Sealing unit for a wheel hub group for vehicles that is provided with a roller bearing interposed between a rotary hub for a wheel of the vehicle, and a stationary pin of an upright of said vehicle, the sealing unit in turn comprising an annular pre-cavity arranged in an axially frontal position of the roller bearing, a dynamic portion in rotation about an axis when in use, and a static portion cooperating with the dynamic portion to protect the roller bearing from external contaminants, the dynamic portion having a centrifuging surface formed on a free end of the hub and the static portion in turn having a stationary screen that is fitted onto the support pin inside the pre-cavity and that has a centrifuging section facing the centrifuging surface to facilitate expulsion and drainage of contaminants out of the annular pre-cavity.

Sealing unit for a wheel hub group for vehicles that is provided with a roller bearing interposed between a rotary hub for a wheel of the vehicle, and a stationary pin of an upright of said vehicle, the sealing unit in turn comprising an annular pre-cavity arranged in an axially frontal position of the roller bearing, a dynamic portion in rotation about an axis when in use, and a static portion cooperating with the dynamic portion to protect the roller bearing from external contaminants, the dynamic portion having a centrifuging surface formed on a free end of the hub and the static portion in turn having a stationary screen that is fitted onto the support pin inside the pre-cavity and that has a centrifuging section facing the centrifuging surface to facilitate expulsion and drainage of contaminants out of the annular pre-cavity.

A seal assembly includes an outer annular case disposed within and coupled with a rotatable outer member to be angularly displace about a central axis. An annular flexible seal is disposed within and coupled with the case to angularly displace about the central axis when the outer member rotates about the axis. The flexible seal has elastomeric sealing lip(s) engageable with an outer circumferential surface of the shaft or of a sleeve disposed about the shaft. An annular inner rigid seal is disposed within the outer case and has an inner end coupled with the shaft or the sleeve, the flexible seal being radially displaceable with respect to the inner rigid seal. An outer annular rigid seal is disposed about the inner seal and has an inner end sealing against the inner rigid seal. A biasing member biases the outer rigid seal against the inner rigid seal.

A sealable joint including a first component, a second component, and a third component. The first component includes a stem having a bore therethrough for the passage of a fluid. The second component is disposed on the first component, and the third component includes a sealing surface and one or more radially inwardly projecting members. One of the second component and the first component, or a combination of the second component and the first component includes a first flange and a second flange that defines an annular recess therebetween. In a sealing configuration, the second component is received by the third component to form a sealed joint in which at least part of the first flange deforms against the sealing surface, the one or more radially inwardly projecting members are disposed in the annular recess between the first flange and the second flange.

The disclosure relates to a fluid valve including a lip seal having a sealing lip between a pressure inlet and a pressure outlet, wherein the position of the sealing lip can be varied to vary a passage cross section. The disclosure further relates to a pneumatic valve arrangement having a park release valve and the fluid valve. The disclosure further relates to a pneumatic braking system including the fluid valve or the pneumatic valve arrangement.

The disclosure relates to a fluid valve including a lip seal having a sealing lip between a pressure inlet and a pressure outlet, wherein the position of the sealing lip can be varied to vary a passage cross section. The disclosure further relates to a pneumatic valve arrangement having a park release valve and the fluid valve. The disclosure further relates to a pneumatic braking system including the fluid valve or the pneumatic valve arrangement.

When the compressed air is not applied, an inclined surface, which is positioned at an upstream side with respect to the supply direction of the compressed air, of the lip part is in contact with the inclined surface of the inner ring. When the compressed air is applied, a contact area between the inclined surface, which is positioned at the upstream side with respect to the supply direction of the compressed air, of the lip part and the inclined surface of the inner ring becomes smaller, as compared to when the compressed air is not applied.

A fitting provides a sealed connection in an optionally pressurized fluid conveying system. The fitting can include a face seal surface defining an annular groove having an outer wall that extends inward from the face seal surface, a floor and an inner ramp wall that extends away from the floor toward the face seal surface. The inner ramp wall can be disposed at an acute angle relative to the floor. In some applications, this angle can be about 64° to about 68°. An O-ring can be disposed in the annular groove and under tension due to being stretched over the inner ramp wall. The O-ring can exert a force radially inward toward the longitudinal axis along the inner ramp wall to thereby improve retention of the O-ring in the annular groove.

A fitting provides a sealed connection in an optionally pressurized fluid conveying system. The fitting can include a face seal surface defining an annular groove having an outer wall that extends inward from the face seal surface, a floor and an inner ramp wall that extends away from the floor toward the face seal surface. The inner ramp wall can be disposed at an acute angle relative to the floor. In some applications, this angle can be about 64° to about 68°. An O-ring can be disposed in the annular groove and under tension due to being stretched over the inner ramp wall. The O-ring can exert a force radially inward toward the longitudinal axis along the inner ramp wall to thereby improve retention of the O-ring in the annular groove.

A sealing device for a bearing unit, the device having a stationary part provided with: a first metal shield, an elastomer coating, co-molded on the first shield, at least one contacting lip, radially internal, belonging to the elastomer coating. The sealing device having a rotatable part provided with a second metal shield on which the contacting lip makes a sliding contact. The second metal shield is provided with a plurality of flow baffles positioned at least on an axially exposed surface of the shield, shaped as recesses realized through the axially exposed surface and distributed along a radially outer peripheral edge of the shield.