Abstract: A hydrostatic transmission is disclosed which includes a pump assembly in which a main pump, a charge pump, and an auxiliary pump are commonly housed and are drivingly connected to a single shaft assembly. An external fluid connection is provided through which fluid is directed from the auxiliary pump to a power take off, and valving is provided to short circuit the auxiliary pump when power is not demanded. Means of controlling the rate of operation of the valve are also provided to prevent excessive pressure rise rates at the outlet of the auxiliary pump upon actuation of the valving.

Abstract: A reduction drive unit, such as a wheel hub of the type including a fluid motor operable to rotate a shaft, a sun gear engaging the shaft, a planetary gear set engaging the sun gear, and a ring gear driven by the planetary gears to drive a rotating hub. The rotating hub includes a secondary hub portion surrounding the housing of the fluid motor, with a bearing set and an oil seal disposed between the motor housing and second hub portion. The oil seal has a large enough diameter, relative to the bearing set and adjacent portions of the motor housing and hub portion, that the motor housing may be removed from within the hub without damaging the oil seal.

Abstract: An accessory drive for rotating a fan used to cool a transversely mounted engine in a vehicle. A declutchable device, such as a viscous fan drive, has one element driven by the engine. The other element is connected to one end of the core of an elongated flexible shaft. The other end of the core is connected to the fan which is mounted in a known manner relative to the radiator of the vehicle to draw cooling air through the radiator and thereby cool the engine. The mounting of the declutchable device ahead of the flexible shaft allows for a reduction in the angular velocity of the core thereby increasing the life of the flexible shaft.

Abstract: A cushion valve arrangement for reducing the rate of pressure build up and relieving pressure rebounds in a fluid conduit. The valve housing defines first and second fluid ports, a fluid passage communicating therebetween, and a cushion passage communicating between the fluid passage and the first and second fluid ports. A valve spool is disposed in the fluid passage and defines an axial bore, within which is disposed a slideable valve member. When the pressure and flow suddenly builds up, the valve member is biased to an open position permitting high pressure fluid to pass through the axial bore and radially out through a passage in the spool into the cushion passage from which the fluid flows to the other conduit.

Abstract: An apparatus for manufacturing split pulleys includes a frame and a spindle assembly supported by the frame having an upper spindle and a lower spindle assembly for supporting for rotation a blank to be split therebetween. The lower spindle assembly includes a clamping mechanism having a screw means for drawing the upper spindle toward the lower spindle assembly and the lower spindle assembly toward the upper spindle to clamp the blank to be split therebetween. Bearing means are disposed between the frame and the spindle assembly for supporting the spindle assembly for rotation. The clamping means are operative to exert a clamping force between the upper spindle and the lower spindle assembly which is isolated from the frame and the bearing means to clamp a blank therebetween. A pair of rotatable tools are provided each of which has an axis of rotation parallel to the axis of rotation of the spindle assembly and each of which is associated with a motor means to effect rotation of the tools.

Abstract: A hydrostatic transmission system is provided which is particularly well adapted for use in driving vehicles employing skid-steer drives. In the system disclosed two independent hydrostatic transmissions, each employing a variable displacement motor are utilized; and a pressure responsive valve is employed to sense the magnitude of the load on each of the motors and to permit shifting the motors from minimum displacement toward maximum upon the sensing of a load in excess of a predetermined valve. The variable displacement motors of the system are configured to create forces during operation tending to urge the motors to maximum displacement, and the pressure responsive valve operates to bias the motors to minimum displacement when they are loaded at a magnitude less than the predetermined valve.

Abstract: A one-piece, molded fastener for self-retention in an apertured panel. The fastener provides a means for receiving and retaining a mounting member attached from one side of the panel and will seal the aperture from the other side of the panel. The fastener includes a slotted insertion member with a plurality of radially outwardly extending protuberances on one end thereof to self-retainingly engage the apertured panel and to receive said mounting means and a dished head on the other end thereof to engage the side of the panel from which the fastener is inserted and to seal said aperture.

