Clutch-brake steering mechanism for tractors
US4015619A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 24, 1975 |
| Grant date | Apr 5, 1977 |
| Priority date | — |
| Expiry date | Mar 24, 1995 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/87193
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Clutch-brake steering unit having hydraulically actuated cylinders for controlling same to control rotation of a track-drive sprocket in a crawler tractor. Specifically a clutch cylinder and a brake cylinder provided in the unit have an inlet-outlet port in common, and are so arranged on a spring-applied-brake, hydraulically-applied-clutch basis that a single pressure signal in the inlet-outlet port alternately operates the cylinders to apply the brake and release the clutch, to apply the clutch and release the brake, or by proper modulation to partially engage either, i.e., slip the clutch or drag the brake to intermediate degrees as desired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.