Fluid handling – Line condition change responsive valves – With separate connected fluid reactor surface
Patent
1988-08-29
1989-05-16
Hepperle, Stephen
Fluid handling
Line condition change responsive valves
With separate connected fluid reactor surface
13762411, 137907, F16K 2116
Patent
active
048300470
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:
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patent: 3990516 (1976-11-01), Christensen et al.
patent: 3995607 (1976-12-01), Ludwig et al.
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patent: 4267809 (1981-05-01), Mase et al.
patent: 4303095 (1981-12-01), Aubel et al.
patent: 4651766 (1987-03-01), Ransom
Cassett Larry R.
Hepperle Stephen
Rathbun Roger M.
The BOC Group Inc.
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