Nozzle with improved coupling for a vacuum device

Details Nozzle with improved coupling for a vacuum device Nozzle with improved coupling for a vacuum device

1987-05-29

1988-05-31

Moore, Chris K.

Brushing, scrubbing, and general cleaning

Machines

With air blast or suction

285 7, 285371, A47L 902

Patent

active

047471794

ABSTRACT:
For attaching a rigid coupling to a nozzle for relative rotational freedom between them and for reducing the noise level at the connection between them, the coupling has a generally cylindrical arm to be received in a cylindrical opening into the nozzle. The arm of the coupling has a nonmetallic, plastic sleeve placed thereover, which is preferably in the form of two half cylinders. Grooves in the nonmetallic sleeve reduce the area of frictional contact between the sleeve and the nozzle. The nonmetallic sleeve has tabs at one end for passing through a gap in a ring in the nozzle to connect the coupling and the nozzle, while permitting relative rotation.

REFERENCES:
patent: 2318317 (1943-05-01), Lofgren
patent: 2659616 (1953-11-01), Doyle
patent: 3069186 (1962-12-01), Stevens
patent: 3159412 (1964-12-01), Descarries
patent: 3286295 (1966-11-01), Fromknecht
patent: 3750222 (1973-08-01), Johnson
patent: 4309048 (1982-01-01), Ahlf et al.
patent: 4519638 (1985-05-01), Vodoshi et al.

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