A cylindrical shaft seal packaging sleeve that is inserted in a shaft seal an inner peripheral surface of which slidably contacts with a rotation shaft includes an insertion end portion that is inserted in the shaft seal and a mounting end portion having a larger outer diameter than that of the insertion end portion, a chamfered portion is formed in each of the insertion end portion and the mounting end portion and a step portion having a larger outer diameter than that of the chamfered portion is provided in an axial deeper side than the chamfered portion, and a minimum diameter of the step portion in the insertion end portion is smaller than a minimum diameter of the shaft seal.

A shaft seal assembly for establishing a liquid-tight seal between a steering knuckle and an axle shaft is provided. The shaft seal assembly includes an outer case and a first elastomeric member attached to one another. The elastomeric member has a castellated feature including a plurality of projections extending in a radially outward direction and separated from one another by a plurality of grooves. When the shaft seal assembly is installed in the steering knuckle, a cavity is presented between the steering knuckle and the first elastomeric member. Together, the grooves and cavity allow air to flow from a hub on one side of the seal assembly to a vacuum port in the steering knuckle. The cavity extends circumferentially around the seal assembly, and thus, air flow from the hub to the vacuum port is not dependent upon the orientation of the seal assembly relative to the steering knuckle.

A shaft seal assembly for establishing a liquid-tight seal between a steering knuckle and an axle shaft is provided. The shaft seal assembly includes an outer case and a first elastomeric member attached to one another. The elastomeric member has a castellated feature including a plurality of projections extending in a radially outward direction and separated from one another by a plurality of grooves. When the shaft seal assembly is installed in the steering knuckle, a cavity is presented between the steering knuckle and the first elastomeric member. Together, the grooves and cavity allow air to flow from a hub on one side of the seal assembly to a vacuum port in the steering knuckle. The cavity extends circumferentially around the seal assembly, and thus, air flow from the hub to the vacuum port is not dependent upon the orientation of the seal assembly relative to the steering knuckle.

A seal assembly includes an annular rigid support member having a centerline and including an axial portion coupleable with the outer member and a radial portion extending inwardly from the axial portion. The radial portion has an outer end formed with the axial portion and an inner end defining a central opening disposeable around the shaft and being formed asymmetrical about the centerline and/or having a varying radial distance from the centerline. An annular sealing member has an outer portion attached to the support member and an inner portion with a first end providing a sealing lip, the sealing lip sealingly engageable with a running surface about a shaft to define a sealing interface, and a second end attached to the inner end of the support member radial portion. As such, contact pressure of the sealing lip against the running surface varies about a circular perimeter of the sealing interface.

The present disclosure provides a shaft seal for a screw conveyor. The shaft seal includes a housing that includes an outboard frame plate and an inboard frame plate. The shaft seal also includes an outboard compression plate and an inboard compression plate situated between the outboard frame plate and the inboard frame plate. A least three sealing devices are situated between the outboard compression plate and the inboard compression plate with an annular recess at least partially formed along at least one of the inboard compression plate and the outboard compression plate.

A valve device includes: a housing; a valve element; a rotatable shaft that rotates the valve element; a seal member that is slidably in close contact with an outer peripheral surface of the rotatable shaft to limit penetration of gas through a gap between the rotatable shaft and the housing; and a mounting ring that is shaped in a ring form and mounts the seal member to the housing. The mounting ring has: a ring portion, a one-side plate portion and an opposite-side plate portion which are formed from a single continuous plate material. The one-side plate portion and the opposite-side plate portion clamp the seal member therebetween and are joined together through the ring portion.

A sealing assembly having a seal casing. A decreased diameter portion extends inboard from at least a portion of a first end portion of the substantially cylindrical portion and an axially extending portion extends inboard from at least a portion of a second end portion of the decreased diameter portion of the casing. One or more first sealing portions having one or more static sealing ribs extend from at least a portion of an outer surface of the substantially cylindrical portion. One or more second sealing portions are integrally connected to at least a portion of the decreased diameter portion, the axially extending portion and/or an inner surface of the substantially cylindrical portion. The one or more second sealing portions have a retaining member sealing surface with one or more sealing member retention ribs extending from at least a portion of an outer surface of the retaining member sealing surface.

A sealing assembly having a seal casing. A decreased diameter portion extends inboard from at least a portion of a first end portion of the substantially cylindrical portion and an axially extending portion extends inboard from at least a portion of a second end portion of the decreased diameter portion of the casing. One or more first sealing portions having one or more static sealing ribs extend from at least a portion of an outer surface of the substantially cylindrical portion. One or more second sealing portions are integrally connected to at least a portion of the decreased diameter portion, the axially extending portion and/or an inner surface of the substantially cylindrical portion. The one or more second sealing portions have a retaining member sealing surface with one or more sealing member retention ribs extending from at least a portion of an outer surface of the retaining member sealing surface.

[Problem] To provide a sealing device having high pressure resistance and durability for a reciprocating shaft. [Solution] A sealing device comprising an oil seal member and a dust seal member. The oil seal member and the dust seal member each comprise a rigid ring provided inside a shaft hole and an elastic ring attached to the rigid ring, wherein the elastic ring has formed thereon a lip that slidably contacts a reciprocating shaft. The rigid ring of the dust seal member is detachably fitted in the rigid ring of the oil seal member. The sealing device further comprises another rigid ring provided between the elastic ring of the oil seal member and the elastic ring of the dust seal member in a direction parallel to the axial direction of the reciprocating shaft. This rigid ring is detachably fitted in a concave portion formed radially inward of the rigid ring of the dust seal member and reinforces the elastic ring of the dust seal member.

A sealing structure for a front cover of an engine includes a front cover made of resin of an engine in which a through-hole, into which a boss part of a torsional damper is to be inserted, is provided, and a sealing apparatus to seal between the through-hole of the front cover and the shaft part. The sealing apparatus includes a support ring that is made of resin and has an annular shape, and an elastic body part that is made of an elastic material, has an annular shape and is attached to the support ring. The elastic body part has an annular seal lip that contacts the shaft part such that the shaft part is able to slide, and the support ring is bonded to the front cover.