Hydraulic gerotor motor with integral shuttle valve
AssigneeParker-Hannifin Corporation
InventorJames L. Walls
Life of this patent
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Abstract
A hydraulic motor comprising a housing having inlet and outlet ports and an access port for connecting a pressure fluid to an accessory of the motor, such as a brake. A shuttle valve integrally contained within the housing selectively communicates the pressure at one of the inlet port or the outlet port to the access port. In addition, the housing has at least two axial sections that are sealed at a parting line therebetween, and the shuttle valve is inserted through an opening in one section so that when the sections are joined, the opening is sealed at the parting line. A ring of bolts holds the sections together, and the shuttle valve is contained at least partially within the envelope formed by the ring.
Claims20
A hydraulic motor having a housing, a chamber contained within the housing, a drive assembly including a rotor located in the chamber and a drive shaft extending from the housing, the housing having at least two inlet/outlet ports connected to a fluid circuit in the housing, an access port connected to the fluid circuit via a shuttle valve in the housing that selectively transmits a pressure from one of the inlet/outlet ports to the access port, wherein a pressure difference between the inlet/outlet ports causes the shuttle valve to open a first passage to the access port from the inlet/outlet port with the higher pressure and to dose a second passage to the access port from the inlet/outlet port with the lower pressure.
A hydraulic motor having a housing, a chamber contained within the housing, a drive assembly including a rotor located in the chamber and a drive shaft extending from the housing, the housing having at least two inlet/outlet ports connected to a fluid circuit in the housing, an access port connected to the fluid circuit via a shuttle valve in the housing that selectively transmits a pressure from one of the inlet/outlet ports to the access port, wherein the shuttle valve is located in a passage that is parallel to a longitudinal axis of the housing.
A hydraulic motor having a housing;
- a shuttle valve in the housing;
- a chamber contained within the housing;
- and a drive assembly including a rotor located in the chamber and a drive shaft extending from the housing;
- the housing having at least two axial sections meeting at a parting line, the housing having access, inlet and outlet ports opening to an external face of the housing, the inlet and outlet ports being connected to a fluid circuit contained in the housing, the fluid circuit being connected to the access port such that the shuttle valve selectively transmits a relatively higher pressure from one of the inlet and outlet ports to the access port, and the shuttle valve being located in a bore that opens to the parting line between the axial sections of the housing so as to be internal to the housing when the axial sections of the housing are joined together.
A hydraulic motor having a housing;
- a chamber contained within the housing;
- a drive assembly including a rotor located in the chamber;
- and a drive shaft extending from the housing;
- the housing having an access port, at least two inlet/outlet ports respectively connected to first and second pressure zones of a fluid circuit in the housing, and a passage extending between the first and second pressure zones of the fluid circuit;
- and a valve disposed in the passage and movable by a difference in pressure between the first and second zones to connect the access port to the zone with the higher pressure and shut-off the access port from the zone with the lower pressure.
Dependencies are inferred from the claim text.