Patent ID: 9080709
Filing Date: 2015-07-14
Classification: F15B,F16L,Y10T

Abstract:
1. A water hammer arrester, said water hammer arrester configured for threading into a plumbing fixture, comprising: a cap assembly, the cap assembly comprising a cap having an open first end and a closed second end, the cap defining an air chamber therein, the cap having a lower exterior sidewall and a lower interior sidewall adjacent the open first end, said cap assembly made of a plastic selected from the group consisting of acetal homopolymers and polyamides; a piston assembly, the piston assembly comprising a piston, the piston having a head and a tail, piston having an exterior surface defining at least one circumvolving channel, configured for receiving therein at least one O-ring, the piston configured for sliding movement within the air chamber as pressure in the attached plumbing system changes, said piston assembly made of a plastic selected from the group consisting of acetal homopolymers and polyamides; and a base assembly, the base assembly comprising a base having a first open end and a second open end, said second open end comprising a threaded portion for threading into said plumbing fitting, the base defining an exterior chamber therein surrounded by an interior sidewall, extending through the base is a passageway for interconnecting the first open end with the second open end, said exterior chamber configured for receiving therein said cap assembly open first end, wherein said cap lower exterior sidewall can be fixed to said base assembly interior sidewall thereby encasing said piston assembly therein, said base assembly made of a plastic selected from the group consisting of acetal homopolymers and polyamides.