US3705437A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combination high pressure washer and vacuum
Assignee: CLEANING SYSTEMS IND Inc
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Filing: 1970-08-17
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Granted: 1972-12-12
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Expires: 1990-08-17
Abstract
Abstract A cleaning device having a cleaning head for working over a surface to be cleaned. The head forms an elongated suction channel which is connected to a vacuum system. A high pressure liquid line is connected to a nozzle which directs a patterned jet of liquid to the cleaning surface through the suction channel. A shield assembly separates the liquid jet from the suction channel and is adjustable to correspond to the desired liquid jet pattern. The vacuum line and liquid line are removably attached to an outlet which connects the liquid line to a pumping station where cleaning and rinsing liquid are selectively supplied to the line in response to electrical signals from a set of dead man switches on the cleaning device, while the vacuum system is controlled by an on-off switch at the outlet.
Inventors
- 👤 Louis Rukavina Jr
- 👤 Robert L Brower
- 👤 Daniel J Lane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:23
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4044; A47L11/29; A47L11/30; A47L11/4075; A47L11/4077; A47L11/408; A47L11/4088; A47L5/00; A47L5/12; A47L5/22; A47L5/38
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
195 words
In a cleaning system having a high pressure washing system and a vacuum system, a portable accessory for combining said washing and vacuum systems and for working over a surface to be cleaned; the portable accessory comprising: a vacuum head connected to said vacuum system, said head having an open bottom and defining a suction channel from said bottom to said vacuum system; a high pressure liquid spray nozzle on said head and connected to said washing system, said nozzle having a discharge opening positioned to direct a high pressure spray of liquid through said suction channel to said open bottom of said head; a shield within said head and in communication with the discharge opening of said nozzle to receive said spray, the walls of said shield being spaced inwardly from the walls of said head, whereby said suction channel encompasses said shield, a high pressure cleaning liquid being discharged through said discharge opening and said shield to said surface and the spent cleaning liquid being removed through said suction channel, and adjusting means movably mounted through said head and engaging said shield walls for adjusting said shield walls with respect to said head.
Claim 2
Dependent Claim
195 words
In a cleaning system having a high pressure washing system and a vacuum system, a portable accessory for combining said washing and vacuum systems and for working over a surface to be cleaned; the portable accessory comprising: a vacuum head connected to said vacuum system, said head having an open bottom and defining a suction channel from said bottom to said vacuum system; a high pressure liquid spray nozzle on said head and connected to said washing system, said nozzle having a discharge opening positioned to direct a high pressure spray of liquid through said suction channel to said open bottom of said head; a shield within said head and in communication with the discharge opening of said nozzle to receive said spray, the walls of said shield being spaced inwardly from the walls of said head, whereby said suction channel encompasses said shield, a high pressure cleaning liquid being discharged through said discharge opening and said shield to said surface and the spent cleaning liquid being removed through said suction channel, and adjusting means movably mounted through said head and engaging said shield walls for adjusting said shield walls with respect to said head.
Claim 3
Dependent Claim
47 words
The structure of claim 1, and including a foot ring secured about the periphery of said open bottom of the head, said foot ring forming an extension of said suction channel and being permeable to the flow of air to permit air flow into said suction channel.
Claim 4
Dependent Claim
18 words
The structure of claim 1, wherein said shield is mounted for pivotal movement with respect to the nozzle.
Claim 5
Dependent Claim
211 words
In a cleaning system having a high pressure washing system and a vacuum system, a portable accessory for combining said washing and vacuum systems and for working over a surface to be cleaned; the portable accessory comprising: a vacuum head connected to said vacuum system, said head having an open bottom and defining a suction channel from said bottom to said vacuum system; a high pressure liquid spray nozzle on said head and connected to said washing system, said nozzle having a discharge opening positioned to direct a high pressure spray of liquid through said suction channel to said open bottom of said head; a shield within said head and in communication with the discharge opening of said nozzle to receive said spray, the walls of said shield being spaced inwardly from the walls of said head, whereby said suction channel encompasses said shield, a high pressure cleaning liquid being discharged through said discharge opening and said shield to said surface and the spent cleaning liquid being removed through said suction channel, said shield being elongated in cross section and having a substantially greater length than width; and means for varying the width of said shield to thereby adjust the spray pattern of the cleaning liquid being discharged from said shield.
Claim 6
Dependent Claim
211 words
In a cleaning system having a high pressure washing system and a vacuum system, a portable accessory for combining said washing and vacuum systems and for working over a surface to be cleaned; the portable accessory comprising: a vacuum head connected to said vacuum system, said head having an open bottom and defining a suction channel from said bottom to said vacuum system; a high pressure liquid spray nozzle on said head and connected to said washing system, said nozzle having a discharge opening positioned to direct a high pressure spray of liquid through said suction channel to said open bottom of said head; a shield within said head and in communication with the discharge opening of said nozzle to receive said spray, the walls of said shield being spaced inwardly from the walls of said head, whereby said suction channel encompasses said shield, a high pressure cleaning liquid being discharged through said discharge opening and said shield to said surface and the spent cleaning liquid being removed through said suction channel, said shield being elongated in cross section and having a substantially greater length than width; and means for varying the width of said shield to thereby adjust the spray pattern of the cleaning liquid being discharged from said shield.
Claim 7
Dependent Claim
38 words
The structure of claim 4, whereby said shield is formed of a relatively flexible material and said means for varying the width of the shield comprises an adjusting member extending through said head and engaged with said shield.
References Cited (Backward Citations)
US919606A
Cited
FR381256A
Cited
US2270579A
Cited
GB892658A
Cited
US3422482A
Cited
US3438580A
Cited
US3496592A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-12-12 | 1976-06-12 | 1976-12-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-12-12 | 1980-06-12 | 1980-12-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-12-12 | 1984-06-12 | 1984-12-12 | $7700.00 | Window Closed / Lapsed |