Piston pump with cam actuated valves
AssigneeCaterpillar Inc.
InventorRussell Henderson
Life of this patent
Estimating the term…
Abstract
A method of controlling a piston pump is disclosed. The method includes actuating a plurality of pistons housed within a cylinder barrel to cause each of the plurality of pistons to engage in reciprocating motion. Fluid supplied to each of the pistons may be regulated by changing a clock position of an intake cam ring to cause a plurality of intake valves to open and close relative to the clock position of the intake cam ring. Fluid discharged by each of the pistons may be regulated by changing a clock position of an exhaust cam ring to cause a plurality of exhaust valves to open and close relative the clock position of the exhaust cam ring.
Claims20
A piston pump, comprising:
- a housing;
- a cylinder barrel positioned within the housing and adapted to rotate about an axis of rotation by a drive shaft;
- a plurality of pistons arranged in the cylinder barrel, each piston configured to reciprocate within the cylinder barrel in a direction parallel to the axis of rotation of the cylinder barrel;
- a plurality of intake valves;
- an intake cam ring disposed in a first rotating path of each of the plurality of intake valves;
- a plurality of exhaust valves;
- an exhaust cam ring disposed in a second rotating path of each of the plurality of exhaust valves, and
- wherein the plurality of intake valves open and close relative to a clock position of the intake cam ring to regulate fluid supplied to each piston, and
- wherein the plurality of exhaust valves open and close relative to a clock position of the exhaust cam ring to regulate fluid discharged by each piston.
A method of controlling a piston pump, comprising:
- actuating a plurality of pistons housed within a cylinder barrel to cause each of the plurality of pistons to engage in reciprocating motion;
- regulating fluid supplied to each of the pistons by changing a clock position of an intake cam ring to cause a plurality of intake valves to open and close relative to the clock position of the intake cam ring;
- and
- regulating fluid discharged by each of the pistons by changing a clock position of an exhaust cam ring to cause a plurality of exhaust valves to open and close relative to the clock position of the exhaust cam ring.
A piston pump assembly, comprising:
- a housing;
- a cylinder barrel positioned within the housing and adapted to rotate about an axis of rotation by a drive shaft;
- a plurality of pistons mounted in the cylinder barrel, each piston configured to reciprocate within the cylinder barrel and in a direction parallel to the axis of rotation of the cylinder barrel;
- an inlet port to supply fluid to each of the plurality of pistons;
- an outlet port to receive fluid discharged by each of the plurality of pistons;
- a plurality of intake valves arranged relative to the axis of rotation of the cylinder barrel;
- an intake cam ring disposed in a first rotating path of each of the plurality of intake valves;
- a plurality of exhaust valves arranged relative to the axis of rotation of the cylinder barrel;
- and
- an exhaust cam ring disposed in a second rotating path of each of the plurality of exhaust valves,
- wherein the plurality of intake valves open and close relative to a clock position of the intake cam ring to regulate fluid supplied to each piston, and
- wherein the plurality of exhaust valves open and close relative to a clock position of the exhaust cam ring to regulate fluid discharged by each piston.
Dependencies are inferred from the claim text.