GB976247A - Lifting masts for industrial fork lift trucks - Google Patents
Lifting masts for industrial fork lift trucksInfo
- Publication number
- GB976247A GB976247A GB226061A GB226061A GB976247A GB 976247 A GB976247 A GB 976247A GB 226061 A GB226061 A GB 226061A GB 226061 A GB226061 A GB 226061A GB 976247 A GB976247 A GB 976247A
- Authority
- GB
- United Kingdom
- Prior art keywords
- members
- piston
- channel members
- cylinder
- mast
- 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
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
- E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
- E04C5/0636—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts
- E04C5/064—Three-dimensional reinforcing mats composed of reinforcing elements laying in two or more parallel planes and connected by separate reinforcing parts the reinforcing elements in each plane being formed by, or forming a, mat of longitunal and transverse bars
-
- 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
- B66F9/08—Masts; Guides; Chains
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Transportation (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
976,247. Masted lift trucks. ELECTRO-HYDRAULICS Ltd. Feb. 1, 1962 [Jan. 19, 1961], No. 2260/61. Heading B8H. A three-section mast of a fork-lift truck comprises a lower section including inwardly facing channel members 4, secured to the truck chassis, an intermediate section including outwardly facing channel members 7 slidably mounted on the members 4, and an upper section including outwardly facing channel members 10 slidably mounted on the members 7 and on which the load carriage 19 is slidably mounted, and the mast is extended by a hydraulic ram having a piston and hollow telescopic piston-rods, the innermost piston-rod being secured to the lower mast section. The channel members 4 are provided with rollers 14 guiding the channel members 7 which are provided with rollers 13 running on the members 4 and with rollers 17, 18 guiding the members 10. The upper mast section is substantially in the same transverse vertical plane as the lower mast section. The ram comprises a cylinder 24, a piston 25 secured to the channel members 10, and piston-rods 26, 27. On supplying fluid to the inlet 28, when the mast is fully retracted, the fluid passes through ducts 29, 30, 31 to the cylinder space 32 to raise the cylinder 24 on the piston 25, thereby raising the load carriage 19 to the top of the members 10, Fig. 3, by chains 36 which are anchored to the load carriage 19 and to members 37 on the piston 25 and which pass over pulleys 35 on the cylinder 24. The carriage is locked at the top of the members 10 and further increase in the fluid pressure causes the piston 25 to rise on the piston-rod 26 thereby raising the members 10 on the members 4. Further increase in the fluid pressure then causes the piston 25 and piston-rod 26 to rise on the piston-rod 27 thereby raising further the channel members 10 which pulls up the channel members 7 relative to the channel members 4 by engagement of stop blocks at the lower ends of members 10 which engage rollers at the upper ends of the channel members 7. The latch mechanism 38, Fig. 7, for locking the load carriage 19 at the top of channel members 10 comprises a lever 40 pivoted at 41 to a cross-brace between the members 10 and spring-urged in a clockwise direction. When the members 10 are raised after the cylinder 24 has risen to the top of the piston 25, one end 43 of the lever 40 is raised from an adjustable stop 44 mounted at the top of the channel members 4 thereby allowing the spring to urge the lever into engagement with a block 45 on the cylinder 24 to lock the piston and cylinder together.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB226061A GB976247A (en) | 1961-01-19 | 1961-01-19 | Lifting masts for industrial fork lift trucks |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB226061A GB976247A (en) | 1961-01-19 | 1961-01-19 | Lifting masts for industrial fork lift trucks |
Publications (1)
Publication Number | Publication Date |
---|---|
GB976247A true GB976247A (en) | 1964-11-25 |
Family
ID=9736416
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB226061A Expired GB976247A (en) | 1961-01-19 | 1961-01-19 | Lifting masts for industrial fork lift trucks |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB976247A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4846249U (en) * | 1971-09-30 | 1973-06-16 | ||
CN101786584A (en) * | 2009-01-23 | 2010-07-28 | Bt产品公司 | A mast structure for an industrial lift truck |
-
1961
- 1961-01-19 GB GB226061A patent/GB976247A/en not_active Expired
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS4846249U (en) * | 1971-09-30 | 1973-06-16 | ||
CN101786584A (en) * | 2009-01-23 | 2010-07-28 | Bt产品公司 | A mast structure for an industrial lift truck |
EP2210856A1 (en) * | 2009-01-23 | 2010-07-28 | BT Products AB | A mast structure for an industrial lift truck |
EP2380845A1 (en) * | 2009-01-23 | 2011-10-26 | BT Products AB | A mast structure for an industrial lift truck |
CN101786584B (en) * | 2009-01-23 | 2014-02-26 | Bt产品公司 | A mast structure for an industrial lift truck |
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