US3812552A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cleaning apparatus for carpets and the like
Assignee: Steamatic Inc
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Filing: 1972-09-14
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Granted: 1974-05-28
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Expires: 1992-09-14
Abstract
Abstract Carpet or upholstery cleaning apparatus uiltizing hot cleaning fluid, for instance, water with or without additives, has its heating device located remotely from the suction nozzle so as to simplify the construction thereof and reduce its bulk. In order to insure a constant supply of hot cleaning fluid adjacent the nozzle unit, a bypass line is provided which constantly returns the fluid to the heating element when the fluid is not being impinged on the work. The heating device may be located on a remote carriage which also carries the dirt separating suction tank, a cleaning fluid reservoir, and the cleaning fluid and suction pumps, or it may be mounted directly on the handle of the nozzle unit.
Inventors
- 👤 W Blackmon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:13
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4044; A47L11/34; A47L11/408; A47L11/4086
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
140 words
Carpet cleaning apparatus comprising a suction nozzle unit having an opening for presentation to a carpet to be cleaned and a handle, a jet element mounted to dicharge cleaning fluid against the carpet adjacent said unit, a fluid pump, a source of cleaning fluid connected to the inlet of said pump, a fluid heating device connected to the outlet of said pump, a connection between said device and said jet element, a return connection between said first connection and the inlet of said pump, valve means at the intersection of said interconnection controlling said connections for alternately directing discharge from said heating device to said jet element and said return connection, a manual control for said valve means, and a suction pump connected to said nozzle unit for withdrawing from the carpet cleaning fluid deposited thereon from said jet element.
Claim 2
Dependent Claim
140 words
Carpet cleaning apparatus comprising a suction nozzle unit having an opening for presentation to a carpet to be cleaned and a handle, a jet element mounted to dicharge cleaning fluid against the carpet adjacent said unit, a fluid pump, a source of cleaning fluid connected to the inlet of said pump, a fluid heating device connected to the outlet of said pump, a connection between said device and said jet element, a return connection between said first connection and the inlet of said pump, valve means at the intersection of said interconnection controlling said connections for alternately directing discharge from said heating device to said jet element and said return connection, a manual control for said valve means, and a suction pump connected to said nozzle unit for withdrawing from the carpet cleaning fluid deposited thereon from said jet element.
Claim 3
Dependent Claim
31 words
Carpet cleaning apparatus as described in claim 1 in which said valve means is a three-way valve controlling connections between said first conNection and said jet element and said return connection.
Claim 4
Dependent Claim
18 words
Carpet cleaning apparatus as described in claim 1 in which said heating device is mounted on said handle.
Claim 5
Dependent Claim
18 words
Carpet cleaning apparatus as described in claim 1 in which said valve means is mounted on said handle.
Claim 6
Dependent Claim
140 words
Carpet cleaning apparatus comprising a suction unit for presentation to a carpet to be cleaned and having an elongated handle, a three-way valve mounted on the lower part of said handle, a jet element operatively connected to said valve, and disposed to discharge cleaning fluid adjacent said unit, a fluid pump, a heating device, a source of cleaning fluid connected to the inlet of said pump, the outlet of said pump and said heating device being connected in series to said valve, a return line from said valve to the inlet of said pump, a control for said valve to selectively direct fluid from said pump to either said jet element or said return line for insuring the maintenance of a supply of heated cleaning fluid near said jet element, and a suction pump operatively connected to said nozzle unit.
Claim 7
Dependent Claim
140 words
Carpet cleaning apparatus comprising a suction unit for presentation to a carpet to be cleaned and having an elongated handle, a three-way valve mounted on the lower part of said handle, a jet element operatively connected to said valve, and disposed to discharge cleaning fluid adjacent said unit, a fluid pump, a heating device, a source of cleaning fluid connected to the inlet of said pump, the outlet of said pump and said heating device being connected in series to said valve, a return line from said valve to the inlet of said pump, a control for said valve to selectively direct fluid from said pump to either said jet element or said return line for insuring the maintenance of a supply of heated cleaning fluid near said jet element, and a suction pump operatively connected to said nozzle unit.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-27 | 1977-11-26 | 1978-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-27 | 1981-11-26 | 1982-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-27 | 1985-11-26 | 1986-05-28 | $7700.00 | Window Closed / Lapsed |