Abstract: A modular seal assembly for sealing a circular opening through a wall, usually with one or more conduits (i.e., telecommunication cables) extending through the seal. The assembly includes an outer pressure annulus and a thick inner pressure disc, both of natural or synthetic rubber, EPDM, urethane, or other elastomer. In the outer annulus the elastomer is an annular series of interconnected blocks of length L1 having a central opening of radius R2; a series of pressure bolts compress the blocks axially, expanding the annulus both outwardly and inwardly. The inner disc, which has an outer radius of about R2 and is interlocked with the elastomer blocks of the outer annulus, has a multiplicity of circular layers, much like an onion; the layers are concentric about an opening through which a conduit usually extends.

Abstract: A door check mechanism for regulating pivotal movement of a vehicle door between a closed position and one or more open positions, which mechanism is sometimes incorporated in a hinge, includes an elongated track member having a track surface with at least one detent receptacle in that track surface; a detent roller engages the track surface in rolling pressure contact at least part of the time whenever the door moves between its open and closed positions. Either the roller or the track has a resilient elastomer core, preferably an elastomer material (e.g., a silicone polymer) that retains its elastic properties over a temperature range that extends much higher than any temperature usually endurable by humans; the core is covered by a hard, relatively non-elastic but flexible sheath. The engaging portions of the roller and track surfaces are preferably dissimilar materials, usually a metal and a resin.