Replaceable filter cartridge and head assembly with safety shut-off valve
First Claim
1. A filter assembly adapted for connection between fluid supply and delivery lines to filter fluid flowing therethrough, comprising, in combination,a replaceable filter cartridge enclosing a filter medium and having at one end concentric entrance and exit passages confined within an axially outwardly projecting annular wall,a mounting head having inlet and outlet ports adapted for substantially fixed connection to said supply and delivery lines, respectively, said mounting head having a cylindrical recess for sealingly receiving said annular wall of said filter cartridge therein,said filter cartridge and said mounting head each having complementary interfitting means thereon for permitting quick locked connection and unlocked disconnection of said filter cartridge to and from said mounting head incident to axial rotation of said filter cartridge in opposite directions, respectively, relative to said mounting head,inlet passage means in said mounting head for communicating between said inlet port and said cylindrical recess,valve means disposed in said inlet passage means, said valve means being biased to a normally closed position,and valve operating means on said one end of said filter cartridge for opening said valve means incident to axial rotation of said filter cartridge into fully locked connection with said mounting head.
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Accused Products
Abstract
A filter assembly adapted for connection between fluid supply and delivery lines to filter fluid flowing therethrough includes a replaceable filter cartridge having at one end concentric entrance and exit passages confined within an axially outwardly projecting annular wall and a mounting head having inlet and outlet ports adapted for substantially fixed connection to the supply and delivery lines, respectively. The mounting head has a cylindrical recess for sealingly receiving the annular wall of the filter cartridge therein, and the filter cartridge and the mounting head each have complementary interfitting ears and lugs thereon for permitting quick locked connection and unlocked disconnection of the filter cartridge to and from the mounting head incident to axial rotation of the filter cartridge in opposite directions, respectively, relative to the mounting head. A normally closed safety shut-off valve is disposed in the inlet passage of the mounting head and a valve operating cam on one end of the filter cartridge is provided for opening the valve incident to axial rotation of the filter cartridge into fully locked connection with the mounting head.
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Citations
25 Claims
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1. A filter assembly adapted for connection between fluid supply and delivery lines to filter fluid flowing therethrough, comprising, in combination,
a replaceable filter cartridge enclosing a filter medium and having at one end concentric entrance and exit passages confined within an axially outwardly projecting annular wall, a mounting head having inlet and outlet ports adapted for substantially fixed connection to said supply and delivery lines, respectively, said mounting head having a cylindrical recess for sealingly receiving said annular wall of said filter cartridge therein, said filter cartridge and said mounting head each having complementary interfitting means thereon for permitting quick locked connection and unlocked disconnection of said filter cartridge to and from said mounting head incident to axial rotation of said filter cartridge in opposite directions, respectively, relative to said mounting head, inlet passage means in said mounting head for communicating between said inlet port and said cylindrical recess, valve means disposed in said inlet passage means, said valve means being biased to a normally closed position, and valve operating means on said one end of said filter cartridge for opening said valve means incident to axial rotation of said filter cartridge into fully locked connection with said mounting head.
Specification