Change speed control structure for hydraulic transmission
US4907465A · kind A · utility
6Cited by
10References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1987 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Nov 12, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20486
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A change speed control structure for a hydraulic transmission comprising a rotary valve for controlling a plurality of hydraulic actuators, a shift lever extending through a crooked guide groove, and a relay assembly for transmitting movements of the shift lever to the rotary valve on a reduced scale. The guide groove includes three straight portions extending parallel to one another in series and offset in a transverse direction thereof, each straight portion including a plurality of change speed positions. An adjacent pair of the straight portions are interconnected end to end by a bight portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.