Abstract: The improved aircraft brake piston cap assembly (40, 40') comprises an aircraft piston (10) having a pair of openings (46) extending through the piston (10) and a piston cap (42) with a flange (44) fitted around the circumference of the piston (10 ) and having a pair of openings (48) aligned with the openings (46) in the piston (10 ) . A safety wire (50 ) may extend through the openings (46, 48 ) and be wrapped about a portion of the circumference of the piston cap so that the ends (52) are intertwined (53) to retain the safety wire (50) in place and the cap (42) attached to the piston (10), or a solid or spring pin (60, 60') may be press fitted into the openings (46, 48) of one of the piston cap (42) and piston (10) to attach the piston cap (42) to the piston (10) . The improved piston cap assembly (40, 40') permits components within the piston (10) to be extended to axially longer dimensions, and provides an improved, efficient and reliable attachment of the piston cap (42) to the piston (10).

Abstract: The high temperature and high pressure seal retainer ring (40) is a continuous ring (40) of polyetheretherketone having an inner diameter that is substantially equal to outer diameters of a rear portion of a movable piston (14). The ring (40) is generally wedge shaped and is received within a wedge shaped opening defined by a surface of a bore (12) receiving the movable piston (14) and a sloped axially extending surface (22) at the rear portion of the piston (14). The piston (14) includes a groove (18) adjacent the sloped axially extending surface (22) and receives therein a rubber seal (30).

Abstract: The tie-bar (10) comprises a pair of spaced-apart bushings (12, 14) each having end flanges (16) extending from a central cylindrical portion and a through opening (18) for connecting to flexing structures. A plurality of wires (20) comprises bands (22) of parallel wires (20) wrapped endlessly about the spaced-apart bushings (12, 14) provide a tie-bar (10) having bushings (12, 14) disposed at the ends and connected by a pair of spaced-apart side portions (24) of superimposed bands (22). The wires (20) are coated with a dry film lubricant so that the wires (20) are dry wrapped about the bushings (12, 14), and then a resin material (23) encapsulated about the dry wrapped wire bands (22) and bushings (12, 14). A body (26) of resin material disposed between the spaced-apart side portions (24) and the bushings (12, 14) maintains the spaced-apart relationship of the bushings (12, 14) by withstanding the compressive tension of the tightly wrapped wires (20).

Abstract: The tie-bar comprises a pair of spaced apart bushings each having end flanges extending from a central cylindrical portion and a through opening for connecting to flexing structures. A plurality of wires comprising bands of parallel wires wrapped endlessly about the spaced-apart bushings provide a tie-bar having bushings disposed at the ends and connected by a pair of spaced-apart side portions of superimposed bands. The wires are coated with a dry film lubricant so that the wires are dry wrapped about the bushings, and then a resin material encapsulated about the dry wrapped wire bands and bushings. A body of resin material disposed between the spaced-apart side portions and the bushings maintains the spaced-apart relationship of the bushings, by withstanding the compressive tension of the tightly wrapped wires. The wires are free to move relative to one another in response to tension and torsional forces exerted upon the tie-bar.

Abstract: A fluid pressure actuated piston is slidably carried in a fluid pressure actuated cylinder which, in turn, is slidably carried in a fixed carrier. Forward axial movement of the cylinder is restricted by a hydraulic pressure balance condition which is created by reducing the rearward surface area of the cylinder. The cylinder is maintained in a pressure balanced condition during the entire operation of the piston assembly. After the piston moves axially forward a predetermined distance, it engages the cylinder and urges the cyliner axially forward the same distance traveled by the piston. The piston's maximum axial movement is thereby extended by the distance the cylinder travels. The output force of the piston is substantially unaffected by the force imposed on the cylinder. Also, the cylinder does not provide any work force area.

Abstract: An automatic brake adjust and reset device particularly adapted for use in a multiple disc aircraft disc brake and having one or more spring loaded axially movable tubular members engaged by a movable cutting member connected to and actuated by a brake applying pressure plate. A pair of spaced apart fixed stops operatively connected to the tubular member serve to limit axial movement thereof to a brake released position under the influence of the spring load thereon and to a brake applying position under the influence of the brake applying pressure plate connected to the cutting member. The tubular member is fixed at the brake applying position whereupon continued movement of the pressure plate and cutting member attached thereto results in cutting or slitting of the tubular member by the cutting member to the extent necessary to compensate for axial wear of the multiple brake discs.

Abstract: A tie bar or flexible coupling particularly adapted to interconnect a helicopter rotor arm and a rotor blade is provided with a pair of spaced-apart end bushings connected by an endless belt which belt is defined by a plurality of spaced-apart parallel wires suitably integrated by a polyurethane adhesive. A pair of spaced-apart annular clips located between the end bushings surround the belt and draw opposite sides of the belt inwardly toward an axis extending through the end bushings about which axis the tie bar is adapted to twist under load. Opposing surfaces of each clip against which the belt sides bear are curved to form convex bearing surfaces causing the belt sides to assume a corresponding convex shape thereby deflecting the outer or edge wires less than the inner or center wires resulting in a lower tensile force imposed on the outer or edge wires than the inner or center wires during twisting motion of the belt about the axis thereof.