Load sensing proportioning valve including inertia responsive element
US3954307A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1974 |
| Grant date | May 4, 1976 |
| Priority date | — |
| Expiry date | Jan 21, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T8/26
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A load sensitive proportioning valve for an automotive vehicle having a source of hydraulic fluid and front and rear hydraulically actuated brake systems, the proportioning valve being operable to modulate the brake pressure in one of the brake systems to provide for a reduced brake effect at the rear wheels relative to that at the front wheels to compensate for the weight transfer during braking, the valve including a modulating piston movable between positions opening and closing a flow path from the fluid source and the one brake system a first bias producing element for providing a force to move the piston element as a function of the magnitude of the deceleration of the vehicle, and a second bias producing element providing a force to move the piston in response to the fluid pressure of the one system and the modulated fluid pressure of the proportioning valve, whereby the modulating effect of the proportioning valve compensates for variations in loading of the vehicle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.