Abstract: A rotary actuator includes one or more rotor vanes (40); an endplate (60); a corner seal (30) being positioned between the rotor vanes (40) and the endplate (60); a vane seal (20); a high pressure chamber and a low pressure chamber; and a single channel (22) extending from a lower portion of a vane seal groove (25) to a common channel (28) beneath the vane seal (20), wherein the high pressure chamber is in fluid communication with the corner seal (30) via the single channel (22) and the common channel (28). The common channel (28) may be formed in the rotor vane (40) or provided separately in a rotor vane flow sleeve (21) positioned along an interior surface of the rotor vane (40). The single channel (22) is machined from the bottom of the vane seal groove (25) to the area behind the corner seal (30).

Abstract: A rotary actuator includes one or more rotor vanes (40); an endplate (60); a corner seal (30) being positioned between the rotor vanes (40) and the endplate (60); a vane seal (20); a high pressure chamber and a low pressure chamber; and a single channel (22) extending from a lower portion of a vane seal groove (25) to a common channel (28) beneath the vane seal (20), wherein the high pressure chamber is in fluid communication with the corner seal (30) via the single channel (22) and the common channel (28). The common channel (28) may be formed in the rotor vane (40) or provided separately in a rotor vane flow sleeve (21) positioned along an interior surface of the rotor vane (40). The single channel (22) is machined from the bottom of the vane seal groove (25) to the area behind the corner seal (30).

Abstract: A turbofan gas turbine propulsion engine includes a system to transfer power from the low pressure turbine to the high pressure turbine and/or extract additional load from the low pressure turbine during certain turbofan engine operational conditions. The systems include a hydrostatic power transfer system that includes a hydraulic pump and a hydraulic motor coupled to the low pressure and high pressure turbine, respectively. The systems additionally include a mechanical and electrical load shifting/loading sharing systems that use clutches and gear assemblies to share and/or shift load between the turbines.

Abstract: A method of manufacturing a wear resistant shoe (26) includes upsetting (46) one end portion (38) of cylindrical member to work harden that portion to a substantial depth, machining (48) the cylindrical member portion to finished dimensions and surface hardening (56) a face (28 or 34) of the machined cylindrical member portion. The cylindrical member may comprise rod stock of a diameter less than the greatest diameter of the finished shoe and be upset or swaged to axially reduce and radially increase the dimensions of the one end portion. A hollow region (30) is formed in an opposite rod stock end portion and the periphery (50) of the hollow region is crimped about a rounded end (18) of the piston (20). The cold work done during the swaging or forming process provides a foundation for hardened faces comprising balance (28) and auxiliary balance (34) lands, forms a crude shape of the shoe, and imparts work hardening and wear property improvements.

Abstract: A method of manufacturing a wear resistant shoe (26) includes upsetting (46) one end portion (38) of cylindrical member to work harden that portion to a substantial depth, machining (48) the cylindrical member portion to finished dimensions and surface hardening (56) a face (28 or 34) of the machined cylindrical member portion. The cylindrical member may comprise rod stock of a diameter less than the greatest diameter of the finished shoe and be upset or swaged to axially reduce and radially increase the dimensions of the one end portion. A hollow region (30) is formed in an opposite rod stock end portion and the periphery (50) of the hollow region is crimped about a rounded end (18) of the piston (20). The cold work done during the swaging or forming process provides a foundation for hardened faces comprising balance (28) and auxiliary balance (34) lands, forms a crude shape of the shoe, and imparts work hardening and wear property improvements.

Abstract: A method of manufacturing a wear resistant shoe (26) includes upsetting (46) one end portion (38) of cylindrical member to work harden that portion to a substantial depth, machining (48) the cylindrical member portion to finished dimensions and surface hardening (56) a face (28 or 34) of the machined cylindrical member portion. The cylindrical member may comprise rod stock of a diameter less than the greatest diameter of the finished shoe and be upset or swaged to axially reduce and radially increase the dimensions of the one end portion. A hollow region (30) is formed in an opposite rod stock end portion and the periphery (50) of the hollow region is crimped about a rounded end (18) of the piston (20). The cold work done during the swaging or forming process provides a foundation for hardened faces comprising balance (28) and auxiliary balance (34) lands, forms a crude shape of the shoe, and imparts work hardening and wear property improvements.

