A seal structure between an oil outlet formed in a first case and an oil inlet formed in a second case and having an end face facing an end face of the oil outlet with a clearance between the end faces, the seal structure including an annular first seal disposed in an increased-diameter hole, which is formed on an outlet side or an inlet side of an oil passage in one of the oil outlet and the oil inlet and has a larger diameter than the oil passage, such that the first seal contacts a step surface located at a boundary between the oil passage and the increased-diameter hole; and an annular second seal harder than the first seal and disposed in the increased-diameter hole such that the second seal contacts the first seal and the end face of the other of the oil outlet and the oil inlet.

A sealing system which is designed to leverage the centrifugal acceleration of solids and liquids due to the natural rotation of the roller, expelling them outside, preventing most of the contamination from trying to penetrate the roller seals. Excess of contaminants that is not centrifugally expelled is blocked by the following internal sealing system.

There is provided a cryocooler including a displacer, a displacer drive mechanism, a connecting rod that connects the displacer drive mechanism to the displacer, and a sealing component that supports the connecting rod to allow axial reciprocation thereof. The sealing component includes a bush through which the connecting rod is inserted and defining a radial clearance functioning as a non-contact seal between the connecting rod and the bush, a first contact seal held by the bush on a first side thereof toward the displacer drive mechanism with respect to the radial clearance, and sealing the radial clearance, and a second contact seal held by the bush on a second side thereof toward the displacer with respect to the radial clearance, and sealing the radial clearance.

An inflatable seal includes an annular body made of elastic material. The inflatable seal includes a chamber disposed in the annular body. The inflatable seal includes a fixing end and a movable end opposite to the fixing end in a cross section. The inflatable seal further includes first and second sides interconnected between the fixing end and the movable end and opposite to each other. The fixing end includes an annular lining disposed in the annular body. The sealing ability of the inflatable seal is improved in the axial direction and the radial direction.

A mechanical seal assembly adapted for arrangement around a rotating shaft of a pump has first and second seals. Both include primary and mating rings, biasing mechanisms and annular flexible sealing membranes. The two seals can have different seal balances or different biasing forces (or both) to allow the second seal to run dry for extended periods.

A standstill seal prevents leakage of a process fluid when a shaft is not rotating. The seal includes a flexible band surrounding the shaft that includes a thick, substantially rectangular center region from which thinner side regions extend. Application of pressurized control fluid to a rear surface of the band causes the central region to extend through a gap between cover plates to form a seal with the shaft or an intermediate structure. Depressurizing of the control fluid causes the central region to be withdrawn from the shaft, either entirely due to elasticity of the band, or with the assistance of springs. In various embodiments, the seal is formed radially inward or axially. The side regions can be substantially flat or curved. The standstill seal can be unitary with a rotating shaft seal, and can be upstream or downstream thereof. The control fluid can be the process fluid.

A toilet seal for sealing between a plumbing fixture discharge and a waste drainpipe outlet is described. The toilet seal comprises a flange member having an inwardly extending flexible lip. A flexible sleeve extends downwardly from the flange member. The toilet seal further includes a compressible member having an upper surface disposed adjacent to a lower surface of the flange member. The compressible member further has a lower surface and a plurality of ridges extend downwardly from the lower surface of the compressible member.

A toilet seal for sealing between a plumbing fixture discharge and a waste drainpipe outlet is described. The toilet seal comprises a flange member having an inwardly extending flexible lip. A flexible sleeve extends downwardly from the flange member. The toilet seal further includes a compressible member having an upper surface disposed adjacent to a lower surface of the flange member. The compressible member further has a lower surface and a plurality of ridges extend downwardly from the lower surface of the compressible member.

The rotary face seal with magnet loading replaces known spring mechanisms with magnetic technology that provides a consistent load with minimal variation, which is not affected by natural frequency and material fatigue due to cyclic loading. This improves seal performance and service life. The tubular magnetic ring is advantageous because it replaces existing seals within stationary cartridge with a puller type magnetic assembly design that results with the stationary cartridges being an exact exchange. The use of magnetic technology attached to the outside diameter of the rotating mating ring, which is attached to the shaft, that does not produce eddy currents because it is of a single pole configuration. The single pole magnetic assembly design is achieved by either axial or radial magnet orientation, such as in the form of a tubular magnetic band locating in a circumferential notch in the rotating mating ring.

A pivot joint comprises a pivot pin mounted to a first member and a second member with a housing defining a bore receiving the pivot pin, thus forming a pivot axis for pivotal movement of one member relative to the other. A resilient toroidal gasket is provided at either end of the housing in the bore at axially spaced positions of the pivot pin, and a circumferential recess receives each gasket in fixed axial location along the pivot pin. The gasket spans radially of the pivot pin from a base of the recess and across a circumferential gap formed between an inner surface of the bore and an outer surface of the pin where lubricant is suitably received. Thus the gaskets form a sealed interior of the bore closed at either end by the respective gasket so as to maintain the lubricant therein and contaminants out.