Axial piston machine constructed in a removable cartridge form to facilitate assembly and disassembly

Claim 2

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge.

Claim 3

The cartridge set forth in claim 1 wherein said means interconnecting said valve plate and said angle block comprises a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block.

Claim 4

The cartridge set forth in claim 2 wherein said one end of said tubular casing is fixed to said valve plate and the other end of said tubular casing has relative axial movement with respect to said angle block.

Claim 5

The cartridge set forth in claim 3 wherein said means interconnecting said valve plate and said angle block further includes means providing limited axial movement between said tubular casing and said angle block.

Claim 6

A fluid pressure energy translating device comprising a housing, said housing defining a cavity, a drive shaft having a portion thereof rotatably mounted in the housing and extending into said cavity, said cavity having an open end remote from said drive shaft, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a removable cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with said valve plate and in driving relation with said drive shaft, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, (e) means interconnecting said valve plate and angle block to form said removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft.

Claim 7

A fluid pressure energy translating device comprising a housing, said housing defining a cavity, a drive shaft having a portion thereof rotatably mounted in the housing and extending into said cavity, said cavity having an open end remote from said drive shaft, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a removable cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with said valve plate and in driving relation with said drive shaft, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, (e) means interconnecting said valve plate and angle block to form said removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft.

Claim 8

The fluid pressure energy translating device set forth in claim 5 including an annular seal mounted in said angle block for sealingly engaging said shaft.

Claim 9

The fluid pressure energy translating device set forth in claim 5 wherein said means interconnecting said valve plate and said angle block comprises a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block.

Claim 10

The fluid pressure energy translating device set forth in claim 7 wherein said one end of said tubular casing is fixed to said valve plate and the other end of said tubular casing has relative axial movement with respect to said angle block.

Claim 11

The fluid pressure energy translating device set forth in claim 8 wherein said means interconnecting said valve plate and said angle block further includes means providing limited axial movement between said casing and said angle block.

Claim 12

A fluid pressure energy translating device comprising a housing, said housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said one end, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel in abutment with said valve plate and adapted to be in driving relation with a drive shaft, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, ;p1 (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form a removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft.

Claim 13

A fluid pressure energy translating device comprising a housing, said housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said one end, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel in abutment with said valve plate and adapted to be in driving relation with a drive shaft, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, ;p1 (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form a removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft.

Claim 14

The fluid pressure energy translating device set forth in claim 10 wherein said means interconnecting said valve plate and said angle block comprises a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block.

Claim 15

The fluid pressure energy translating device set forth in claim 11 wherein said one end of said tubular casing is fixed to said valve plate and the other end of said tubular casing has relative axial movement with respect to said angle block.

Claim 16

The fluid pressure energy translating device set forth in claim 12 wherein said means interconnecting said valve plate and said angle block further includes means providing limited axial movement between said casing and said angle block.

Claim 17

The fluid pressure energy translating device set forth in claim 13 wherein said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block.

Claim 18

A fluid pressure energy translating device comprising a housing, said housing defining a cavity, a drive shaft having a portion thereof rotatably mounted in the housing and extending into said cavity, said cavity having an open end remote from said drive shaft, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a removable cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with said valve plate and in driving relation with said drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, (e) means interconnecting said valve plate and angle block to form said removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, longitudinally spaced annular seals on the periphery of said cartridge engaging the sides of the cavity in said housing.

Claim 19

A fluid pressure energy translating device comprising a housing, said housing defining a cavity, a drive shaft having a portion thereof rotatably mounted in the housing and extending into said cavity, said cavity having an open end remote from said drive shaft, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a removable cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with said valve plate and in driving relation with said drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, (e) means interconnecting said valve plate and angle block to form said removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, longitudinally spaced annular seals on the periphery of said cartridge engaging the sides of the cavity in said housing.

Claim 20

A fluid pressure energy translating device comprising a housing, said housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said one end, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel in abutment with said valve plate and adapted to be in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form a removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, a removable rod extending into said cartridge and maintaining said cylinder barrel and associate parts radially in said cartridge before the cartridge is inserted or after the cartridge has been removed.

Claim 21

A fluid pressure energy translating device comprising a housing, said housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said one end, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel in abutment with said valve plate and adapted to be in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form a removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, a removable rod extending into said cartridge and maintaining said cylinder barrel and associate parts radially in said cartridge before the cartridge is inserted or after the cartridge has been removed.

Claim 22

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge, a removable rod extending into said cartridge and maintaining said cylinder barrel and associate parts radially in said cartridge before the cartridge is inserted or after the cartridge has been removed.

Claim 23

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge, a removable rod extending into said cartridge and maintaining said cylinder barrel and associate parts radially in said cartridge before the cartridge is inserted or after the cartridge has been removed.

Claim 24

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge, said means interconnecting said valve plate and said angle block comprising a tubulr casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said tubular casing and said angle block, said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block.

