Abstract: Linkage which extends between right and left brake pedals and a valve construction provided with an outwardly extending shiftable shaft and a pair of valves disposed to either side of the shaft. A bolt assembly passes through one end of the shaft and mounts a yoke for rocking movement, the yoke having ends equally offset from the valves. Right and left substantially identical linkages are employed, each linkage including a push rod mounted for limited adjustable sliding movement in a trunnion carried by a bifurcated arm of a bell crank. The other bell crank arm is connected to an end of the yoke by a ball joint assembly, one end of a tubular intermediate portion being adapted to bear against a valve.

Abstract: A filter assembly utilizing a plurality of stackable filter head units which permit parallel flow through filter elements mounted within filter bowls, there being one filter element and filter bowl mounted on each of the stackable filter head units. An improved filter head construction is employed which permits a plurality of substantially identical filter head units to be mounted adjacent each other to provide the desired flow capacity, each of the filter head units being so designed that it can be readily manufactured.

Abstract: A frame for supporting implements on a vehicle capable of deflection to absorb torsional and bending stresses applied by the implements and method of making same.

Abstract: A three-point implement hitch employed to secure an implement forwardly of a propelling tractor. The implement hitch includes a frame on which a pair of forwardly extending lower links are mounted for lateral adjustment. An intermediate portion of each of the lower links may contact a rub block on the hitch frame. The forward ends of each of the lower links rotatably carries an apertured ball which is disposed about a hitch pin on an implement and is secured in place by a lynchpin. When the rearward ends of the lower links are adjusted towards each other and mid-portion of each of the lower links is moved adjacent its associated rub block thus stabilizing the implement and controlling side to side sway. The implement hitch frame can be readily attached to and detached from a tractor.

Abstract: Window latching apparatus for securing a cab window above the head of an operator includes a rotatable cam mounted to a side roof rail of the cab. A pin projecting from frame of window engages a slot in the cam. Lever means including spring biasing means are provided to interlock with cam to retain window in safely stowed position overhead of the operator.

Abstract: An improved pressure control valve which provides equal damping force in both directions of movement of the valve spool and which also provides negative feedback to partially negate fast transients leading to valve instability. The pressure control valve includes a valve body having an inlet chamber and an enlarged adjacent damping chamber. A valve spool is received within the chambers, the spool having a first portion and a second radially outwardly extending portion adjacent the first portion and disposed within the damping chamber. As the valve spool is shifted to an open position fluid will be expelled from the damping chamber through a first orifice, and as the valve spool returns towards its closed position fluid will be expelled through a second orifice, the orifices having cross-sectional areas proportionate to the volume of fluid being expelled so that equal damping will be obtained in either direction of movement of the valve spool.

Abstract: A pressure control valve having improved damping means which permits the valve to have a high degree of response combined with improved stability. The valve includes a valve spool mounted within a valve body and shiftable against spring pressure from a normal position to a nominal design operating position wherein discharge ports in the valve body are placed in communication with the inlet port. First damping means are provided which become operational only as the control member attains the nominal design operating position, the first damping means including an orifice in the valve body and a ring carried by the valve spool, the ring overlying the orifice when the valve spool attains its nominal design operating position.

Abstract: A brake assembly for engaging the periphery of a rotatable member, the brake assembly being energized by rotation of the rotatable member in either direction. The brake assembly includes a movable brake shoe which may be forced into contact with the periphery of the rotating member. The brake shoe has spaced apart rollers which are held in engagement with converging ramps on a wedge block. The brake shoe is permitted to shift laterally with respect to the ramps, and as the brake shoe engages the rotating member one of the rollers will move downwardly along one of the ramps to affect self-energization of the brake shoe. The wedge block is provided with a downwardly extending projection which is disposed between the converging ramps, the projection being received within a recess formed in the brake shoe, the recess being of greater width than the projection.

Abstract: The earthworking implement has a primary frame section and a wing frame section attached to each side of the primary frame section. A folding mechanism is provided for folding each wing frame section to a transport position. The folding mechanism includes a first arm pivotally attached to the primary frame section. A hydraulic cylinder is attached to the primary frame section and to the first arm for pivoting the first arm relative to the primary frame section. A second arm is attached to the first arm and to the wing frame section. The connection between the first arm and the second arm is a lost motion connection. The first arm has a stop which engages the primary frame section and a stop which engages the wing frame section when the wing frame section is in the transport position.

