Abstract: A seal assembly is provided for preventing excessive movement between two housings. Whenever two rotating shafts are coupled together, one shaft driving the other, there is generally some movement of the shafts and their respective machines relative to each other. It is preferable to cover the rotating shafts for safety and to provide lubrication. A flexible membrane is attached between a coupling guard adapter which is rigidly mounted to the housing of one piece of equipment, and a back-up ring. This assembly is then attached to a coupling guard which is itself rigidly mounted to a housing on the other piece of equipment. Finally, a membrane guard is attached to the coupling guard.

Abstract: A vehicle drive system including a wheel (16) to be driven, a suspension (18) having multiple relatively movable parts (24,26,28) and mounting the wheel for rotation and translation on a vehicle frame, a hydraulic rotary output motor (12) connected to the wheel for driving the wheel, a hydraulic pump (10) providing hydraulic fluid under pressure to the motor, a conduit (50) interconnecting the pump and the motor, and a flow control valve (40) in the conduit for controlling the flow. A switch (90) is associated with two of the relatively movable parts of the suspension for sensing relative movement therebetween indicative of the wheel losing contact with the underlying terrain and a valve (60) is responsive to the switch (90) for causing the flow control valve (40) to halt the flow of hydraulic fluid between the pump and the motor upon the wheel losing contact with the ground to prevent overspeed of the motor (12).

Abstract: A supplementary hydrostatic front wheel drive for a motor grader or the like utilizes pump flow from an already existing implement system as the source of supply to operate the drive wheel motors. The drive wheel motors are of the variable displacement over center type, and the system provides equal flow to both drive wheel motors to establish a synchronized rotational speed of both drive wheel motors. The displacements of the drive wheel motors are responsive to vehicle ground speed. The drive wheel components may include friction driving means which are responsive to the primary vehicle drive system.

Abstract: A method to provide a sealingly bonded filter housing comprises the steps of bonding a first end member to a first end of a body portion, forming an aperture in said body portion, and bonding a second end member to a second end of the body portion, to provide a sealingly bonded filter housing.

Abstract: An earthworking device comprises a support member having a work tool, such as an earthworking tip, detachably mounted on a forward end thereof. A pin is disposed in aligned bores formed through the support member and the work tool and a spring clip straddles the pin in locked engagement therewith. The spring clip is substantially encapsulated by an elastomeric member which aids in maintaining the spring clip in frictional engagement with the pin. The spring clip may comprise a "hair pin" or U-shaped configuration.

Abstract: A heavy vehicle, such as a tractor scraper, has oil cooled front disc brakes, and oil cooled rear disc brakes that may be used alone or in conjunction with the front brakes. A rear brake cooling circuit and a front brake cooling circuit, each of which has its own pump and heat exchanger, are cross-connected through a common reservoir, and both pumps and heat exchangers function whenever the rear brakes are applied. The rear circuit heat exchanger is an oil cooler with a fan, the motor for which is driven from the pump output and discharges to the cooler; and the motor may drive a bypass pump which draws some oil from the return line and passes it through the cooler.