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US 4,285,643 AGranted
Rotary fluid pressure device
OwnerHarvey C. Whiteinventor
Life of this patent
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OwnerHarvey C. Whiteinventor
Estimating the term…
A rotary fluid pressure device is described as comprising a housing having fluid inlet and outlet openings and in the housing is a gerotor device having an external stator having internal teeth and a rotor within the stator having external teeth, one less in number than those on the stator. The rotor is eccentrically mounted with respect to the stator so that upon rotation of the rotor, the sealing engagement between the external and internal teeth forms expanding cells on one side of the line of eccentricity and forms contracting cells on the other side of the line. A drive shaft concentric with the rotor has a hollow end within the housing and a solid drive end outside of the housing. A wobble stick drivingly connects the rotor and the shaft and the wobble stick has a pivot point at its inner end connected by a rigid pivot pin with a central recess in the housing axially of the shaft which eliminates axial movement between the drive shaft and the rotor which would otherwise be caused by an uneven end formed by wear on the wobble stick. A manifold, fixed in the housing, provides a double balance pad diametrically opposite each of an inlet passage for conducting inlet fluid to each of the cells between the stator and rotor. Twelve shallow slots are hobbed over six angled holes conducting fluid to the expanding and contracting cells and over six radial holes leading to the balance pads, giving the required accuracy. A novel seal and thrust bearing structure, where the drive shaft exits from the housing, results in good concentricity of the seal carrier and a thrust bearing between the seal carrier and the adjacent end of the housing provides with a flow pumped by the bearing during rotation of the device, which results in a lower temperature on the seal and bearing.
In a gerotor structure having a housing, a set of gerotor cells, a valve structure, a gerotor structure and a wobble stick, the improvements comprising a separate manifold, said manifold fixed to the housing, the manifold containing a set of fluid passages to selectively communicate the set of gerotor cells to the valve structure, a rigid separate pin and said pin having its opposite ends engaging between the gerotor structure end of the wobble stick and the housing.
In a fluid pressure device having a housing, a drive shaft, a gerotor structure, a wobble stick drivedly connecting the drive shaft to the gerotor structure and fluid inlet and outlet means, the improvement of a wobble stick locating device comprising a rigid separate pin and said pin having its opposite ends engaging between the gerotor structure end of the wobble stock and the housing.
A rotary fluid pressure device comprising a housing, fluid inlet and outlet means in said housing, an internally toothed member, a coacting externally toothed member having one less tooth than said internally toothed member and having its axis positioned eccentrically relative to the axis of said internally toothed member, one of said members having orbital movement about the axis of said other member while forming expanding and contracting cells between said members, a drive shaft rotatably mounted in said housing and having a hollow end inside said housing and a drive connection as its other end, a rigid elongated wobble stick in said hollow end of said shaft, the ends of said wobble stick having respectively a first rotatable keyed driving connection with said shaft and a second rotatable keyed connection with said orbiting member and valve structure, passages responsive to said rotatable movement for communicating at all times part of said cells with one only of said fluid inlet and outlet means while communicating other of said cells with the other of said fluid inlet and outlet means, and a wobble stick locating device comprising a rigid separate pin having its opposite ends engaging between said orbiting end of said wobble stick and said housing.
In a rotary fluid pressure device having a housing, fluid inlet and outlet means in the housing, an internally toothed member, a coacting externally toothed member having a lesser number of teeth than the internally toothed member and having its axis positioned eccentrically relative to the axis of the internally toothed member, one of the members being rotatable and having orbital movement about the axis of the other member while forming expanding and contracting cells between the members, a rigid elongated wobble stick having first and second end portions, means connected to the first end portion of the wobble stick for rotating the same, means connecting the second end portion of the wobble stick to the member having rotatable and orbital movement, and valve structure and passages positioned in the housing for communicating some of the cells with the fluid inlet means while communicating other of the cells with the fluid outlet means;
A gerotor pressure device including in combination a plurality of stationary valve passages, each of said valve passages comprising a first hole and second hole, said first hole being a through bore, said second hole being a partial through bore and said first hole and said second hole intersecting at an acute angle to increase the relative apparent cross section of either hole and to increase the volume of fluid able to flow through said holes.
A gerotor pressure device including in combination a plurality of stationary valve passages, each of said valve passages comprising a pair of holes, one of said pair of holes being a through hole, the other of said pair of holes being a partial through bore and said pair of holes intersecting at an acute angle to increase the relative apparent cross section of either of said pair of holes and increase the volume of fluid able to flow through said holes.
In a fluid pressure device having a gerotor structure, a housing having an end face to which the gerotor structure is attached, the housing having a bore oriented normal to the end face and fluid inlet and outlet means in the housing including rotary valving means;
In a fluid pressure device having a gerotor structure, a housing having an end face to which the gerotor structure is attached, the housing having a bore oriented normal to the end face and fluid inlet and outlet means in the housing including rotary valving means;
In a fluid pressure device having a gerotor structure, a housing having an end face to which the gerotor structure is attached, the housing having a bore oriented normal to the end face, an end plate on the gerotor structure, a drive shaft, a thrust bearing having an inner and outer circumference, an end seal adjacent to the thrust bearing, a wobble stick drivedly connecting the drive shaft to the gerotor structure and fluid inlet and outlet means;
In a fluid pressure device having a gerotor structure, a housing having an end face to which the gerotor structure is attached, the housing having a bore oriented normal to the end face and fluid inlet and outlet means in the housing including rotary valving means;
Dependencies are inferred from the claim text.