Valve return spring with filter support for a pneumatic brake booster assembly
US8746127B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2010 |
| Grant date | Jun 10, 2014 |
| Priority date | — |
| Expiry date | Feb 18, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T13/57
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A brake system includes a vacuum booster, a valve positioned within the vacuum booster, the valve including a valve member connected to a rod, the rod configured to move in a linear direction, an air filter positioned within the vacuum booster, and a return spring positioned within the vacuum booster. The return spring includes a first end and a second end with a plurality of coils extending between the first end and the second end. The first end includes a first coil and a second coil positioned radially outward from the first coil, and the first coil is configured to contact the rod and the second coil is configured to support the filter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.