Abstract: A sealing assembly for a rotary drive shaft that extends through the hull of a boat, the outboard end of the shaft being coupled to a propeller and the inboard end to a marine engine for rotating the propeller. The assembly includes a cylindrical housing joined by a flexible hose to a tube in the stern of the boat through which the shaft passes. Received within the housing is an annular bearing whose bore diameter depends on the size of the shaft whereby the bearing installed in the housing has an internal diameter appropriate to the size of the shaft being sealed by the assembly. Coupled to one end of the housing is an annular cap having an elastomeric lip seal therein that frictionally engages the shaft to prevent sea water from leaking into the boat. A reservoir defined by an annular space within the housing between the lip seal and the bearing is continuously fed with water to cool and lubricate the lip seal.

Abstract: Handling ability can be improved and operational defect at a time of integral formation with a rubber like elastic seal lip can be prevented by effecting a chamfering working to an edge portion of a conical washer like resin ring. In a method in which a conical washer like resin ring 40 is formed by conically cutting away an end surface 51 of a cylindrically formed resin material 50 with a predetermined thickness and the resin ring is utilized as a seal lip 3 by assembling the inner diameter end portion or outer diameter end portion with a device body, it is characterized in that a sharply projecting edge portion 47 on the side utilizing as the seal lip of the conical washer like resin ring 40 is subjected to chamfering working 45, 46. It is characterized in that the resin ring 40 is assembled with the device body having a rubber like elastic seal lip 2.

Abstract: A hydrodynamically lubricated squeeze packing type rotary shaft seal suitable for lubricant retention and environmental exclusion which incorporates one or more resilient protuberances which and cooperate with the gland walls to hold the seal straight in its installation groove in unpressurized and low pressure lubricant retention applications thereby preventing skew-induced wear caused by impingement of abrasive contaminants present in the environment, and which also serve as radial bearings to prevent tipping of the seal within its installation gland.

Abstract: An outboard seal between a rack bar of a rack and pinion steering gear and a fluid motor cylinder tube around the rack bar. The outboard seal includes an annular bulkhead in an outboard end of the cylinder tube around the rack bar, a metal retaining ring preventing dislodgment of the bulkhead from the cylinder tube by fluid pressure in the cylinder tube, and a seal ring adjacent an end wall of the bulkhead having an outer surface resiliently pressing against the cylinder tube and an inner lip biased against the rack bar by garter spring. A coupling between the seal ring and the bulkhead consists of an annular groove in a cylindrical shoulder on the bulkhead and a flexible lip on the seal ring stretched over the cylindrical shoulder and seated loosely in the annular groove.

Abstract: A sealing device for a drive line slip yoke includes a generally resilient seal and a substantially rigid cover that cooperate to provide a fluid-tight seal at the interface between a slip yoke and an axially moving splined shaft. The seal has a mounting portion that includes a shoulder received within a groove defined on an outer surface of the slip yoke. The cover is snapped over the seal and maintained in position by cooperating tabs on the cover and a groove defined on an outer surface of the seal. The seal includes a sealing portion having three axially spaced and radially inwardly extending lips. A middle lip acts as an O-ring that serves as a back-up in the event that one of the other two lips becomes damaged or deteriorates with use. The substantially rigid cover serves to maintain the seal in proper engagement with the end of the slip yoke and protects the seal from damage potentially caused by debris encountered during operation.

Abstract: An integrated sealing system for automatic transmission made up of a sole part composed essentially of annular structural metal element (10), suitable for assembling in the annular space between the main shaft (1) and semi-shaft of the wheel set (2) and casing (3) of the automatic transmission; and a set of rubber sealing elements to seal all the interstices in that area of the automotive vehicle mechanism, incorporated in the annular structural element (10) formed by radial sealing element (dynamic sealing) (11)-(12); and surface sealing (static sealing); the radial sealing element (11)-(12) consists on the whole of: a first element (11) composed of a rim (20) which seals against the main shaft (1) with a garter type spring (21) to absorb radial efforts; flanges (22) to protect the spring from being released; in addition, the radial sealing element (11)-(12) has a second element (12) consisting of: a rim (25) which seals against the wheel set semi-shaft (2), and a rim (26) that seals against the deflector (2

Abstract: When the annular seal 11 which provides sealing around a shaft 1 is damaged, something which is signalled by an oil leak, the axially mobile seal carrier 10 is pushed to the left, with the aid of the lug 13, to bring an additional seal 12 into service, this making it possible to eliminate the leak without any dismantling. This operation can be brought about by a jack and can be automated.Application to all rotating shafts.

Abstract: An annular oil lip seal extender is used to axially reposition a conventional lip seal with respect to a rotating shaft after a wear groove is formed by the rubbing interaction between the lip seal and shaft without the need for a new seal, a new or reground shaft, the use of unreliable thin walled sleeves that fit over the shaft, or overly complicated assemblies that are prone to failure. The extender can be press fitted into the seal and the sub-assembly installed into a conventional housing bore. Alternatively, the extender can be loose fitted into the housing bore and the seal press fitted between the extender and the circumferential extending wall of the housing bore.

Abstract: A multibarrier seal having outer and inner cases fitted to the outer and inner races of a bearing respectively. The outer case carries a primary lip which bears against an axial wall on the inner case. The inner case carries a secondary lip which bears against an axial wall on the outer case. The outer case also carries a tertiary lip which bears against a radial sealing surface which may be on a carrier fitted to the inner case. All three lips are inclined with respect to the surfaces against which they bear, and have back faces which are presented away from the interior of the bearing. Initially atmospheric air bears against the back face of the primary lip and urges it with greater force against the axial wall of the inner case to hold a vacuum within the interior of the bearing. Should the primary lip fail, the secondary lip will serve to hold the vacuum in the same way, with atmospheric air urging it with greater force against the axial wall of the outer case.