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AssigneeSprague Devices, Inc.
InventorsRichard J. Frigon, Allan E. McIntyre, Steven J. Stronczek, Dennis L. Berndt
Estimating the term…
A reciprocating piston fluid powered motor which has a fluid inlet and a fluid outlet. Reciprocation of the piston is controlled by a reciprocable valve spool which communicates with the fluid inlet and fluid outlet. The valve spool cooperates with a valve slide which is shiftable on said valve spool to control spool reciprocation. Fluid flow through the fluid inlet and outlet is controlled by electrically actuated solenoid valves connected in flow communication to the fluid inlet and a park port. An electric pulse width modulating switch is connected to each solenoid valve and has a plurality of positions to enable the piston to reciprocate at continuous low and high speed as well as in an intermittent mode. The switch may also be connected to an air powered washer fluid pump to deliver cleaning fluid on command.
An oscillating fluid powered motor system including a housing defining an inner chamber, said housing having an inlet port communicated to a fluid pressure source and an exhaust port, a piston reciprocally housed in said inner chamber, a motor shaft journaled in said housing, drive transmission means connecting said piston and said shaft, said housing having an inlet passage communicating said inlet port with a shiftable valve means for controlling communication between said inlet passage and each of a pair of control passages communicating said shiftable valve means with said inner chamber on opposite sides of the piston, said shiftable valve means being slidably mounted in said housing and shiftable in response to movement of said piston from a position communicating one of said control passages to the inlet passage and the other control passage to the exhaust port to a position communicating the other control passage to the inlet passage and the one control passage to the exhaust port, control electrically actuated valve means for controlling communication through said inlet passage from said inlet to said shiftable valve means, and control means for controlling said control electrically actuated valve means, said housing including a park passage communicating said inlet port with said shiftable valve means, and a park electrically actuated valve means controlling communication through said park passage to drive the shiftable valve means to a predetermined position to establish communication between said inlet passage, said control passages, and said exhaust port to drive said piston to a predetermined park position within said chamber.
Dependencies are inferred from the claim text.