Vehicle spring brakes having reduced length
US10591009B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2018 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Apr 14, 2038 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2125/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A vehicle spring brake having a parking brake housing that defines a parking brake chamber and a service brake housing that defines a service brake chamber. A flexible membrane separates the parking brake chamber from the service brake chamber and flexes into and out of the service brake chamber based upon a pressure differential between an air pressure in the parking brake chamber and an air pressure in the service brake chamber. A pushrod extends out of the service brake housing when the flexible membrane flexes into the service brake chamber and retracts into the service brake housing when the flexible membrane flexes back out of the service brake chamber. A control valve controls the pressure differential to thereby control movement of the flexible membrane and the pushrod.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.