Motors: expansible chamber type – Cyclically operable – Biasing means moves distributor after predetermined travel
Patent
1988-06-27
1990-02-13
Look, Edward K.
Motors: expansible chamber type
Cyclically operable
Biasing means moves distributor after predetermined travel
91350, F01L 3102
Patent
active
048996386
ABSTRACT:
An automatically-reversing, fluid-actuated piston-and-cylinder unit includes a cylinder with a first section reciprocably receiving a piston and a second section reciprocably receiving a spool valve member. The piston is connected to a piston rod that extends slidably through the valve member. The valve member includes a plurality of lands that subdivide the cylinder second section into a plurality of fluid chambers. In a first position the valve member directs fluid to one side of the piston and in a second position it directs fluid to the other side of the piston. The valve member is automatically shifted between its first and second positions when the piston reaches its limits of travel.
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