Piston-type machine

Claim 2

A piston-type machine comprising a journal having a longitudinal axis and a spherical bearing surface, channels for the respective input and output of a medium, and control ports in the periphery thereof connected to said channels; a cylinder block movably mounted on said spherical bearing surface of said journal in the plane of said control ports, and cylinder block having an axis intersecting said axis of said journal; at least one piston reciprocally mounted in said cylinder block for reciprocating radially of said journal, said piston having a flat surface at an end thereof spaced from said cylinder block; a housing having a part rotatably mounted about an axis parallel to and spaced eccentrically from said longitudinal axis of said journal, said housing part including a flat abutment surface slidably bearing said flat surface of said piston thereon; and means for adjusting said journal relative to said housing to vary the eccentricity of said journal relative to said axis of said housing part from one extreme value to another about a zero eccentricity.

Claim 3

A piston-type machine as set forth in claim 1 which further includes a stationary housing mounting said journal therein, said housing having an opening therein and said journal having a channel communicating with said opening of said housing; and a connecting part disposed between said channel of said journal and said opening of said housing for conveying a medium therebetween, said connecting part having a slide surface abutting said journal about said channel.

Claim 4

A piston-type machine comprising a journal having a longitudinal axis, channels for the respective input and output of a medium, and control ports in the periphery connected to said channels; a cylinder block rotatably mounted on said journal in the plane of said control ports and having a plurality of bores therein; a plurality of pistons respectively mounted in said bores of said block for reciprocating radially of said journal, each piston having a flat surface at an end projecting from said block; a drum rotatably mounted about an axis parallel to and spaced eccentrically from said longitudinal axis of said journal, said drum including a plurality of flat abutment surfaces each slidably receiving a flat surface of a respective piston thereon; a shaft for rotating said drum; a drive part connected between said drum and said block to permit relative radial movements between said block and drum during rotation thereof; and a stationary housing about said drum and wherein said drum includes a hollow bearing pin surrounding said journal and rotatably mounted in said housing, channels in said housing connected to said channels in said journal; bearings about said shaft and said pin of said drum, each bearing including segment-like compensation pockets therein facing said respective shaft and drum; and connection bores extending through said housing from said channels in said housing to said pockets to deliver medium thereto for hydrostatic pressure equalization.

Claim 5

A piston-type machine comprising a journal having a longitudinal axis, channels for the respective input and output of a medium, and control ports in the periphery connected to said channels; a cylinder block rotatably mounted on said journal in the plane of said control ports and having a plurality of bores therein; a plurality of pistons respectively mounted in said bores of said block for reciprocating radially of said journal, each piston having a flat surface at an end projecting from said block; a drum rotatably mounted about an axis parallel to and spaced eccentrically from said longitudinal axis of said journal, said drum including a plurality of flat abutment surfaces each slidably receiving a flat surface of a respective piston thereon; a shaft for rotating said drum; a drive part connected between said drum and said block to permit relative radial movements between said block and drum during rotation thereof; and a stationary housing about said drum and wherein said drum includes a hollow bearing pin surrounding said journal and rotatably mounted in said housing, channels in said housing connected to said channels in said journal; bearings about said shaft and said pin of said drum, each bearing including segment-like compensation pockets therein facing said respective shaft and drum; and connection bores extending through said housing from said channels in said housing to said pockets to deliver medium thereto for hydrostatic pressure equalization.