Filter cartridge security for locking between operating and non-operating positions

In a head device for a filter assembly the combination comprising:

• (a) a manifold member adapted to be fixedly mounted, said manifold member including fluid inlet and outlet conduits;
• (b) a pair of linearly extending rails connected to said manifold member for carrying a slide member thereon;
• (c) a push-pull slide member for carrying a filter cartridge, said slide member being supported on said rails, and movable linearly on said rails between a load/unload position and a running position;
• and
• (d) means defining fluid passages extending through said slide member for establishing fluid communication between the inlet and outlet conduits in said manifold member and inlet and outlet passages in a filter cartridge with which said slide member is adapted to be associated.

In a filter assembly the combination comprising:

• (a) a manifold member adapted to be fixedly mounted, said manifold member including inlet and outlet conduits and being adapted to be disposed in a fluid conduit;
• (b) means defining a first planar surface formed on said manifold member;
• (c) a filter cartridge supporting member operatively associated with said manifold member and linearly movable relative thereto between a load/unload position and a running position;
• (d) means defining fluid passages in said filter cartridge supporting member for establishing fluid communication between said inlet and outlet conduits in said manifold member and inlet and outlet conduits in a filter cartridge adapted to be supported in said filter cartridge supporting member;
• (e) means defining a second planar surface formed on said filter cartridge supporting member;
• and
• (f) face seal means secured on the first planar surface of said manifold member and engageable with said second planar surface on said filter cartridge supporting member.

A filter assembly comprising:

• a filter cartridge retaining head member with an inlet and outlet which is adapted to be disposed in a fluid conduit and adapted to have a filter cartridge inserted thereinto;
• a filter cartridge for insertion into said head member, said filter cartridge including a pressure vessel, a closure member secured in the open end of said pressure vessel and containing or adapted to contain a filter element and further including an inlet and outlet for communicating with said head member;
• a pair of radially extending bayonet lugs formed on the outer surface of said closure member for cooperating with said head member to retain said filter cartridge in said head member;
• and
• recess means formed on at least one of said bayonet lugs for accepting a movable pin means disposed in said head member to prevent rotation of the filter cartridge out of its operating position.

In a filter assembly the combination comprising:

• a filter cartridge for insertion into a filter cartridge retaining head member having an inlet and outlet and which is adapted to be disposed in a fluid conduit, said filter cartridge including a pressure vessel, a closure member secured in the open end of said pressure vessel and containing or adapted to contain a filter element and further including an inlet and outlet for communicating with the head member;
• a pair of radially extending bayonet lugs formed on the outer surface of said closure member for cooperating with the head member to retain said filter cartridge in the head member;
• and
• recess means formed on at least one of said bayonet lugs for accepting a movable pin means disposed in said head member to prevent rotation of the filter cartridge out of its operating position in the head member.

A filtering system comprising

• a plurality of filter assemblies, each of said filter assemblies including a manifold member, a filter cartridge supporting member associated with the manifold member and a filter cartridge inserted into said filter cartridge supporting member;
• each of said filter cartridge supporting members being adapted to selectively assume a load/unload position or a running position with respect to its associated manifold member,
• conduit means interconnecting the manifolds of said filter assemblies;
• automatic fluid shut-off means provided in each of said filter assemblies,
• said automatic fluid shut-off means comprising a pair of seal members disposed between the manifold member and the filter cartridge supporting member in each filter assembly, said seal members being effective to shut-off both influent and effluent in a particular filter assembly when the filter cartridge supporting member of said particular filter assembly is moved to a load/unload position.

A filter cartridge for insertion into a filter head member having a fluid inlet and outlet comprising:

• a pressure vessel adapted to contain a filter element therein;
• a closure member secured in the open end of said pressure vessel, said closure member including coaxially disposed first and second tubular portions radially spaced from each other to define an opening therebetween, said first tubular portion defining a fluid inlet opening therethrough to the pressure vessel, and said opening between said first and second tubular portions defining a fluid outlet opening from said pressure vessel;
• a pair of radially extending bayonet lugs formed on the outer surface of said closure member for cooperating with the head member and to retain the filter cartridge in the head member with which the filter cartridge is adapted to be associated;
• and
• recess means formed on at least one of said bayonet lugs for accepting a movable pin means disposed in the head member to prevent rotation of the filter cartridge out of its operating position.