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US5871152A Expired / Lapsed US ⏱️ 0.0 years remaining

Remote controlled carpet cleaner

Assignee: Individual
•
Filing: 1997-07-31
•
Granted: 1999-02-16
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Expires: 2017-07-31
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Abstract

Abstract A remote controlled carpet cleaner includes a rectangular outer support frame of structural steel. A gasoline engine drives a vacuum pump and through a pulley and belt assembly is also powers a liquid pump. The exhaust gas from the engine is directed to a heat exchanger which is used to heat water which is pumped through the heat exchanger by the liquid pump. A liquid injector allows carpet cleaning chemicals to be mixed with the water as it enters the pump. The liquid injector is connected to a plurality of solenoid valves. Each solenoid valve is connected to a tank containing a carpet cleaning chemical. When a solenoid valve is opened, a specific carpet cleaning chemical in drawn into the liquid injector and mixed with the water entering the pump. The opening and closing of the solenoid valves is controlled by servo motors operated by a radio controlled receiver. The operator carries a belt mounted transmitter unit which transmits signals to the receiver to thereby direct the opening and closing of the solenoid valves and thus the carpet cleaning chemical to be dispensed. The transmitter unit includes a "lockout" feature to prevent the accidental dispensing of the wrong chemical. The remote controlled carpet cleaner offers a substantial increase in productivity by offering an operator the ability to remotely control and dispense required cleaning chemicals without making repeated trips between the cleaning site and a supply truck.

Inventors

  • 👤 Bahman B. Saney

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-09 22:50
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4083; A47L11/34; A47L11/4088

Claims Analysis

Total Claims: 10
Claim 1
Independent Claim 97 words
A remote controlled carpet cleaner, said remote controlled carpet cleaner comprising: a liquid pump driven by an engine, a heat exchanger, said heat exchanger receiving exhaust gases from said engine to heat a liquid pumped through said heat exchanger by said liquid pump, a liquid injector attached to said liquid pump, a plurality of remotely controlled valves connected to said liquid injector to control the flow of cleaning chemicals to said liquid pump, and said plurality of remotely controlled valves controlled by a receiver in response to a signal generated by a transmitter carried by an operator.
Claim 2
Dependent Claim 97 words
A remote controlled carpet cleaner, said remote controlled carpet cleaner comprising: a liquid pump driven by an engine, a heat exchanger, said heat exchanger receiving exhaust gases from said engine to heat a liquid pumped through said heat exchanger by said liquid pump, a liquid injector attached to said liquid pump, a plurality of remotely controlled valves connected to said liquid injector to control the flow of cleaning chemicals to said liquid pump, and said plurality of remotely controlled valves controlled by a receiver in response to a signal generated by a transmitter carried by an operator.
Claim 3
Dependent Claim 32 words
A remote controlled carpet cleaner according to claim 1 wherein: said remotely controlled solenoid valves are operated by a pressure switch activated by a servo motor in response to said receiver signal.
Claim 4
Dependent Claim 17 words
A remote controlled carpet cleaner according to claim 2 wherein: said remotely controlled valves are solenoid valves.
Claim 5
Dependent Claim 32 words
A remote controlled carpet cleaner according to claim 3 further including: a vacuum pump driven by said engine, and a cleaning wand connected by flexible hose to said remote controlled carpet cleaner.
Claim 6
Dependent Claim 51 words
A remote controlled carpet cleaner according to claim 4 wherein: said flexible hose has first and second parts, said first part connected to said remote controlled carpet cleaner and supplying heated water to said cleaning wand, and said second part connected to said vacuum pump of said remote controlled carpet cleaner.
Claim 7
Independent Claim 137 words
A method of operating a remote controlled carpet cleaner including a liquid pump driven by an engine to pump a liquid through a heat exchanger which receives exhaust gases from said engine to heat said liquid, a liquid injector attached to said liquid pump to inject cleaning chemicals supplied through solenoid valves, said solenoid valves controlled by a receiver in response to a signal generated by a transmitter carried by an operator, said method comprising the steps of: transmitting a signal from an operator carried transmitter to a receiver, receiving said signal from said operator carried transmitter to said receiver, operating a switch in response to a signal from said receiver, opening a solenoid valve in response to the operation of said switch, and dispensing a carpet cleaning chemical through said solenoid valve to said liquid injector.
Claim 8
Independent Claim 137 words
A method of operating a remote controlled carpet cleaner including a liquid pump driven by an engine to pump a liquid through a heat exchanger which receives exhaust gases from said engine to heat said liquid, a liquid injector attached to said liquid pump to inject cleaning chemicals supplied through solenoid valves, said solenoid valves controlled by a receiver in response to a signal generated by a transmitter carried by an operator, said method comprising the steps of: transmitting a signal from an operator carried transmitter to a receiver, receiving said signal from said operator carried transmitter to said receiver, operating a switch in response to a signal from said receiver, opening a solenoid valve in response to the operation of said switch, and dispensing a carpet cleaning chemical through said solenoid valve to said liquid injector.
Claim 9
Dependent Claim 29 words
A method of operating a remote controlled carpet cleaner according to claim 6 wherein: said signal transmitted from an operator carried transmitter to a receiver is a radio signal.
Claim 10
Dependent Claim 26 words
A method of operating a remote controlled carpet cleaner according to claim 7 wherein: said switch is a pressure activated switch operated by a servo motor.

References Cited (Backward Citations)

US3322350A Cited
US3626545A Cited
US4158248A Cited
US4244079A Cited
US4284127A Cited
US5383605A Cited
US5749526A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 2002-02-15 2002-08-17 2003-02-16 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2006-02-15 2006-08-17 2007-02-16 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2010-02-15 2010-08-17 2011-02-16 $7700.00 Window Closed / Lapsed

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