Dentistry – Apparatus – Having intra-oral dispensing means
Patent
1989-03-02
1990-12-04
Bryant, III, James E.
Dentistry
Apparatus
Having intra-oral dispensing means
138111, 138115, 2851371, A61C 1702
Patent
active
049750550
ABSTRACT:
An extruded conduit structure for conveying several different fluids is provided comprising a cluster of at least three tubes connected by webs extending between adjacent pairs, the tubes and webs being formed by simultaneous extrusion of a suitable plastic through a suitable die. The outer surface of each of the webs is convexly curved in an arc that is substantially tangential with the outer surfaces of the adjacent pair of tubes. The inner surface of each of the webs is flat relative to the outer surface and forms a cord of such arc whereby each of the webs will be of minimum thickness along each of its junctures with the adjacent webs. This construction substantially eliminates any concave surfaces on the exterior of the conduit within which foreign matter may collect and, because of the thinner wall sections at the juncture of the webs with the adjacent tubes, the webs can be easily stripped along the tubes to expose the tube ends for connection to the appartus, such as a dental handpiece to which they are to be connected.
REFERENCES:
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patent: 4176453 (1979-12-01), Abbott
patent: 4531913 (1985-07-01), Taguchi
patent: 4729409 (1988-03-01), Paul
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A-Dec, Inc.
Bryant III James E.
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