Pipe joints or couplings – Vacuum cleaner type
Patent
1986-12-15
1988-11-08
Arola, Dave W.
Pipe joints or couplings
Vacuum cleaner type
285 93, 285179, 285383, 285417, 285915, 285369, F16L 5500
Patent
active
047830999
ABSTRACT:
A conduit system for the flow of a fluid medium therethrough wherein the system is made up of a plurality of elongated conduit segments connected by means of fittings, such as straight connectors, elbows, T's or the like. The conduit segments are composed of opaque material and the fittings are composed of transparent material.
REFERENCES:
patent: 873300 (1907-12-01), Cranston
patent: 1644553 (1927-10-01), Trout
patent: 2272811 (1942-02-01), Nathan
patent: 2786696 (1957-03-01), Feldmeier
patent: 3481633 (1969-12-01), Schonholzer
patent: 3568240 (1971-03-01), Hamrick
patent: 3594021 (1971-07-01), Williams
patent: 3682500 (1972-08-01), Hamrick
patent: 3908208 (1975-09-01), McIlny
Patent Abstracts of Japan vol. 2, No. 63(M-78).
Arola Dave W.
Beck Peter L.
Gerken Karen M.
Smart Russel S.
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