Suction fitting with pump control device

F - Mech Eng,Light,Heat,Weapons – 04 – C

Patent

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F04C 29/08 (1990.01)

Patent

CA 2082618

-15- SUCTION FITTING WITH PUMP CONTROL DEVICE ABSTRACT OF THE DISCLOSURE A suction fitting for use in a water circula- tion system, the fitting having a perforated body that is mounted to permit fluid flow through both front and rear perforated faces, and thereby minimize the possi- bility of complete blockage of the fitting by entrapped hair or skin. Operation of a circulating pump is con- trolled to prevent damage to equipment and property and also to minimize the possibility of serious personal injury or death. The suction fitting further includes a suction tube for connection to the pump, for circula- ting water in the tub or spa back through jets in the tub or spa, and a pressure sensor line connecting the water in the tub or spa to a water level sensor. The front face of the perforated body has a number of grooves, to provide fluid communication between the pressure sensor line and the suction tube, through one or more front-face perforations. When flow into the suction fitting is blocked, a reduced pressure is sensed immediately behind the front face of the perfor- ated body, through the pressure sensor line and the grooves in the front face, and the pump is disabled to prevent damage or physical injury.

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