Force limiting gear reducer for lifting pinion of self-elevating platform
US4574650A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Aug 22, 1984 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Aug 22, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19684
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A force limiting gear reducer for a lifting pinion of a self-elevating platform, comprising a gear reducer divided in two parts, a first of said parts being directly connected to a pinion shaft and pinion support and a second of said parts comprising a prime reducer with brake and motor connected to an input shaft of the first reducer, a reaction member on the prime reducer in the form of a geared wheel meshing with a pair of guided racks on opposite sides thereof, which are axially connected each to at least one hydraulic cylinder, and means to control the oil pressure in the hydraulic cylinders, said geared wheel being both internally and externally toothed, said external teeth being in mesh with said pair of racks, and said internal teeth meshing with a plurality of planet gears all of which planet gears are in mesh with a sun gear on said input shaft.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.