Abstract: Occurrence of leakage of refrigerant around a seal member in cryogenic state is suppressed. The seal member 32 is formed from unsaturated polyester-PTFE with an unsaturated polyester mixing ratio of 20% to 35%. A plurality of slits 36 extended axially and penetrating through radially are provided in an end portion 35 of an outer circumferential wall 32a. Thus, by a synergistic effect of the use of a material small in the heat shrinkage factor and the reduction of radial shrinkage of the whole outer circumferential wall 32a attributable to the aforementioned configuration, the sealing properties in the cryogenic state are enhanced so that the occurrence of leakage of refrigerant is suppressed to the utmost, thereby preventing deterioration in the refrigeratability.

Abstract: Disclosed is an improved sealing element for a regenerative heat exchanging apparatus, such as a Ljungstrom.TM.-type or a Rothemuhle.TM.-type Preheater. The sealing element is mounted to a radial wall to provide a secure seal between the radial wall and an outer housing of the heat exchanging apparatus and prevent leakage between the hot gas conduit and cool air conduit. In a preferred embodiment, the sealing element includes a reinforced mounting strip that is used to mount the sealing element to the radial wall. The sealing element also includes a sealing strip that maintains a sealing contact between the radial wall and outer housing. A set of bellows is positioned on the sealing element to provide the sealing element with flexibility and resiliency so that the sealing element maintains contact with the sealing surface even when the heat exchanging apparatus experiences warping from thermal distortion.

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