GB1461914A - Vehicle overload proteciton device - Google Patents
Vehicle overload proteciton deviceInfo
- Publication number
- GB1461914A GB1461914A GB5922873A GB5922873A GB1461914A GB 1461914 A GB1461914 A GB 1461914A GB 5922873 A GB5922873 A GB 5922873A GB 5922873 A GB5922873 A GB 5922873A GB 1461914 A GB1461914 A GB 1461914A
- Authority
- GB
- United Kingdom
- Prior art keywords
- piston
- mast
- tilt
- annular
- overbalance
- 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
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
1461914 Overload protection of masted lift truck EATON CORP 20 Dec 1973 [27 Dec 1972] 59228/73 Heading B8H [Also in Division Fl] An hydraulic circuit, to prevent the forward tipping of a fork lift truck having a pair of hydraulic cylinders 28 to tilt the mast of the truck about a horizontal axis between either side of a vertical plane through said axis, comprises a tilt selector control 36 to respectively supply pressurized fluid from a source (not shown) and return the fluid to a tank (not shown) via pipes 46 or 68 to the full or annular sides of the piston 48, 50 of the cylinders 28. The annular and full area sides of the respective pistons are further interconnected by pipes 72, 74 and pipes 54, 56 respectively which are coupled via check valves 76, 58, whereby only the highest pressure from a respective side of the piston is coupled with a respective side of piston 88 in a tilt limiting valve 64. The piston 88 has an annular ring 90 through which fluid flows between the pipe 68 and the selector tilt control valve 36 during the normal tilting of the mast. As soon as the mast approaches an overbalance situation the pressure on the annular side of the pistons 48 moves the piston 88 to close the connection between the pipe 68 and the valve 36 and thereby prevent further motion in the overbalance direction. A by-pass pipe 100 with a one-way valve 102 allows fluid to be supplied to the cylinders 28 to move the mast away from an overbalance position.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US00319068A US3850323A (en) | 1972-12-27 | 1972-12-27 | Overload protection device with differential pressure sensing |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1461914A true GB1461914A (en) | 1977-01-19 |
Family
ID=23240727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB5922873A Expired GB1461914A (en) | 1972-12-27 | 1973-12-20 | Vehicle overload proteciton device |
Country Status (6)
Country | Link |
---|---|
US (1) | US3850323A (en) |
JP (1) | JPS5911519B2 (en) |
DE (1) | DE2364198A1 (en) |
FR (1) | FR2212286B1 (en) |
GB (1) | GB1461914A (en) |
IT (1) | IT1000607B (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3960286A (en) * | 1974-12-19 | 1976-06-01 | Allis-Chalmers Corporation | Automatic overload control for a counterbalanced lift truck |
US4003487A (en) * | 1975-04-03 | 1977-01-18 | Allis-Chalmers Corporation | Truck overload protective system having trip signal sampling means |
US3993166A (en) * | 1975-04-29 | 1976-11-23 | Bofors America, Inc. | Overload signalling system for fork lift trucks and the like |
US4093091A (en) * | 1976-06-30 | 1978-06-06 | Towmotor Corporation | Load moment sensing system for lift trucks |
US4222491A (en) * | 1978-08-02 | 1980-09-16 | Eaton Corporation | Crane operating aid and sensor arrangement therefor |
US4340235A (en) * | 1979-10-04 | 1982-07-20 | Towmotor Corporation | Load responsive damping system |
US4352398A (en) * | 1980-02-27 | 1982-10-05 | International Harvester Co. | Circuit for pitch and tilt of dozer blade |
JPS57501959A (en) * | 1980-12-19 | 1982-11-04 | ||
SE465328B (en) * | 1990-02-19 | 1991-08-26 | Duotech Innovation Ab | COMPENSATION VALVE |
DE9103543U1 (en) * | 1991-03-22 | 1992-07-23 | J. D. Neuhaus Hebezeuge GmbH & Co, 5810 Witten | Valve for limiting the load that can be lifted on a hoist |
US7600612B2 (en) * | 2005-04-14 | 2009-10-13 | Nmhg Oregon, Llc | Hydraulic system for an industrial vehicle |
DE102015111178A1 (en) * | 2015-07-10 | 2017-01-12 | Jungheinrich Aktiengesellschaft | Standing platform for an industrial truck |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3007593A (en) * | 1958-11-21 | 1961-11-07 | Electro Hydraulics Ltd | Tilting mask assemblies for fork lift trucks |
US3355886A (en) * | 1965-10-23 | 1967-12-05 | New York Air Brake Co | Hydrostatic transmission |
-
1972
- 1972-12-27 US US00319068A patent/US3850323A/en not_active Expired - Lifetime
-
1973
- 1973-12-20 GB GB5922873A patent/GB1461914A/en not_active Expired
- 1973-12-21 JP JP48142555A patent/JPS5911519B2/en not_active Expired
- 1973-12-21 IT IT70836/73A patent/IT1000607B/en active
- 1973-12-22 DE DE2364198A patent/DE2364198A1/en active Pending
- 1973-12-27 FR FR7346560A patent/FR2212286B1/fr not_active Expired
Also Published As
Publication number | Publication date |
---|---|
FR2212286A1 (en) | 1974-07-26 |
DE2364198A1 (en) | 1974-07-11 |
JPS5911519B2 (en) | 1984-03-15 |
IT1000607B (en) | 1976-04-10 |
JPS49108758A (en) | 1974-10-16 |
US3850323A (en) | 1974-11-26 |
FR2212286B1 (en) | 1979-04-06 |
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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 |