Abstract: A testing device for testing Hall-Effect type speed and proximity sensors and their associated pulse detection systems is provided by the present invention. The device includes a housing containing an internal battery, an LED display, an input connector, an output cable, a power switch, a test function switch, and a built in reference magnetic label. The magnetic label is polarized with a reference pattern such as alternating north and south magnetic poles. To test a Hall-Effect sensor, the sensor output is connected to the testing device and the sensor is swiped along the magnetic strip. The output of the sensor is then displayed such that it can be examined to determine if the sensor is working properly. A pulse generator is included that produces a known pulse train that is used to evaluate an associated pulse detection circuit. The output of the pulse detection circuit in response to the reference pulse train is examined to determine if the pulse detection circuit is functioning properly.

Abstract: A pressure compensation mechanism for a gerotor motor is disclosed, which mechanism includes a shuttle valve that selectively interconnects either port to a single pressure chamber and thus to compensate for any pressure-induced imbalances in the device.

Abstract: A mechanically applied spring release brake (50) having a single small diameter dynamic seal (46) is integrated into a wheel and tire to provide for a small package utilized in forklifts, wheel trucks and other industrial vehicles.

Abstract: A sensor unit for a rotating shaft, which unit uses its inner opening directly in contact with the outer surface of the rotating shaft in order to precisely and repeatedly radially align a sensor to such shaft.

Abstract: A sensor unit for a rotating shaft of a device includes a body having an axial opening and a second opening. The axial opening receives the rotating shaft and contacts an outer surface of the rotating shaft to precisely and repeatedly radially align a sensor to the shaft. The second opening receives the sensor.

Abstract: A selectively engageable friction mechanism such as a brake assembly including hard anodized brake disks having a single cross section and a bias assembly including a single spring, in the preferred embodiment such spring being a belleville spring

Abstract: A spring applied/hydraulically released brake mechanism for a mechanical brake including an actuator lever extending between a movable piston, which piston is normally biased to a closed position by a spring with a selective pressurization of a chamber on the other side of the piston deactivating the mechanical brake through the lever.

Abstract: A sensor unit for a rotating shaft, which unit uses its inner opening directly in contact with the outer surface of the rotating sheft in order to precisely and repeatedly radially align a sensor to such shaft.

Abstract: A selectively engageable friction mechanism such as a brake assembly including hard anodized brake disks having a single cross section and a bias assembly including a single spring, in the preferred embodiment such spring being a belleville spring.

Abstract: A spring applied/hydraulically released brake mechanism for a mechanical brake including an actuator lever extending between a movable piston, which piston is normally biased to a closed position by a spring with a selective pressurization of a chamber on the other side of the piston deactivating the mechanical brake through the lever.