Gerotor motor and brake assembly

A hydraulic device comprising:

• a housing having a central opening, an inlet port, and an outlet port, the housing at least partially defining a pressurizable brake chamber;
• an output shaft received in the central opening and extending from the housing;
• a rotor assembly comprising a stator and a rotor having cooperating teeth defining fluid pockets, the rotor rotating and orbiting relative to the stator when hydraulic fluid is directed toward the fluid pockets, the fluid pockets being in communication with the inlet port and the outlet port;
• a wobble shaft connected to the rotor and to the output shaft;
• a brake assembly including a first brake disk connected to the output shaft, a second brake disk connected to the housing, a piston contacting at least one of the brake disks and a biasing member urging the piston toward the brake disks, wherein the inlet port connects to the brake chamber to supply pressurized fluid to the brake chamber through a fluid passage in the output shaft urging the piston away from the brake disks;
• and
• a valve disposed in a fluid path between the rotor assembly and the brake chamber, wherein the valve, the fluid path between the rotor assembly and the brake chamber, the housing and the inlet and outlet ports being configured such that when pressurized fluid is delivered into either port pressurized fluid is delivered the brake chamber to bias the piston away from the brake disks.

A hydraulic device comprising:

• a housing having a central opening, a first port, and a second port, the housing at least partially defining a pressurizable brake chamber connected with the each port via a fluid path within the housing;
• an output shaft received in the central opening and extending from the housing;
• a rotor assembly comprising a stator and a rotor having cooperating teeth defining fluid pockets, the rotor rotating and orbiting relative to the stator when hydraulic fluid is directed toward the fluid pockets, the fluid pockets being in communication with the first port and the second port;
• a wobble shaft connected to the rotor and to the output shaft to rotate the output shaft upon rotational and orbital movement of the rotor;
• a first brake disk connected to the output shaft;
• a second brake disk connected to the housing;
• a piston disposed in the housing;
• a first seal contacting the piston and the housing to separate the brake chamber from a cavity;
• a biasing member in the cavity urging the piston toward the brake disks;
• and
• a second seal cooperating with the housing and the output shaft to define a boundary of the brake chamber.