F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
F16K 15/00 (2006.01) F16K 17/00 (2006.01) F16K 27/00 (2006.01) F17D 3/01 (2006.01) F16K 29/00 (2006.01)
Patent
CA 2565555
A backflow prevention device includes a main body holding a removable cartridge. The removable cartridge houses two independently acting check valves and, optionally, a relief valve. A first portion of the cartridge may be retracted into a second portion of the cartridge, thereby reducing the overall length of the cartridge and facilitating the removal of the cartridge from the main body without the need to remove the backflow prevention device from a water supply system. The relief valve is contained in a removable cartridge. Each check valve may have a self cleaning plunger bore comprising at least one spiral groove.
Clayton Gary A.
Olivas Victor S.
Macrae & Co.
Rain Bird Corporation
LandOfFree
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