A radial shaft seal includes a powder coating on a shaft and a sealing lip that lands on the powder coating. The powder coating is formed of a thermosetting resin and a filler material. The filler material has a melting point above the cure temperature of the thermosetting resin. The powder coating may be porous. The powder coating may be made up of dry powder particles adhered to one-another with spaces in between. The filler may be present in an amount between 15% and 35% within the individual particles. The powder coating is adapted to wear away at locations of maximum interference with the sealing lip while continuing to provide a durable seal. This wear behavior compensates for shaft wobble.

A fluid powered rotary actuator having a first member which is pivotally connected to a second member and which is includes at least one toroidal shaped spear or piston which acts within a correspondingly shaped toroidal shaped cylinder to move the first member relative to the second member. The or each toroidal shaped spear or piston and cylinder assembly includes seals mounted within a seal carrier and the configuration allows movement of the seals relative to the or each cylinder. This configuration allows the seals to continue to provide a leak resistant hydraulic seal between each toroidal shaped spear or piston and its associated cylinder even in cases where the toroidal shaped spears or pistons deflect relative to their associated cylinders. The cylinders are also mounted to the first or second members in a manner designed to reduce the chance of tensile cracking due to deflection of the cylinders.

A method for obtaining and applying a sealing gasket element on a slide-valve sliding in a cavity of an apparatus for the recirculation and mixing of chemically reactive polymeric components, comprises the steps of: obtaining from an elastic-plastic material a precursor element of the seal element, with a grid structure having a reticular shape; positioning the precursor element around the slide-valve; exerting on the precursor element, through temporary clamping elements, a radial compression and contraction action to insert it and couple it to one or more housing seats provided on the slide-valve so as to obtain the seal element well coupled to the latter; progressively removing the clamping elements to sequentially release successive parts of the gasket element and gradually free the slide-valve to gradually introduce the parts of the slide-valvefreed in successionin the housing cavity allowing the sealing gasket element to gradually expand radially due to the elastic return by adhering tightly to the inner surface of the same housing cavity. The special equipment for fitting the sealing gasket element on the slide-valve and the so obtained recirculation and mixing apparatus is also described.

An intershaft seal assembly that is between a first shaft and a second shaft of a bearing compartment of an engine includes a first seal element and a retaining element. The first seal element surrounds the first shaft and includes a first portion is in contact with the first shaft and a second portion extending in a non-parallel direction to a radial direction of the first shaft. The retaining element is threadably engaged with the first shaft such that the retaining element presses the first seal element against the shoulder of the first shaft.

A radial shaft seal includes a powder coating on a shaft and a sealing lip that lands on the powder coating. The powder coating is formed of a thermosetting resin and a filler material. The filler material has a melting point above the cure temperature of the thermosetting resin. The powder coating may be porous. The powder coating may be made up of dry powder particles adhered to one-another with spaces in between. The filler may be present in an amount between 15% and 35% within the individual particles. The powder coating is adapted to wear away at locations of maximum interference with the sealing lip while continuing to provide a durable seal. This wear behavior compensates for shaft wobble.

In one aspect, described is a rotor for a Wankel engine comprising two circumferentially spaced apart apex seals at each of the apex portions with each apex seal protruding axially from both end faces, and each apex seal having a first biasing member biasing the apex seal radially outwardly away from the peripheral face of the body, and a second biasing member biasing the apex seal axially outwardly away from a respective one of the end faces, the two apex seals of a same one of the apex portions being biased by the respective second biasing member in opposite axial directions from one another.

Embodiments of the present invention describe the arrangement of bearings in actuators. In particular, the bearings are fit into a surface of the actuation member instead of into the housing for the actuation member. In an exemplary embodiment of a rotary vane actuator, the bearings are fit into the axial surfaces of the vane actuation member instead of in the floor and rotor cap of the housing. In this way, the problem of an axial bearing working loose and grinding a leak path into the actuation member is addressed.

A fluid powered rotary actuator having a first member which is pivotally connected to a second member and which is includes at least one toroidal shaped spear or piston which acts within a correspondingly shaped toroidal shaped cylinder to move the first member relative to the second member. Each toroidal shaped spear or piston and cylinder assembly includes seals mounted within a seal carrier and the configuration allows movement of the seals relative to the or each cylinder. This configuration allows the seals to continue to provide a leak resistant hydraulic seal between each toroidal shaped spear or piston and its associated cylinder even in cases where the toroidal shaped spears or pistons deflect relative to their associated cylinders. The cylinders are also mounted to the first or second members in a manner designed to reduce the chance of tensile cracking due to deflection of the cylinders.

Provided is a rotary damper (1) suitable for use as a damper for a brake pedal with a fail-safe feature.

In the rotary damper (1) intended for a brake pedal of an automobile and configured to generate a damping torque by rotation of a casing (11) in a forward direction N relative a rotor (12), the casing (11) is made of thermoplastic resin and is provided with a pair of arms (19a, 19b) projecting radially outward so as to hold a plate (5) therebetween. The plate (5) is configured to rotate about a pedal rotation center in conjunction with the brake pedal (4). Moreover, the arm (19a) out of the arms (19a, 19b), which is located downstream in the forward direction, includes a curved portion (191) with a constant width and a supporting portion (192) located more distal than the curved portion (191) is, and is configured to support the plate (5) with the supporting portion (192).

Embodiments of the present invention describe the arrangement of bearings in actuators. In particular, the bearings are fit into a surface of the actuation member instead of into the housing for the actuation member. In an exemplary embodiment of a rotary vane actuator, the bearings are fit into the axial surfaces of the vane actuation member instead of in the floor and rotor cap of the housing. In this way, the problem of an axial bearing working loose and grinding a leak path into the actuation member is addressed.