Back to results
US 5,833,210 AGranted
Brake and clutch control system
AssigneeMidwest Brake Bond Company
InventorGordon Maurice Sommer
Life of this patent
Estimating the term…
Abstract
A control system for a press having a clutch and a brake includes a clutch control valve and a brake control valve. The clutch control valve operates the clutch by supplying pressurized air to the clutch. The brake control valve operates the brake by supplying pressurized hydraulic fluid to the brake. The brake control valve is activated by pressurized fluid from the clutch control valve in order to insure simultaneous release of the brake with engagement of the clutch as well as simultaneous application of the brake with disengagement of the clutch.
Claims6
A control valve comprising:
- a housing defining a fluid passage;
- a first piston movable within said housing between a closed position and an open position in response to a first pressurized fluid and in the absence of said first pressurized fluid, respectively, said first piston defining a piston bore;
- a second piston movable within said piston bore between a closed position where said fluid passage is closed and an open position where said fluid passage is open in response to a second pressurized fluid;
- and
- a spring only for biasing said second piston away from said first piston in the absence of said first pressurized fluid, said second piston being biased into said closed position solely by said first pressurized fluid acting on said first piston when said first piston moves along said second piston until said first piston abuts said second piston to move said second piston to said closed position.
2 more elements
Dependencies are inferred from the claim text.