GB502238A - Improvements in or relating to lifting platforms or hoists - Google Patents
Improvements in or relating to lifting platforms or hoistsInfo
- Publication number
- GB502238A GB502238A GB2648138A GB2648138A GB502238A GB 502238 A GB502238 A GB 502238A GB 2648138 A GB2648138 A GB 2648138A GB 2648138 A GB2648138 A GB 2648138A GB 502238 A GB502238 A GB 502238A
- Authority
- GB
- United Kingdom
- Prior art keywords
- links
- platform
- wheels
- hoists
- electromotor
- 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
- B66F7/00—Lifting frames, e.g. for lifting vehicles; Platform lifts
- B66F7/06—Lifting frames, e.g. for lifting vehicles; Platform lifts with platforms supported by levers for vertical movement
- B66F7/0641—Single levers, e.g. parallel links
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Handcart (AREA)
- Forklifts And Lifting Vehicles (AREA)
Abstract
502,238. Platform hoists. MULLER, W. Sept. 10, 1938, No. 26481. [Class 78 (iii)] Transportable hoists, having platforms connected to a base-plate by a linked parallelogram and raised by driving rollers into the angle between the inclined links and inclined surfaces on the base-plate, are constructed with curved inclined tracks of approximately cycloidal form to equalize the lifting effort throughout the whole range of the apparatus, thus enabling hydraulic power to be dispensed with in favour of a direct drive from a relatively distant electromotor, so that access to the underside of the supported load is facilitated. The electromotor (not shown) drives a chain wheel 16, which rotates the shaft 15 and also causes it to move axially to draw the shaft 12 forward and thus cause the links 11 to force the wheels 8 over the curved surfaces 7. Parallel wheels at the same time engage the links 3 and elevate the platform 2. Links 17 pivoted on the shafts 9 connect the wheels 8 to similar wheels at the other end of the platform. In a modification, the track 7 descends slightly after reaching its highest point, before the platform reaches stability in its raised position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2648138A GB502238A (en) | 1938-09-10 | 1938-09-10 | Improvements in or relating to lifting platforms or hoists |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2648138A GB502238A (en) | 1938-09-10 | 1938-09-10 | Improvements in or relating to lifting platforms or hoists |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB502238A true GB502238A (en) | 1939-03-14 |
Family
ID=10244317
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2648138A Expired GB502238A (en) | 1938-09-10 | 1938-09-10 | Improvements in or relating to lifting platforms or hoists |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB502238A (en) |
-
1938
- 1938-09-10 GB GB2648138A patent/GB502238A/en not_active Expired
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