Telescopic tubular extension particularly for electric household

Details Telescopic tubular extension particularly for electric household Telescopic tubular extension particularly for electric household

1997-05-28

1999-12-28

Hook, James F.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

151444, 138114, 138120, 138177, 285298, 16115, 4031095, B60S 164

Patent

active

060063998

ABSTRACT:
A tubular extension, particularly for electric household appliances and cleaning machines in general, comprising at least two tubular elements telescopically associated with each other, a first one of these tubular elements being associated coaxially with a second one having a smaller cross-section and being slideable inside the first tubular element, one of these first and second tubular elements having at least one sliding portion whereat the outer or inner lateral surface is shaped so as to form at least one step, wherefrom the cross-section gradually increases radially and along a given peripheral arc, a longitudinal cavity being formed at the peripheral arc, and a tooth having a similar shape fitting snugly and reversibly in the cavity after sliding over a portion of the surface relative to the peripheral arc, the tooth being formed at the inner or outer surface of the other one of the first and second tubular elements on the side where mutual coupling occurs upon assembly. During the sliding of the first and second tubular elements with respect to each other, the tooth is adjacent to the corresponding step, which is thus adapted to form a stroke limiter.

REFERENCES:
patent: 321483 (1885-07-01), Burrows
patent: 1365851 (1921-01-01), Reynolds
patent: 4079965 (1978-03-01), Moughty et al.
patent: 4105346 (1978-08-01), Gelinas
patent: 4653142 (1987-03-01), Upton
patent: 4967484 (1990-11-01), Nosek
patent: 5336012 (1994-08-01), Newville
patent: 5417511 (1995-05-01), Warden

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