Universal adapter sleeve for central vacuum cleaning systems

Details Universal adapter sleeve for central vacuum cleaning systems Universal adapter sleeve for central vacuum cleaning systems

1989-10-26

1991-03-05

Nicholson, Eric K.

Pipe joints or couplings

Vacuum cleaner type

15314, 285177, 285332, A47L 924

Patent

active

049972090

ABSTRACT:
A one-piece hollow sleeve molded of an elastomeric vinyl has a cylindrical rear end portion for attachment to a flexible hose of central vacuum cleaning system and has a front end portion which is slidably frictionally engageable within the inlet opening of variety of inlet valves. The front end portion is formed with a series of specifically sized and located tapered zones of varying lengths and angles of taper which enable the sleeve to be used with a variety of inlet valves having various internal diameters and lengths. A metal band is seated in a recess formed in the front end portion between certain of the tapered zones and has a length and location enabling it to contact the various pairs of contact buttons of the various types and styles of inlet valves. This universal sleeve eliminates a different hose attachment sleeve being required for each of the most common inlet valves of the most popular central vacuum cleaning systems.

REFERENCES:
patent: 2082054 (1937-06-01), Herzmark
patent: 2953806 (1960-09-01), Walker
patent: 3076068 (1963-01-01), Racklyeft
patent: 3110923 (1963-11-01), Berleme
patent: 3173164 (1965-03-01), Congdon
patent: 3258553 (1966-06-01), Breslin
patent: 3283093 (1966-11-01), Bishop
patent: 3565464 (1971-02-01), Wolf
patent: 3606403 (1971-09-01), Medney
patent: 4072330 (1978-02-01), Brysch

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