Water filter cartridge
First Claim
Patent Images
1. In a water filter cartridge, the combination comprising:
- a substantially cylindrical pressure vessel;
said pressure vessel having a substantially spherical first end and a generally planar second end;
said second end comprising an outlet and an inlet in fluid communication with said pressure vessel;
one of said outlet and said inlet being disposed coaxially with said pressure vessel;
the other of said outlet and said inlet being disposed adjacent thereto;
said outlet further comprising a first bail check valve adapted to block said outlet when said water filter cartridge is not in service;
said inlet further comprising a second ball check valve adapted to allow water to flow in the direction of said first end of said pressure vessel only;
said second end further comprises at least two asymmetrical lugs radially disposed about its periphery and adapted to mate with an apertured deck of a water treatment system to hold said water filter cartridge in place;
said outlet further comprises a generally cylindrical hollow nipple disposed coaxially to said outlet, a major portion thereof extending from said second end and a minor portion thereof extending toward said first end; and
said hollow nipple further comprises an open terminus defining a restricted opening.
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Accused Products
Abstract
A self-contained, disposable water filter cartridge for a water treatment system for treatment of potable water has one-way ball check valves at the water inlet and water outlet to the cartridge. The generally cylindrical water filter cartridge is generally spherical on one end while substantially planar on the other end and is of a welded plastic construction. Asymmetrical lugs radially disposed about the periphery of the planar end are adapted to mate with an apertured deck of a water treatment system.
78 Citations
19 Claims
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1. In a water filter cartridge, the combination comprising:
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a substantially cylindrical pressure vessel; said pressure vessel having a substantially spherical first end and a generally planar second end; said second end comprising an outlet and an inlet in fluid communication with said pressure vessel; one of said outlet and said inlet being disposed coaxially with said pressure vessel; the other of said outlet and said inlet being disposed adjacent thereto; said outlet further comprising a first bail check valve adapted to block said outlet when said water filter cartridge is not in service; said inlet further comprising a second ball check valve adapted to allow water to flow in the direction of said first end of said pressure vessel only; said second end further comprises at least two asymmetrical lugs radially disposed about its periphery and adapted to mate with an apertured deck of a water treatment system to hold said water filter cartridge in place; said outlet further comprises a generally cylindrical hollow nipple disposed coaxially to said outlet, a major portion thereof extending from said second end and a minor portion thereof extending toward said first end; and said hollow nipple further comprises an open terminus defining a restricted opening. - View Dependent Claims (2, 3, 4)
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5. In a water filter cartridge, the combination comprising:
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a substantially cylindrical pressure vessel; said pressure vessel having a substantially spherical first end and a generally planar second end; said second end comprising an outlet and an inlet in fluid communication with said pressure vessel; one of said outlet and said inlet being disposed coaxially with said pressure vessel; the other of said outlet and said inlet being disposed adjacent thereto; said outlet further comprising a first ball check valve adapted to block said outlet when said water filter cartridge is not in service; said inlet further comprising a second ball check valve adapted to allow water to flow in the direction of said first end of said pressure vessel only; said second end further comprises at least two asymmetrical lugs radially disposed about its periphery and adapted to mate with an apertured deck of a water treatment system to hold said water filter cartridge in place; said inlet further comprises a cup projecting inwardly in a proximate direction in relation to said second end; said cup having sectional inner walls in fluid communication with said inlet port and said pressure vessel shell; said cup having a major diameter, a beveled sealing surface located distally from said major diameter termination in a generally cylindrical port having a minor diameter; and said cup having disposed therein said second ball check valve in sealing contact with said beveled sealing surface. - View Dependent Claims (6)
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7. In a water filter cartridge, the combination comprising:
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a generally cylindrical pressure vessel; said pressure vessel comprising a pressure vessel shell and a pressure vessel base; said pressure vessel shell having an open first end and a generally spherical second end; said pressure vessel further comprising a generally circular and planar pressure vessel base; said pressure vessel base comprising a pressure vessel outlet disposed coaxially in relation to the circumference of said pressure vessel base extending therethrough in fluid communication with said pressure vessel shell; said pressure vessel base further comprising a pressure vessel inlet disposed adjacent said pressure vessel outlet and extending therethrough in fluid communication with said pressure vessel shell; said pressure vessel outlet comprising a generally cylindrical hollow nipple disposed coaxially to said outlet, a major portion thereof extending from said second end and a minor portion thereof extending toward said first end; said hollow nipple having an open terminus defining a restricted opening; said restricted opening having an inner surface defining an annular sealing wall; a first elastomeric spherical check valve disposed within said chamber in sealing relationship with said annular sealing wall; said hollow nipple further comprising a radial gasket lands disposed about the outer diameter thereof having an elastomeric gasket disposed thereon; said inlet comprising a cup projecting inwardly in a proximate direction in relation to said second end; said cup having sectional inner walls in fluid communication with said inlet port and said pressure vessel shell; said cup having a major diameter, a beveled sealing surface located distally from said major diameter terminating in a generally cylindrical port having a minor diameter; said cup having disposed therein a second elastomeric spherical check valve in sealing relationship to said beveled sealing surface; and said pressure vessel base further comprising at least two asymmetrical lugs radially disposed about its periphery and adapted to mate with a pair of corresponding hooks on a deck of a water treatment system to hold said water filter cartridge in place. - View Dependent Claims (8, 9)
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10. In a water filter cartridge, the combination comprising:
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a substantially cylindrical pressure vessel;
said pressure vessel having a substantially spherical first end and a generally planar second end;said second end comprising an outlet and an inlet in fluid communication with said pressure vessel; said outlet further comprising a normally closed first ball check valve; said inlet further comprising a normally closed second ball check valve adapted to open upon the application of water pressure to said inlet; and means for engaging and opening said normally closed first ball check valve system when said water filter cartridge is mounted in a water treatment system. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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19. A self-containing disposable filter cartridge comprising:
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a substantially cylindrical pressure vessel; said pressure vessel having a substantially spherical first end and a generally planar second end; said second end comprising a normally closed inlet ball check valve and a normally closed outlet ball check valve; and wherein said normally closed inlet ball check valve opens upon application of water pressure and said normally closed outlet ball check valve opens upon engagement with a pin disposed on a water treatment system which receives said filter cartridge.
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Specification