Abstract: A controller for fluid pressure operated devices such as hydrostatic power steering systems. The controller is of the type having a primary, rotatable valve member and a follow-up valve member, and further comprising a fluid meter including a metering member coupled to the follow-up valve member. The controller is of the 5-port type, having a load signal port for communicating a steering load signal and maintaining a constant pressure drop across the main control orifice of the controller. The primary and follow-up valve members define a central reference plane oriented generally perpendicular to the axes of rotation of the valve members and the various ports and passages defined by the valve members are arranged in somewhat of a mirror image of each other about the reference plane.

Abstract: A rotary fluid pressure device of the type including agerotor gear set having an externally-toothed rotor orbiting and rotating within an internally-toothed stator. An intermediate shaft has one end in splined engagement with the rotor and the other end defining a large set of internal splines. The device includes an output shaft assembly, also defining a large set of internal splines. A large dogbone shaft having external splines at each end transmits torque between the intermediate shaft and the output shaft assembly. The intermediate shaft has an axial bore which communicates pressurized lubricant to the one end of the dogbone shaft, a portion of the pressurized lubricant flowing radially outward over the end of the dogbone and through the spline connection between the dogbone and the intermediate shaft.

Abstract: A molded, one-piece, self-locking, strain-relief bushing for mounting an electrical conductor to a panel having an aperture through which the conductor passes. The bushing is designed to mount the conductor substantially parallel to the panel on one side thereof and substantially perpendicular to the panel on the other side thereof. The bushing comprises two generally concave complementary portions adapted to be folded together in axially offset position over the conductor. One of the complementary portions is frangibly attached to the other and is adapted to be sheared therefrom for self-locking mounting of the conductor to the panel. The busing may be preassembled by hand and self-lockingly installed by a simple hammer blow.

Abstract: Improved mainshaft gear retainer means for a twin countershaft transmission having floating mainshaft gears positioned close together in groups of two and clutchable to a mainshaft one at a time by positive clutches which each have splines mateable with splines defined by each gear. The improved mainshaft gear retainer means prevents axial movement of two closely positioned gears and includes a snap ring axially interconnecting the gears, a thrust ring interposed between the axially interconnected gears, and a snap ring carried by each axially interconnected gear.

Abstract: A small gas turbine engine having a small, high speed shaft assembly including a central shaft member, a radial outflow compressor rotor secured to one end of the central shaft member with its inlet end disposed outboard of the shaft assembly, and a radial inflow turbine rotor secured to the other end of the central shaft member with its discharge end disposed outboard of the shaft assembly. The shaft assembly is supported at its ends, outboard of the rotors, by a pair of bearings which are axially secured but allow limited radial movement of the shaft assembly. An annular combustor is disposed between the turbine and compressor rotors in encircling relation to the central shaft member. Fuel is supplied to the combustor chamber from the exhaust end of the turbine through an axial passage in the shaft assembly opening at one end outboard of the exhaust end bearing and communicating at its other end with radial ports in the central shaft member arranged to sling fuel into the combustor chamber.

Abstract: A dual metering valve for a diesel engine pilot fuel injection system. The dual valve includes a pilot fuel metering valve, a main fuel metering valve, and a logic system. The pilot and main valves are of the spool type and each includes a solenoid for axially moving the spool from an unactuated position to an actuated position and a spring which returns the spool to an unactuated position when the solenoid is de-energized. The logic system controls the supply of unmetered fuel to a chamber in each spool and utilizes the position of the spools to provide the logic control. When the main spool is in its unactuated position it ports unmetered fuel to the pilot spool chamber; when the main spool is in its actuated position it blocks the supply of unmetered fuel to the pilot spool chamber. Pilot spool control is the reverse of the main spool control; i.e.