Claim 25

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said housing supporting a bearing for said shaft externally of the cartridge, the portion of said shaft extending into said cartridge being unsupported by bearings within said housing or cartridge, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge, said means interconnecting said valve plate and said angle block comprising a tubulr casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said tubular casing and said angle block, said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block.

Claim 26

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge, said means interconnecting said valve plate and said angle block comprising a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said tubular casing and said angle block, said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block, spring means interposed between said tubular casing and said valve block.

Claim 27

In a fluid pressure energy translating device comprising a housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said drive shaft and a removable valve block closing the open end of said housing, said block having an inlet and outlet, a removable cartridge adapted to be positioned in said cavity, said cartridge comprising (a) a valve plate adapted to engage said valve block and an angle block, (b) a rotatable cylinder barrel adapted to be in abutment with said valve plate and in driving relation with a drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form said removable cartridge, said means interconnecting said valve plate and said angle block comprising a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said tubular casing and said angle block, said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block, spring means interposed between said tubular casing and said valve block.

Claim 28

The cartridge set forth in claim 19 including longitudinally spaced annular seals on the periphery of said cartridge engaging the sides of the cavity in said housing.

Claim 29

The cartridge set forth in claim 20 including an annular seal mounted in said angle block for sealingly engaging said shaft.

Claim 30

A fluid pressure energy translating device comprising a housing, said housing defining a cavity, a drive shaft having a portion thereof rotatably mounted in the housing and extending into said cavity, said cavity having an open end remote from said drive shaft, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a removable cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with said valve plate and in driving relation with said drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, (e) means interconnecting said valve plate and angle block to form said removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, said means interconnecting said valve plate and said angle block comprising a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said casing and said angle block, said means providing limited axial movement comprising a radially exending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block, spring means interposed between said tubular casing and said angle block.

Claim 31

A fluid pressure energy translating device comprising a housing, said housing defining a cavity, a drive shaft having a portion thereof rotatably mounted in the housing and extending into said cavity, said cavity having an open end remote from said drive shaft, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a removable cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel interposed between said valve plate and said angle block in abutment with said valve plate and in driving relation with said drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders with a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, (e) means interconnecting said valve plate and angle block to form said removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, said means interconnecting said valve plate and said angle block comprising a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said casing and said angle block, said means providing limited axial movement comprising a radially exending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block, spring means interposed between said tubular casing and said angle block.

Claim 32

A fluid pressure energy translating device comprising a housing, said housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said one end, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel in abutment with said valve plate and adapted to be in driving relation with the drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders; wlth a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form a removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, said means interconnecting said valve plate and said angle block comprising a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said casing and said angle block, said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block, spring means interposed between said tubular casing and said angle block.

Claim 33

A fluid pressure energy translating device comprising a housing, said housing defining a cavity into one end of which a drive shaft is adapted to extend, said cavity having an open end remote from said one end, a removable valve block closing the open end of said housing, said block having an inlet and outlet, and a cartridge positioned in said cavity between said valve block and drivingly engaged with said shaft, said cartridge comprising (a) a valve plate engaging said valve block and an angle block, (b) a rotatable cylinder barrel in abutment with said valve plate and adapted to be in driving relation with the drive shaft, said cylinder barrel having a plurality of piston cylinders, each of which has a port for communicating the cylinders; wlth a face of the valve plate, said valve plate having arcuate ports communicating with the cylinder ports and adapted to communicate with the inlet and outlet of said valve block when the cylinder barrel is rotated relative to said housing, (c) a piston in each said cylinder, (d) shoes connected to said pistons, said angle block having an inclined surface engaged by said shoes, and (e) means interconnecting said valve plate and angle block to form a removable cartridge such that the removable cartridge can be removed and replaced by disengaging the cartridge from said shaft, said means interconnecting said valve plate and said angle block comprising a tubular casing having one end thereof attached to said valve plate and the other end thereof attached to said angle block, said one end of said tubular casing being fixed to said valve plate and the other end of said tubular casing having relative axial movement with respect to said angle block, said means interconnecting said valve plate and said angle block further including means providing limited axial movement between said casing and said angle block, said means providing limited axial movement comprising a radially extending pin in said angle block and an opening in said tubular casing, said opening being elongated in an axial direction to provide limited relative axial movement between said tubular casing and said angle block, spring means interposed between said tubular casing and said angle block.

Claim 34

The fluid pressure energy translating device set forth in claim 23 including longitudinally spaced annular seals on the periphery of said cartridge engaging the sides of the cavity in said housing.

Claim 35

The fluid pressure energy translating device set forth in claim 24 including an annular seal mounted in said angle block for sealingly engaging said shaft.

Claim 36

The cartridge set forth in any of claims 1-4, 23, 17 in combination with a container for receiving the device, oil in said container, and a closure.