Fluid handling – Self-proportioning or correlating systems – Supply and exhaust type
Patent
1987-02-09
1988-11-08
Schwadron, Martin P.
Fluid handling
Self-proportioning or correlating systems
Supply and exhaust type
137114, 13762418, A61M 100, F17D 300
Patent
active
047828498
ABSTRACT:
An intermittent suction regulator is disclosed operating from a vacuum system and is used to provide a plurality of pneumatic output signals to a positive pulse device for returning fluids removed from a patient during drainage thereof to clear the removal passageways. The suction regulator or control unit provides two (2) timed output signals, from one (1) intermittent vacuum to atmospheric pressure input. One output signal continually switches from a regulated vacuum signal to an atmospheric pressure signal while the other output signal switches from providing an unregulated vacuum signal to an atmospheric pressure signal. The signals are timed such that both are initially set to provide vacuum signals simultaneously, however there is a predetermined time delay between the time the regulated vacuum output signal switches from vacuum to atmospheric and when the unregulated vacuum output signal switches from vacuum to atmospheric. Both output signals, however, again switch back to their vacuum signals simultaneously after a predetermined cycle time.
REFERENCES:
patent: 2652847 (1953-09-01), Segebarth
patent: 3183920 (1965-05-01), Cochran
patent: 3255776 (1966-06-01), Noorlander
patent: 3499465 (1970-03-01), Roop
patent: 3659605 (1972-05-01), Sielaff
patent: 4315506 (1982-02-01), Kayser et al.
patent: 4391294 (1983-07-01), Aubel
Cassett Larry R.
Hepperle Stephen M.
Rathbun Roger M.
Schwadron Martin P.
The BOC Group Inc.
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