Dual inlet muffler assembly for truck hot water vacuum extraction machine
First Claim
1. A dual inlet muffler assembly for a truck mounted hot water vacuum extraction machine, said machine compris- ing:
- a sealed dirty water vacuum dump tank connected via a hose to a vacuum pick up wand, said wand terminating in a vacuum pick up head having a vacuum slot open to the interior of the wand such that the cleaning liquid and entrained dirt from a surface being cleaned may be returned to the dump tank under vacuum pressure applied to said dump tank,a first motor driven vacuum pump operatively connected to said dump tank, anda second motor driven vacuum pump connected to said dump tank for bringing the pressure of the dump tank down to a sufficiently high vacuum to effectively suck the cleaning liquid and entrained dirt from the surface being cleaned and returning the same to the dump tank,each of said vacuum pumps including positive air pressure exhaust pipes leading therefrom,and wherein said muffler assembly comprises;
a hollow muffler body,a first muffler exhaust pipe extending completely through said body and having an inlet end sealably connected to said first vacuum pump exhaust pipe,a second muffler exhaust pipe having an inlet end sealably connected to said second vacuum pump exhaust pipe and extending into said hollow bod and being dead ended therein,perforations within said first muffler exhaust pipe and said second muffler exhaust pipe over portions internally of said body, anda mass of sound deadening fibers filling the interior of said hollow body about said muffler exhaust pipes;
whereby, exhaust air from said first pump exhausts with little head loss through said first muffler exhaust pipe, said exhaust air from said second pump transfers internally of said muffler body from said second muffler exhaust pipe to said first muffler exhaust pipe through said pipe perforations, and wherein said perforations permit air flow to and from said muffler exhaust pipes and said hollow body to effectively muffle the sound of exhaust gas prior to discharge to the atmosphere from the end of said first exhaust pipe.
1 Assignment
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Accused Products
Abstract
An elongated hollow plastic body mounts a first plastic exhaust pipe of L-shaped configuration which passes completely through the body. Its inlet end is connected to the positive air pressure discharge of one vacuum pump connected to a closed dirty water vacuum dump tank for the hot water vacuum extraction machine. A second plastic L-shaped exhaust pipe is reversely oriented within the hollow body and has a plugged end abutting the side of first pipe near its inlet to the body. Both pipes are perforated within portions internal of the body and the hollow body is filled with glass wool to muffle the sound. The second pipe at its inlet end, is connected to the positive pressure air discharging from a second vacuum pump also connected to the vacuum dump tank. The exhaust from the vacuum pumps is effectively muffled with the air discharging through the perforations upstream of the plugged end of the second pipe passing through the glass wool, entering the perforations in the first pipe, and mixing commonly with the exhaust air flow carried by the first pipe.
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Citations
4 Claims
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1. A dual inlet muffler assembly for a truck mounted hot water vacuum extraction machine, said machine compris- ing:
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a sealed dirty water vacuum dump tank connected via a hose to a vacuum pick up wand, said wand terminating in a vacuum pick up head having a vacuum slot open to the interior of the wand such that the cleaning liquid and entrained dirt from a surface being cleaned may be returned to the dump tank under vacuum pressure applied to said dump tank, a first motor driven vacuum pump operatively connected to said dump tank, and a second motor driven vacuum pump connected to said dump tank for bringing the pressure of the dump tank down to a sufficiently high vacuum to effectively suck the cleaning liquid and entrained dirt from the surface being cleaned and returning the same to the dump tank, each of said vacuum pumps including positive air pressure exhaust pipes leading therefrom, and wherein said muffler assembly comprises; a hollow muffler body, a first muffler exhaust pipe extending completely through said body and having an inlet end sealably connected to said first vacuum pump exhaust pipe, a second muffler exhaust pipe having an inlet end sealably connected to said second vacuum pump exhaust pipe and extending into said hollow bod and being dead ended therein, perforations within said first muffler exhaust pipe and said second muffler exhaust pipe over portions internally of said body, and a mass of sound deadening fibers filling the interior of said hollow body about said muffler exhaust pipes; whereby, exhaust air from said first pump exhausts with little head loss through said first muffler exhaust pipe, said exhaust air from said second pump transfers internally of said muffler body from said second muffler exhaust pipe to said first muffler exhaust pipe through said pipe perforations, and wherein said perforations permit air flow to and from said muffler exhaust pipes and said hollow body to effectively muffle the sound of exhaust gas prior to discharge to the atmosphere from the end of said first exhaust pipe. - View Dependent Claims (2, 3, 4)
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Specification