Pipes and tubular conduits – Flexible – Braided – interlaced – knitted or woven
Reexamination Certificate
2000-05-22
2002-01-08
Brinson, Patrick (Department: 3752)
Pipes and tubular conduits
Flexible
Braided, interlaced, knitted or woven
C138S126000, C138S141000, C138S137000
Reexamination Certificate
active
06336473
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a kink resistant light weight, thin walled hose.
DESCRIPTION OF THE PRIOR ART
For several years now, nozzle manufacturers have been producing so-called “low pressure nozzles”. These nozzles are intended to flow large amounts of water at low pressures and hence reduce fire fighter fatigue, among other things. A side effect of these nozzles is that the current light weight, thin walled hoses that are presently on the market tend to kink directly behind the nozzleman and reduce the flow of water. This problem has only come to light in the last few years and has been of particular concern to many more fire departments very recently. Older style hoses that are bulky and stiff do not exhibit this tendency but are, for obvious reasons, undesirable due to their weight and bulk.
There thus exists a need for a hose that retains all of the desirable features of a light weight, thin walled hose, but at the same time is rigid enough at low pressures to reduce kinking.
SUMMARY OF THE INVENTION
An object of the present invention is to obviate the above-noted defects in the prior art. In accordance with the invention, this object is achieved with a kink resistant, low weight, thin walled hose comprising:
a circular woven inner jacket reinforcement;
an extruded inner tubing bonded to the inner surface of the inner jacket;
a circular woven outer jacket reinforcement; and
an extruded polyurethane tubing bonded to the inner surface of the outer jacket and located between the inner and outer jackets.
REFERENCES:
patent: 1978211 (1934-10-01), Loughead
patent: 2515929 (1950-07-01), Ofeldt
patent: 3287315 (1966-11-01), Connor et al.
patent: 3725167 (1973-04-01), Love et al.
patent: 3750712 (1973-08-01), Brand
patent: 4111237 (1978-09-01), Mutzner et al.
patent: 4431031 (1984-02-01), Ettlinger
patent: 5372163 (1994-12-01), Kokuryu et al.
patent: 5445191 (1995-08-01), Green et al.
Brinson Patrick
Darby & Darby
Niedner Ltd.
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