Reciprocating piston fluid powered motor
AssigneeSprague Devices, Inc.
InventorRobert F. Jaske
Life of this patent
Estimating the term…
Abstract
A reciprocating piston fluid powered motor providing great flexibility in its mounting and the location of the motor shaft and fluid inlet lines. Relatively few component parts are employed and a number of the components are used as-cast or with minimal machining operations required.
Claims8
An oscillatory fluid powered motor comprising a motor housing formed of two similar cup-shaped parts secured together at their open ends to define an elongated bore therein, said housing parts having complementary passages therein and a fluid outlet, a piston unit having spaced piston heads slidable in said bore and an intermediate reduced dimension section connecting said piston heads, a motor shaft journaled for rotation in said housing between said housing parts, drive transmission means connecting said motor shaft and said piston unit for rotationally driving said motor shaft in response to linear motion of said piston unit, a valve unit having a housing secured to and transverse of said motor housing between said motor housing parts and having an elongated bore transverse of said motor housing bore communicating with a fluid inlet and a valve spool slidable in said valve bore, and valve housing having passages therein controlled by said valve spool and so arranged and communicating with said motor housing passages and with said fluid inlet and said fluid outlet that said piston unit and spool valve are caused to reciprocate in response to fluid pressure supplied at said inlet.
An oscillatory fluid powered motor comprising a motor housing formed of two similar cup shaped parts secured together at their open ends to define an elongated bore therein tapering slightly from the center to the ends thereof, said housing parts having complementary passages therein and a fluid outlet, a piston unit having spaced interconnected pistons substantially concentric in and having slight clearance in said bore and each having a circumferential groove, a motor shaft journaled for rotation in said housing, drive transmission means connecting said motor shaft and said piston unit, a resilient sealing ring received in each piston groove and having a normal outer diameter at least equal to the diameter of the large diameter portion of said housing bore and a thickness greater than a radial space between the bottom of a groove and the adjacent part of the housing bore at the small diameter portion of said housing bore and greater than the clearance between the piston and the housing bore at the larger diameter portion of the bore, and a valve unit having a valve housing secured to said motor housing between said motor housing parts and a fluid pressure actuated valve element therein, said valve housing having a fluid inlet, said valve element controlling fluid flow from said inlet and through said passages to said outlet to reciprocate said piston unit in said motor housing.
Dependencies are inferred from the claim text.