Cleaning system
First Claim
1. A cleaning system comprising cleaning liquid, a liquid heating system, a spray nozzle for spraying heated liquid onto a surface to be cleaned, a vacuum nozzle for retrieving liquid sprayed by said spray nozzle, a vacuum pump having an inlet and an outlet, means connecting the inlet of said vacuum pump to said vacuum nozzle for withdrawing liquid and air into said vacuum nozzle, and means connected to the outlet of said vacuum pump for conveying air leaving said pump to said liquid heating system to impart heat from said air to said cleaning liquid.
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Accused Products
Abstract
A cleaning system utilizes heat from an internal combustion engine to heat cleaning liquid which is sprayed onto a surface to be cleaned. The internal combustion engine drives a vacuum pump which withdraws air and cleaning liquid through a vacuum nozzle for retrieving cleaning liquid and soil. The heated air leaving a vacuum pump is combined with heated exhaust gasses from said engine and heat from the mixture is extracted to heat the cleaning liquid. The cleaning liquid may be further heated by heat extracted from the engine by a cooling system.
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Citations
9 Claims
- 1. A cleaning system comprising cleaning liquid, a liquid heating system, a spray nozzle for spraying heated liquid onto a surface to be cleaned, a vacuum nozzle for retrieving liquid sprayed by said spray nozzle, a vacuum pump having an inlet and an outlet, means connecting the inlet of said vacuum pump to said vacuum nozzle for withdrawing liquid and air into said vacuum nozzle, and means connected to the outlet of said vacuum pump for conveying air leaving said pump to said liquid heating system to impart heat from said air to said cleaning liquid.
- 7. A cleaning system comprising cleaning liquid, a liquid heating system, a spray nozzle for spraying heated liquid onto a surface to be cleaned, a vacuum nozzle for retrieving liquid sprayed by said spray nozzle, a vacuum pump having an inlet and an outlet, means connecting the inlet of said vacuum pump to said vacuum nozzle for withdrawing liquid and air into said vacuum nozzle, means connected to the outlet of said vacuum pump for conveying air away from said vacuum pump, an internal combustion engine for driving said vacuum pump, said engine producing heated exhaust gases when operating, means for conveying said exhaust gases away from said engine, means for mixing the air conveyed away from said pump with exhaust gases conveyed away from said engine and means for conveying that mixture to said liquid heating system for heating said cleaning liquid.
Specification