To produce pulsating operation of vehicle wheel brakes in response to a continuous application of pressure to the brake pedal, a motor operated pressure switch controlled pulsating or pumping device is interposed between the brake master cylinder and the wheel brake cylinders of a hydraulic braking system. A ported piston within the pumping device is reciprocated and this action cyclically relieves pressure in the wheel brake cylinder lines and re-establishes braking pressure at a rapid rate of ...

An improved braking device for an electric motor incorporating a solenoid operated valve which meters air or fluid flow to a diaphragm, operable and effective to cause movement of a brake ring into and out of braking engagement with a companionate brake disc on a motor shaft.

A wheel cylinder body is made from a constant cross section extrusion having a bore forming the working chamber of the wheel cylinder without further finishing of the chamber wall. A block-like step section, formed as part of the extrusion on the outside of the cylinder portion, is drilled and threaded for appropriate inlet and bleeder screw connections, and mounting holes. The inlet and bleeder screw holes intersect the bore so that they do not engage the sealing cups of the wheel cylinder pist...

In a shock strut for an aircraft landing gear having inner and outer elongated telescoping tubes and a primary orifice selected and designed to attenuate the load level to a certain design condition which is compatible with the aircraft's structural threshold up to a certain overload sink speed, a load attenuating valve which opens when the design velocity is exceeded. The load attenuating valve includes secondary orifices held closed by a tension fuse which ruptures and opens the orifices in pa...

Disc brake sliding caliper retention is provided by a pair of torque bars fixedly mounted to a non-rotating member adjacent a rotating disc member. The torque bar pair constrains at least one sliding caliper from rotation with the disc when the caliper clamps down on the disc but allows axially movement relative to the rotational axis of the disc. The torque bars are mounted to the non-rotating member such that caliper forces resulting from engagement with the disc are perpendicular to the torqu...

A mechanical actuator for a disc brake is disclosed which provides an improved actuating mechanism which is less expensive and more reliable than prior art mechanical disc brake actuators. The actuator includes a lever which is provided with arcuate camming surfaces on opposite sides thereof. One of the camming surfaces is adapted to rollingly engage a substantially flat insert carried by the caliper housing. The camming surface on the opposite edge of the lever is substantially circular and is ...

A drum brake which comprises two brake shoes, an actuator situated between two first adjacent ends of the shoes and a fixed fulcrum block situated between the other two ends of the shoes. An adjuster is designed to increase the distance between the first ends of the shoes automatically as a function of the wear on the lining of the shoes. The adjuster comprises a lever pivoted at one end on a first of the shoes in the vicinity of the actuator. A pawl is pivoted on the first shoe and biased by a ...

A shock absorber of the direct acting hydraulic type is disclosed as comprising a reciprocable piston having a piston body, the piston body being formed with first and second sets of spaced flow ports, the sets of flow ports being concentrically oriented with the first set being spaced radially inwardly from the second set; a first valve seat on one end of the piston body adjacent the first set of flow ports; a first valve member engageable with the first valve seat to block fluid flow through t...

A brake block for a rim brake assembly of a bicycle which has a wheel rim. The brake block comprises an elongated body member of frictional material and has a face with cavities therein. The body has a longitudinal hole extending from end to end therein. Narrow holes or porous inserts connect the longitudinal hole with the face surface and the cavities.

A skateboard brake includes a heavy brush disposed below the skateboard and secured to a support bracket which is pivotally joined to a lower forward portion of the skateboard. The support bracket extends behind the rear wheels of the skateboard, and a plunger extends vertically from the support bracket through a slot in the rear end of the skateboard. The support bracket is resiliently biased upwardly to maintain the brush out of engagement with the pavement. A pedal is provided on the upper re...