Abstract: An electromagnetic friction coupling includes an armature assembly, a pole assembly and a coil energizable to effect engagement of the armature and pole assemblies. The armature assembly includes an armature plate and a hub member which are coupled together by means for compensating for misalignment between the armature plate and hub members. The hub member is adapted to be connected to a shaft for rotation therewith and the armature member is disposed coaxially of the hub member and is connected for rotation therewith. The hub member and armature plate include outer and inner surfaces, respectively, which include a plurality of substantially semicircular recesses disposed therein. Each of the recesses disposed on the armature plate and the complementary recesses on the hub member define a plurality of substantially cylindrical openings therebetween each of which is adapted to receive a rotatable cylindrical pin therein to couple the hub member and armature plate.

Abstract: Reusable self-locking fasteners, and methods of metal fasteners wherein the self-locking characteristic is derived from a patch comprising a metal or metal alloy selectively applied to the threaded surface of the metal fastener in a spraying operation. The metallic patch may comprise a single metal or metal alloy or a composite of metals or metal alloys selectively bonded to the threaded surface of the metal fastener by single or multiple molten spraying operations respectively.

Abstract: A controller for fluid pressure operated devices such as power steering systems. The controller is of the type having a primary, rotatable valve member and a follow-up valve member, the valve members defining a neutral position. The follow-up valve member is coupled to the primary valve member for limited movement relative to the neutral position. The controller further comprises a fluid meter including a metering member for measuring the volume of fluid passing therethrough, the metering member being coupled to the follow-up valve member. The controller has an inlet port and first and second control fluid ports which may be connected to the opposite ends of the power steering cylinder.

Abstract: A biskeletal composite is created by forming a skeletal host body of reaction bonded silicon nitride, heating an infiltrant material, and applying pressure to such infiltrant to thereby force such infiltrant into the void volume of the porous host body. In one aspect of the method, the application of pressure is done rapidly to impart desirable characteristics to the composite.

Abstract: A unitary, permanently-locked, strain-relief bushing and a tool for applying same in an aperture in a support panel. The bushing comprises two generally concave, complementary portions interconnected by a flexible web. Each complementary portion comprises a shank segment having an especially configured shouldered end and a grip segment frangibly secured thereto axially extending from the shouldered end.The tool for applying the bushing into the aperture comprises an open-sided barrel, a plunger within the barrel and an especially configured mounting recess at the front end of the barrel. The mounting recess firmly receives the shank shouldered ends when the complementary portions are folded, concave portion to concave portion permitting an electric conductor or the like to be received in the bore thus defined by the complementary portions.

Abstract: A dual metering valve for a diesel engine pilot fuel injection system. The dual valve includes a pilot fuel metering valve, a main fuel metering valve, and a logic system. The pilot and main valves are of the spool type and each includes a solenoid for axially moving the spool from an unactuated position to an actuated position and a spring which returns the spool to an unactuated position when the solenoid is de-energized. The logic system controls the supply of unmetered fuel to a chamber in each spool and utilizes the position of the spools to provide the logic control. When the main spool is in its unactuated position it ports unmetered fuel to the pilot spool chamber; when the main spool is in its actuated position it blocks the supply of unmetered fuel to the pilot spool chamber. Pilot spool control is the reverse of the main spool control; i.e.

Abstract: A rotation indication system having an improved sensing device for determining the velocity of a rotating body is provided. The improved sensing device is tubular in configuration and includes a source of magnetic flux and two pole pieces that define a split magnetic field. The sensing device is mounted in close proximity to a rotor which is connected to the rotating body. The rotor has apertures which interrupt the split magnetic field producing an output signal with a frequency proportional to the velocity of the rotating body. The sensing device is oriented relative to the rotor apertures so that each pole piece is alternatively in register with an aperture to produce the desired output signal. Since the sensing device is tubular in shape, it can be rotated about its axis to obtain the desired orientation with the rotor apertures, thus permitting the use of the sensing device with a wide range of rotor diameters having various aperture spacings.