Abstract: A method of manufacturing a wear resistant shoe (26) includes upsetting (46) one end portion (38) of cylindrical member to work harden that portion to a substantial depth, machining (48) the cylindrical member portion to finished dimensions and surface hardening (56) a face (28 or 34) of the machined cylindrical member portion. The cylindrical member may comprise rod stock of a diameter less than the greatest diameter of the finished shoe and be upset or swaged to axially reduce and radially increase the dimensions of the one end portion. A hollow region (30) is formed in an opposite rod stock end portion and the periphery (50) of the hollow region is crimped about a rounded end (18) of the piston (20). The cold work done during the swaging or forming process provides a foundation for hardened faces comprising balance (28) and auxiliary balance (34) lands, forms a crude shape of the shoe, and imparts work hardening and wear property improvements.

Abstract: A seal arrangement for a metering valve wherein a cylindrical member has a groove located on a face adjacent a seat which surrounds an opening connected to an inlet port. An elastomeric member has a base which is located in the groove with a projection that extends past the face on the cylindrical member. A ring is resiliently held against the elastomeric member by a sleeve to form a first static seal between the cylindrical member, retaining ring and sleeve. A piston located in the sleeve has a flange with first and second ribs thereon separated by a recess. An input member positions the piston such that the first rib engages the projection and compresses the elastomeric member before the second rib engages the seat to form a static seal between the piston and cylindrical member to assure that fluid flow between an inlet port and an exit port terminates when the piston is in a closure position.

Abstract: In a fluid flow control device having a housing with an entrance port connecting a source of fluid under pressure to a bore and an outlet port connecting the bore to a fluid system, a balanced dual poppet valve for controlling the flow of fluid between the entrance port and outlet port along parallel flow paths.

Abstract: A flow control device (12) for supplying first and second fluid distribution systems (16 and 18) with a constant percentage of fluid flowing from a single source of fluid (14). A housing (20) has a first bore (28) and a second bore (52) with a semi-cylindrical shaft (38) located in the first bore (28) to establish the relationship between fluid flow from an inlet orifice (32) and first and second outlet orifices (34 and 36). A shuttle valve (58-60) in the second bore (52) responds to the fluid flow from the first and second outlet orifices (34 and 36) and the respective back pressure to maintain the fluid flow through the first and second fluid distribution systems (16 and 18) in the same volume percentage as set by position of shaft (30) in the first bore (28). The shuttle valve (58-60) also provides a pressurizing function such that a minimum system pressure is required before any fluid flows to the first and second fluid distribution systems (16 and 18).

Abstract: A disc brake includes a positioning device (40) which is pressure responsive to control the amount of retraction for a piston (22) within the disc brake. The positioning device includes a plug (44) movably and sealingly carried within the piston (22) and a pair of legs (48, 50). The plug (44) cooperates with the pair of legs (48, 50) to move the latter to a position in spaced relation to a caliper housing (12) when the pressure level within a pressure chamber (28) is above a predetermined value. A spring (52) cooperates with the plug (44) and the pair of legs (48, 50) to engage the latter with the caliper housing (12) when the fluid pressure within the pressure chamber (28) is below the predetermined value.

Abstract: A floating-caliper disc brake (10) includes a non-rotating torque member (36) which carries the caliper (22) in fixed radial position relative to the disc (12) via a pair of resilient assemblies (50). The torque member and caliper each have matching grooves (44, 46) which, when placed in registry, define a pair of apertures (48) between the caliper and the arms (38, 40) of the torque member. The resilient assemblies are received in the apertures (48) so as to yieldably space apart the caliper and the torque member. Brake torque is transferred from the caliper to the torque member by abutment surfaces defined on the caliper and on the torque member. The resilient assemblies provide for ready axial movement of the caliper relative to the torque member in the brake release condition by providing a light spring force which centers the caliper between the arms of the torque member.

Abstract: A disc brake includes a pair of friction elements which cooperate with a caliper (26) to engage a rotor (10). A torque plate (12) movably supports the caliper via at least one pin (24). The pin is received with an aperture (40) on the caliper and a resilient member (44) within the aperture accommodates the clearance between the pin and caliper. The resilient member defines at least one rib (54 or 56) substantially disposed outside the aperture. The rib is deformable axially to generate a restoring force biasing the caliper and at least one of the pair of friction elements to return to a rest position.

Abstract: A disc brake assembly includes a caliper assembly which is operable to bias a pair of friction elements into engagement with a rotor. At least one resilient member cooperates with the caliper assembly and the pair of friction elements to releasably couple the latter to the caliper assembly. In addition, the one resilient member cooperates with the caliper assembly and one of the pair of friction elements to define an interlocking fit preventing movement of the caliper assembly in a radial direction relative to the rotor.