Landing gear control system for trailers
US8919738B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Jun 14, 2012 |
| Grant date | Dec 30, 2014 |
| Priority date | — |
| Expiry date | Jun 27, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B2211/20576
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A landing gear system for a trailer is described. The landing gear system includes two jacks, each with a first tubular body in which a second tubular body is telescopically mounted, a hydraulic chamber and a pneumatic chamber. The system includes a hydraulic fluid reservoir, a pneumatic fluid source, a pneumatic manifold in pneumatic fluid communication with the pneumatic source and in pneumatic fluid communication with said hydraulic reservoir and a hydraulic manifold in hydraulic fluid communication with the hydraulic reservoir. Pneumatically operated hydraulic pumps are included, along with a central control mechanism attached to the pneumatic manifold and disposed to simultaneously control pneumatic flow into the pneumatic chambers of the jacks and to pneumatically operated hydraulic pumps. Separate pneumatically operated hydraulic valve are provided to individually control hydraulic flow from the jacks.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.