Fluid control system for tractor trailer brake system
US5673977A · kind A · utility
Inventor
Key dates
| Filing date | Nov 27, 1996 |
| Grant date | Oct 7, 1997 |
| Priority date | — |
| Expiry date | Nov 27, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/043
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A fluid control system for use with vehicles, in particular, trailers, includes a branch conduit (19, 25, 42, 80, 96) which is to be connected to a pressure supply line (20) and a control line (22) to enable priming of the control line (20) so that signals generated upon application of the vehicle brake pedal are more quickly transmitted to the trailer brakes. This overcomes problems associated with delay in application of the trailer brakes. An electrically operated solenoid valve (11) controls fluid flow through the branch conduit so that upon application of the vehicle brake pedal the solenoid valve is operated to open the branch conduit to allow pressurized fluid to flow from the supply line (20) to the control line (22) for a predetermined time period to prime the control line (22). Pressurized fluid from the branch supply conduit is directed longitudinally down the control line (22) by a longitudinally arranged outlet (35, 57) so that substantially all of the fluid is directed to backfill the control line. The system may be embodied in a block arrangement in which bores are drilled in a block housing and in which the branch conduit (19, 25) is formed by passages drilled in th…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.