US 5,842,346 AGranted

Absorbent cartridge for release mechanism powered by contact with fluid

OwnerCharles J. Hsuinventor

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Abstract

A water-reacting absorbent cartridge for a release mechanism has multiple layers of water-absorbing paper material compressed into a solid, densified mass with a fraction of the original volume of the paper layers. The compacted cartridge may be wrapped in a tube of heat-shrink material with holes along its sides or may have adhesive interspersed between layers in order to keep the expansible paper layers together. Another water-reacting absorbent cartridge has multiple layers of a super absorbent material interspersed with layers of paper material compressed into a densified mass. The super absorbent material may be a powder dispersed in paper sheets, or in sheet form with paper layers interposed between. The expansible material may be contained in a jacket made of a water-permeable tightly-woven cotton fabric. Further, an oil-reacting absorbent cartridge is made of one or more layers of polyethylene molecular sponge compressed into a "hat shape" with a protruding portion on one side so that it can be seated in an oil detector unit with its expansion force concentrated through its central portion. One or more holes may be punched through the central portion to provide pathways for the oil and speed up the reaction time of the cartridge by a factor of ten.

Claims5

Dependent claims

An oil-reacting absorbent cartridge for a release mechanism in combination with an oil detector mechanism having retaining means including an abutting wall for retaining an absorbent cartridge therein, exposing means including an aperture in the abutting wall for exposing the absorbent cartridge to the presence of oil in an oil-detection region, and alarm activating means for activating an alarm upon reaction of the absorbent cartridge to the presence of oil, said oil-reacting absorbent cartridge comprising:

one or more layers of an oil-absorbent material compressed by a high compression force into a compact unit having a hat shape with a flat annular base and a central protruding portion projecting a given distance from the flat base in one direction perpendicular to a plane defined by the flat base;
wherein said flat base has a radial spacing from said central protruding portion and a thickness so as to allow the flat base to be retained by the abutting wall of the retaining means in a stationary position within the detector mechanism with its central protruding portion projecting through the aperture of the exposing means of the detector mechanism into an oil-detection region;
and
wherein said flat base has a flat side opposite from the one side thereof from which the protruding portion projects, said flat side being placed flat in physical contact against the alarm activating means of the detector mechanism.

1 more element

Dependencies are inferred from the claim text.