Abstract: A high density polyethylene molding frames an opening in a casting through which hydraulic hoses must pass to protect the hoses from abrasion in contacting the edges and sides of the casting opening. The molding is flexible and resilient to enable it to be snapped in and out of the opening in the casting while providing a generally frictionless surface against which the hoses may be guided in their normal movement through the opening under operating conditions.

Abstract: A control mechanism for shifting the differential lock mechanism of a vehicle between unlocked and locked positions. The differential lock is hydraulically operated and is controlled by a two position hydraulic valve. A control link extends from the hydraulic valve to the control mechanism. When the control link is disposed in a retracted position the differential lock will be disposed in an unlocking position, and when the control link is disposed in an extended position the differential lock will be in its locking position. The control mechanism includes a pivoted cam-like member and a pivoted catch member provided with cooperating surfaces, biasing means operable to bias the cam-like member to a retracted position and actuator means operable to shift the cam-like member away from its retracted position through engaged and stop positions to a release position.

Abstract: A valve control mechanism for operating a plurality of valves in a bank of valves which can be selectively operated by interchangeable lever arrangements one of which has a separate lever for each valve and another of which has a single lever for a pair of valves. The bank of valves and the lever arrangements are detachably removable independently of each other to permit easy servicing and selecting of the desired lever arrangement or to change the sequence of valve operation.

Abstract: A hand control arrangement for a hydrostatic transmission having a single manually actuated control to vary the driving direction and speed of the transmission and wherein the movement of the hand control lever is limited to a predetermined path making it possible for the operator to sense various speed levels of the transmission.

Abstract: A fabricated corner structure having a single piece outer member and two piece inner member construction for receiving tubular members generally perpendicular to each other encompassed by the inner and outer members with a vertical support member perpendicular to the tubular members welded to the outer member. The three tubular members form the corner of a ROPS structure.

Abstract: In a vehicle a safety frame and a cab, the cab entirely enclosing a personnel compartment is supported within the safety frame by resilient support members while the frame is rigidly mounted on the vehicle. Each of the support members includes at least one layer of elastomeric material secured between each of the leg members of the cab panel adjacent thereto for resiliently supporting the cab on the leg members such that in one embodiment the elastomeric material of each support member is loaded only in shear by the cab and in both compression and shear in a second embodiment, and the support members are in a plane containing the center of gravity of the operator and cab.

Abstract: An upper link storage clip for securely maintaining the upper link of a tractor three-point hitch in its storage position without side to side movement, the storage clip being so designed that the upper link can be readily placed within it by a one hand operation. The upper link storage clip utilizes a spring biased pivoted hook to maintain the upper link between a pair of rearwardly extending spaced apart arms when the upper link is in its storage position. The rearward surface of the pivoted hook is provided with a cam surface so that as the upper link is forwardly swung towards its storage position the pivoted hook will be cammed to an open position permitting the introduction of the upper link between the pair of arms, the spring causing the pivoted hook to swing to its closed operative position when the upper link attains its storage position.

Abstract: A hinge assembly for the hood of a vehicle engine compartment which applies a spring force to counterbalance the weight of the hood so that the hood moves to an initial open position without the assistance of manual effort and can be moved from the initially open position through an arc greater than 90 degrees with a substantially constant manual force.

Abstract: An engine has a swingable hood with an exhaust stack and air inlet drain cap mounted thereon for swinging therewith which are operative with a muffler outlet and an air cleaner inlet, respectively, when the hood is in an operative position enclosing the engine of a vehicle on which the hood is mounted. A deflector is located between the muffler and air cleaner and oriented to deflect cooling air for the muffler to exhaust vents and the stack which stack forms an annulus around the muffler outlet to give a jet pump type action to enhance the draft for the stack which entrains the effluent from the muffler outlet while at the same time providing a radiant and convective heat shield for the air cleaner.

Abstract: A foot pedal control arrangement for the transmission and throttle of a vehicle employing a pair of pedals movable independently of each other in an initial range to control the transmission of the vehicle and movable in a second range to control the throttle and engine speed of the vehicle.