Surgery – Means for introducing or removing material from body for... – Treating material introduced into or removed from body...
Patent
1991-03-07
1995-05-30
Burr, Edgar S.
Surgery
Means for introducing or removing material from body for...
Treating material introduced into or removed from body...
12820519, 12820524, A61M 100
Patent
active
054197686
ABSTRACT:
A medical vacuum regulator (10) with a solenoid regulating valve (20) and a comparator (22) for electrically, automatically controlling the solenoid regulating valve (20) to intermittently open and close to achieve a preselected regulated vacuum (v) which is continuously provided or in intermittent mode decreases during a relaxation period (35) to atmosphere (30) and automatically increases during a ramp period (29) of a vacuum cycle (21) to prevent vacuum surge trauma to a patient (14). The regulating valve (20), in addition to regulating the vacuum during the vacuum cycle (21), continuously vents the system to atmosphere (30) when a patient venting solenoid valve (48) vents the patient (14) to atmosphere (30) to reduce the load on a vacuum pump (12). The continuous and intermittent modes of operation are selected by a mode selection circuit (36) with means for maintaining it in its selected state during a period of temporary power loss.
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Aeros Instruments, Inc.
Burr Edgar S.
Lewis Aaron J.
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