Nova Patents
US3676986A

Built-in central vacuuming device

Abstract

An improved vacuum cleaner device utilizing a housing with portions which are rapidly assembled by interlocking together under compression, to simultaneously seat and mount the motor and impellers as well as the stators within the assembled housings. The device utilizes a flexible motor-mounting element and compressible O-rings, one of which is positioned between the two telescoping housings to provide an air seal as well as axial resilience helping to retain the parts in their assembled state. A similarly interlocking cylindrical extension is provided for use in enlarging the housing to accommodate a larger motor. A wall-mounted receptacle for access to the vacuum from the interior of the habitation has a front cover plate attached to the receptacle by a living hinge, and the entire receptacle can be molded in one piece, so as to bias the cover plate in its fully opened position by the molding orientation of the living hinge.

US3676986A, drawing sheet 1
Sheet 1 of 2

Term

Term ended

Expired 18 July 1989, 37.2 years ago.

  1. Priority and filed
  2. Granted
  3. Expired
  4. Today

2 sheets

  1. Sheet 1
  2. Sheet 2