US4284127A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Carpet cleaning systems
Assignee: SYD W COLLIER CO Ltd
•
Filing: 1979-06-01
•
Granted: 1981-08-18
•
Expires: 1999-06-01
Abstract
Abstract The specification describes an arrangement adapted for use in a carpet cleaning system and more particularly, an arrangement in which the heat given off by an internal combustion engine, is used through heat transfer to heat cleaning fluid of the carpet cleaning system. The cleaning fluid is carried in its own conduit so that it is maintained out of contact from the engine itself. The bulk of the heat picked up by the cleaning fluid is through heat transfer at the exhaust of the engine although, a preheat may also be incorporated from heat transfer at the engine's cooling system. Shutdown controls are provided to automatically shut the system down in case of malfunction, to ensure that the system does not overheat.
Inventors
- 👤 David S. Collier
- 👤 Allan S. Muxworthy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:06
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/408; A47L11/4086; A47L11/34; A47L11/4094; F; F02; F02G; F02G5/00; F02G5/02; F02G5/04; Y; Y02; Y02T; Y02T10/00; Y02T10/10; Y02T10/12
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A fluid heating system for use in an engine having heated engine coolant and heated exhaust, said system comprising a preheater through which the heated engine coolant is conducted, a heater exchanger through which the heated exhaust is directed, fluid conduit means in both the preheater and the heat exchanger to maintain the fluid separately of the heated coolant and exhaust respectively, sensing means for sensing the presence of fluid in the heat exchanger, a temperature sensor, for sensing the temperature of the fluid from the heat exchanger and exhaust bypass for bypassing the heated exhaust away from the heat exchanger when the fluid temperature is at an unacceptably high level as sensed by the temperature sensor and automatic shutdown controls for shutting the engine off in the event of system malfunction.
Claim 2
Dependent Claim
132 words
A fluid heating system for use in an engine having heated engine coolant and heated exhaust, said system comprising a preheater through which the heated engine coolant is conducted, a heater exchanger through which the heated exhaust is directed, fluid conduit means in both the preheater and the heat exchanger to maintain the fluid separately of the heated coolant and exhaust respectively, sensing means for sensing the presence of fluid in the heat exchanger, a temperature sensor, for sensing the temperature of the fluid from the heat exchanger and exhaust bypass for bypassing the heated exhaust away from the heat exchanger when the fluid temperature is at an unacceptably high level as sensed by the temperature sensor and automatic shutdown controls for shutting the engine off in the event of system malfunction.
Claim 3
Dependent Claim
162 words
A cleaning solution heating arrangement for use in a carpet cleaning system comprising an engine producing heated engine coolant and heated exhaust, an immersion preheater through which the heated engine coolant is conducted, a heat exchanger at the heated exhaust, liquid conduit means in both said preheater and said heat exchanger for separation of the heated coolant and exhaust respectively from the cleaning solution in the preheater and heat exchanger, a sensor for sensing the presence of cleaning solution in the heat exchanger and for shutting the engine down in the absence of cleaning solution in the heat exchanger, a temperature sensor for sensing the temperature of the cleaning solution from the heat exchanger and a bypass controlled by the temperature sensor for bypassing the heated exhaust from the heat exchanger when the cleaning solution temperature exceeds a preset maximum and for directing the heated exhaust to the heat exchanger when the temperature of the cleaning solution falls below the preset maximum.
Claim 4
Dependent Claim
162 words
A cleaning solution heating arrangement for use in a carpet cleaning system comprising an engine producing heated engine coolant and heated exhaust, an immersion preheater through which the heated engine coolant is conducted, a heat exchanger at the heated exhaust, liquid conduit means in both said preheater and said heat exchanger for separation of the heated coolant and exhaust respectively from the cleaning solution in the preheater and heat exchanger, a sensor for sensing the presence of cleaning solution in the heat exchanger and for shutting the engine down in the absence of cleaning solution in the heat exchanger, a temperature sensor for sensing the temperature of the cleaning solution from the heat exchanger and a bypass controlled by the temperature sensor for bypassing the heated exhaust from the heat exchanger when the cleaning solution temperature exceeds a preset maximum and for directing the heated exhaust to the heat exchanger when the temperature of the cleaning solution falls below the preset maximum.
Claim 5
Dependent Claim
29 words
A system as claimed in claim 2, wherein said internal liquid conduit means consists of a plurality of small tubes immersed within the heated engine coolant in the preheater.
Claim 6
Dependent Claim
31 words
A system as defined in claim 2, including a plurality of small tubes extending through the exhaust heat exchanger for conducting the heated engine exhaust therethrough, separately of the cleaning solution.
Claim 7
Dependent Claim
46 words
A system as defined in claim 2, including a solution holding tank to which the cleaning solution is supplied from the exhaust heat exchanger and a recirculation line from the solution holding tank to the exhaust heat exchanger, said recirculation line being controlled by valve means.
Claim 8
Dependent Claim
47 words
A system as defined in claim 5 wherein the cleaning solution holding tank is provided with a reed float switch and including a cleaning solution entry line which is opened and closed according to the position of the reed float switch in the cleaning solution holding tank.
Claim 9
Dependent Claim
63 words
A system as defined in claim 2 including a water supply sensing switch and a further temperature sensor for sensing the temperature of the cleaning solution immediately after it leaves the exhaust heat exchanger and a monitoring system for monitoring said water supply sensing switch and said further temperature sensor and for shutting the system down in the event of a system failure.
Claim 10
Dependent Claim
28 words
A system as defined in claim 7 wherein said monitoring system shuts the system down in the event of poor cleaning solution flow through the exhaust heat exchanger.
Claim 11
Dependent Claim
24 words
A system as defined in claim 3 including a chemical cleaner injector for injecting a metered amount of chemical cleaner into the water supply.
Claim 12
Dependent Claim
38 words
A system as defined in claim 2 including an injector for injecting a fine spray of liquid to the intake manifold of the internal combustion engine in the event that the engine is shutdown to prevent engine runon.
Claim 13
Dependent Claim
36 words
A system as defined in claim 4, including a cleaning tool supplied with cleaning solution heated by the internal combustion engine and a vacuum operated recovery tank for recovering cleaning solution dispensed from said cleaning tool.
References Cited (Backward Citations)
US1986893A
Cited
US2103947A
Cited
US2903189A
Cited
US3092325A
Cited
US3131757A
Cited
US3223150A
Cited
US3341081A
Cited
US3556402A
Cited
US4109340A
Cited
US4196854A
Cited
US4190205A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-08-17 | 1985-02-16 | 1985-08-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-17 | 1989-02-16 | 1989-08-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-17 | 1993-02-16 | 1993-08-18 | $7700.00 | Window Closed / Lapsed |