Leveling valve
Patent
·
OSTI ID:6966278
This patent describes a leveling valve adapted to respond to changes in vertical distance between a vehicle chassis and at least one axle to adjust the air pressure of an air spring between the axle and the chassis. The valve comprising: a valve body; a chamber within the valve body; a supply port in the valve body communicating with the chamber and adapted to be connected to a source of pressurized air; an exhaust port in the valve body; at least one delivery port in the valve body communicating with the chamber, and adapted to be connected to at least one air spring bag; a piston reciprocally mounted in the chamber; a mormally closed check valve means between the supply port and the chamber and in the path of the piston whereby the check valve means is opening position in which fluid can flow from the supply port to the delivery port; fluid passage means through the piston for accommodating fluid flow from the delivery port to the exhaust port; means responsive to changes in the vertical distance between the chassis and axle for controlling reciprocation of the piston; a shaft rotatably supported by the valve body with its axis generally normal to the axis of the piston, and eccentric ping, means for mounting the eccentric pin on an end of the shaft, and means responsive to changes in the vertical distance between the chassis and axle for rotating the shaft.
- Assignee:
- Ridewell Corp., Springfield, MO
- Patent Number(s):
- US 4886092; A
- Application Number:
- PPN: US 7-261119A
- OSTI ID:
- 6966278
- Country of Publication:
- United States
- Language:
- English
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