 2014-07-15 | Bright Coop, Inc. | Free lift mast for truck mounted forklift |
US10160628B2 (en) * | 2016-03-24 | 2018-12-25 | Toyota Motor Engineering & Manufacturing North America, Inc. | Pneumatic lifting device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3125856A (en) * | 1964-03-24 | Variable-pressure hydraulic control system | ||
US2751994A (en) * | 1950-02-08 | 1956-06-26 | Baker Raulang Co | Load limit mechanism |
US2810930A (en) * | 1950-10-06 | 1957-10-29 | Mortimer D Macdonald | Press having thickness control means |
US3307656A (en) * | 1965-10-22 | 1967-03-07 | Clark Equipment Co | Hydraulic system for lift trucks and the like |
US3542161A (en) * | 1968-08-23 | 1970-11-24 | Eaton Yale & Towne | Load height indicator for industrial trucks |
-
1970
- 1970-07-01 SE SE9101/70A patent/SE344053B/xx unknown
-
1971
- 1971-06-29 GB GB3046871A patent/GB1342407A/en not_active Expired
- 1971-06-29 US US00157983A patent/US3774726A/en not_active Expired - Lifetime
- 1971-07-01 DE DE19712132842 patent/DE2132842A1/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
SE344053B (en) | 1972-03-27 |
US3774726A (en) | 1973-11-27 |
DE2132842A1 (en) | 1972-01-05 |
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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 |