Unit and snap-action device therefor

摘要

PCT No. PCT/DE96/02208 Sec. 371 Date Jan. 26, 1998 Sec. 102(e) Date Jan. 26, 1998 PCT Filed Nov. 20, 1996 PCT Pub. No. WO97/45635 PCT Pub. Date Dec. 4, 1997A simplified, economical, noise-abating mode of securing a unit embodied for instance as a valve. For securing the unit, the unit has a housing with a first portion having a first encompassing outer face and at least one second portion having at least one second encompassing outer face, wherein a first sealing ring can be mounted on the first outer face, and the first portion and first sealing ring can be introduced into a recess of an installation wall. A second sealing ring can be mounted on the second outer face of the second portion, and the second portion and second sealing ring can likewise be introduced into the recess, so that the support of the unit in the recess is effected by means of the first and second sealing rings without the first and second outer faces of the unit resting on inner faces of the recess. The installation wall has a tubular protruberance, into which the recess extends and which is subdivided, for retaining the unit, into a plurality of bendable ring-snap elements, into which the second sealing ring can be snapped when the unit is introduced into the recess. The unit according to the invention and the snap device for the unit are intended in particular for valves for metered introduction of evaporated fuel into an intake conduit of the internal combustion engine.