Hydraulic transmission system having a main pump that can be actuated continuously
US8857172B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2011 |
| Grant date | Oct 14, 2014 |
| Priority date | — |
| Expiry date | Aug 12, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K23/08
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A hydraulic transmission system for a vehicle is provided. The system includes a main pump serving to feed with fluid at least one hydraulic motor for driving a vehicle mover member; an auxiliary pump, the main pump and the auxiliary pump being suitable for being actuated jointly; and a “bypass” connection between a delivery orifice of the auxiliary pump and an unpressurized reservoir. In addition, a first constriction is arranged on the bypass connection, and configured to maintain a pump protection pressure in a pump protection portion of the bypass connection. This pressure is applied to the main orifices of the main pump when said pump is actuated but is not delivering, thereby ensuring that the pump is protected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.