05947700 is referenced by 54 patents and cites 12 patents.

A safety device for use in a fluid transfer system for a swimming pool or similiar application, having a pump which draws water from a reservoir through one or more intake lines each extending from an open end at the reservoir to the pump intake. The device analyzes negative pressure levels in the system and, upon detecting a negative pressure level being outside of a selected operational range, the device deactivates the pump and triggers a vacuum breaker device to eliminate negative pressure in the system, by introducing air from atmosphere into the intake lines thereby removing suction at the open ends of the intake lines. The safety device may further activate warning devices including audible and visible alarms to indicate that the system has been deactivated.

Title
Fluid vacuum safety device for fluid transfer systems in swimming pools
Application Number
8/901849
Publication Number
5947700
Application Date
July 28, 1997
Publication Date
September 7, 1999
Inventor
Mark Fritze
558 Lakeside Cir., Sunrise, 33326
FL, US
David Rizzi
3613 Loquat Ave., Miami, 33133
FL, US
Paul C McKain
3300 NW. 97th Ave., Sunrise, 33351
FL, US
Agent
Robert M Downey P A
IPC
F04B 49/10
F04B 49/02
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