Control valve lock for a vehicle air brake system
US5688027A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 11, 1996 |
| Grant date | Nov 18, 1997 |
| Priority date | — |
| Expiry date | Jul 11, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60R25/08
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control valve lock for a vehicle air brake system is described whereby to secure the parking brakes of the vehicle in an engaged locked position. The lock is securable to the valve actuating rod on the dashboard control valve and is comprised essentially of a block-like base member to which is secured a large actuating knob. A lock cylinder extends through a portion of the knob and the base member and aligns internal locking cavities between the connecting shaft of the knob and the base member whereby the locking dog of the lock cylinder can engage in the cavities to secure the knob in a retracted position whereby to lock the brakes of the vehicle. In order to unlock the brakes, it is necessary to insert a key in the key cylinder to liberate the knob to permit it to be pushed inwardly whereby the dashboard control valve can supply air to the parking brake cylinder to release the brakes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.