Other

Tst Water, Inc.

International Environmental Technologies, Inc.

Michael T Baird

John J Julos

Randy L Parmley

A filter cartridge with a longitudinal axis has mounting lugs engaging mating manifold flanges in an appliance to hold the cartridge in the appliance with fluid flowing through the cartridge at a line pressure of X psi while the lugs are designed for a greater, rated pressure Y. Each lug has a deformable portion and an aligned stop portion that are axially aligned. A distance d separates each stop portion from the axially aligned deformable portion. The deformable portion is below the stop portion and located to contact the manifold flange during use. The deformable portion permanently deforms above the rated pressure Y and below a qualification pressure Z that is at least twice the pressure X.

Overpressure leak detection lug

A water filter cartridge has a cap with radially oriented first and second (either inlet or outlet) flow channels on first and second generally cylindrical portions. First and second seals encircle the first flow channel on the first portion and third and fourth seals encircle the second flow channel on the second portion. The second and third seals form a void volume during use which may be accessed by a vent path to eliminate moisture or to test for or indicate leaks. The radial flow paths reduce axial, push out forces on the filter cartridge and allow smaller locking tabs to be used. The first seal forms a top void volume during use which may be accessed by a vent path to eliminate moisture or to test for or indicate leaks.

Water filter cartridge and mating parts

A water filter cartridge has an end cap with inlet and outlet nozzles extending from the end cap. A lateral support extends laterally from at least one of the nozzles. A projection extends from the lateral support toward a receiving manifold to cooperate with the manifold during use. The lateral support is offset from the end cap so the projection is vertically offset from an end of the cartridge and laterally offset from and supported from the nozzles.

Water filter cartridge with slanted nozzles

Method of leak testing the seals in a water filter cartridge

Water filter cartridge and manifold head seal

A water filter cartridge for refrigerators is configured to indicate leakage when a cartridge is installed in a manifold having a larger diameter, male inlet and a smaller diameter, coaxial, male outlet. The filter cap has a cylindrical recess that mates with an O-ring on the manifold inlet during use. A fluid passageway extends through the wall forming that recess and opens immediately adjacent that O-ring to carry any leaking water to the outside of the filter cap. The filter cap has a seal on a smaller diameter recess that mates with the sidewall of the male inlet at a distal end thereof. The smaller diameter recess may have slots that allow water to bypass seals on the male outlet member. Under normal water pressure the system will immediately visually exhibit a substantial leak if the filter cartridge is incorrectly coupled to the manifold.

Water filter cartridge with improved leak indicator

A water filter cartridge has an end cap with separate inlet and outlet nozzles connected to the end of a cylindrical tube that extends from the end cap. The nozzles are slanted and laterally offset from the cylindrical tube. A cam surface on the outer side of the nozzles actuates valves in a mating manifold. The passage in the nozzles is conical, expanding toward the nozzle end and opening onto a portion of the nozzle side to form a sharper tip. Expanding ice pushes itself out of the conical passage and facilitates ice removal. The narrow end of the conical passage facilitates breakage and removal of ice from the nozzle.

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Temecula, CA, United States of America

Michael T Baird