초록 ▼

A plastic blower including a clam shell housing. The clam shell members of the housing are sealed together by means of a groove in the edge of one of the clam shell members and a tongue formed on the edge of the other clam shell member. A strip of flexible sealing material is disposed in the groove

A plastic blower including a clam shell housing. The clam shell members of the housing are sealed together by means of a groove in the edge of one of the clam shell members and a tongue formed on the edge of the other clam shell member. A strip of flexible sealing material is disposed in the groove and is compressed therein by engagement with the protruding tongue. The spaced between the tongue and the walls of the groove converges toward the open end of the groove, whereby an increase or decrease of pressure within the housing relative to the ambient pressure causes the sealing strip to be further wedged into the space, thereby increasing the effectiveness of the seal.

대표청구항 ▼

In a blower, a housing comprising first and second clam shell members, said clam shell members each having mating edge portions; sealing means for sealing said housing and including a groove in an edge portion of said first clam shell member, said groove having diverging walls, a tapered tongue on t

In a blower, a housing comprising first and second clam shell members, said clam shell members each having mating edge portions; sealing means for sealing said housing and including a groove in an edge portion of said first clam shell member, said groove having diverging walls, a tapered tongue on the edge portion of said second clam shell member, said torque adapted to be loosely received in said groove, the respective walls of said tongue and groove forming a plurality of cavities with side walls which diverge in a direction toward the apex of said groove, a flexible strip of sealing material disposed in said groove, said strip being in contact with and compressed by said tongue, whereby an increase or decrease of pressure in said housing causes said strip to be more tightly compressed in said cavities between the respective walls of said tongue and groove.