Load sensing steering
US4354351A · kind A · utility
13Cited by
7References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1980 |
| Grant date | Oct 19, 1982 |
| Priority date | — |
| Expiry date | Sep 29, 2000 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/851
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Fluid in the relatively long lines (22, 24) between a control valve (16) and a fluid actuator (14) can become overly viscous in cold weather. Herein, fluid is circulated through such lines (22, 24), at least during cold weather, even when the fluid actuator (14) is not being used. This flowing is discontinued in response to shifting of the control valve (16) to a position where it motivates the actuator (14) and in response to pressure in the circulating path (20) exceeding a selected level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.