Coupler with check valve for a dental ejector hose

Details Coupler with check valve for a dental ejector hose Coupler with check valve for a dental ejector hose

1996-03-18

1998-03-10

Lewis, Ralph

Dentistry

Apparatus

Having suction orifice

604247, 604902, A61C 1714

Patent

active

057253749

ABSTRACT:
A coupler is adapted for inserted engagement with a dental ejector valve and serves to couple a vacuum hose to the valve. A passageway in the coupler is closed by a flexible disk which flexes open in response to a vacuum inducted ejector system flow from a source. The disk is confined in place across the passageway by a retainer which biases the disk into engagement with a valve seat surface. The flexible disk blocks any reverse flow through the coupler as when a reduced pressure occurs from interaction of the patient's mouth with a saliva ejector.

REFERENCES:
patent: 2867213 (1959-01-01), Thomas, Jr.
patent: 4222407 (1980-09-01), Ruschke et al.
patent: 4556086 (1985-12-01), Raines
patent: 4859182 (1989-08-01), Nerli
patent: 4966551 (1990-10-01), Betush
patent: 4998880 (1991-03-01), Nerli
patent: 5203769 (1993-04-01), Clement et al.
patent: 5401255 (1995-03-01), Sutherland et al.
patent: 5464397 (1995-11-01), Powers, Jr.
patent: 5480124 (1996-01-01), Bartlett et al.

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