Deceleration and pressure sensitive proportioning valve with high pressure damping
US4652058A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 24, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | May 24, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/282
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A proportioning valve assembly (10, 210) in a housing (12, 212) is pressure responsive to control the flow of fluid to a wheel brake cylinder. The proportioning valve (20, 220) is connected to a fluid channel (31, 231) opening into a reservoir (13, 213), a second valve (34, 234) being disposed in the channel (31, 231) and being engaged by an inertia sensitive ball (40, 240) located either on a ramp (17) or within a recess (235) of the second valve (234). The ball (40) is responsive to deceleration of the vehicle and moves up the ramp (17), or the ball (240) moves multi-directionally from the recess (235) to be both longitudinal and lateral deceleration responsive. Movement of the ball (40, 240) permits the second valve (34, 234) to close and prevent fluid communication between the fluid reservoir (13, 213) and the proportioning valve (20, 220) in order to vary the outlet pressure of the proportioning valve (20, 220) in response to deceleration or cornering of the vehicle. The proportioning valve (20, 220) includes a second piston (80, 280) which has a plunger end (82, 282) that extends within the channel (31, 231) and a bore (303) of a sleeve (301). The sleeve (301) has an orifice …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.