Patent US3608824A successfully refreshed from Google Patents.
US3608824A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High-pressure washing equipment
Assignee: LENNAWILL Inc
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Filing: 1970-03-30
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Granted: 1971-09-28
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Expires: 1990-03-30
Abstract
Abstract High-pressure washing equipment adapted to deliver either of two cleaning fluids selectively against hard surfaces to be cleaned and having for its principal object to provide simplified controls adapted to be selectively operated to deliver a multiplicity of cleaning fluids in the form of a high-pressure and high-velocity spray, said equipment incorporating a sequential valve.
Inventors
- 👤 Milton L Ballou
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 09:40
CPC Classifications
B; B08; B08B; B08B3/00; B08B3/02; B08B3/026; B08B3/028; B05; B05B; B05B12/00; B05B12/14; B05B12/1418; B05B7/00; B05B7/24; B05B7/26; B05B7/28; B05B7/30; B05B7/32; B60; B60S; B60S3/00; B60S3/04; B60S3/044; B08B2203/00; B08B2203/02; B08B2203/0205; B08B2203/0217; B08B2203/0282; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2559; Y10T137/2574; Y10T137/2605; Y10T137/2617
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
In a pressure washer, a power-driven pump having an inlet and an outlet connected by a flexible conduit to a spray head including a handle for directing the spray from said head, a first valve controlling flow through said head; conduit means for supplying liquid to the inlet of said pump and having a first branch connected to a source of water and a second branch connected to a source of cleaning fluid, and a second sequential valve controlling flow of cleaning fluid through said second branch to said pump inlet, the improvements which comprise a sequential valve which is opened and closed in response to the movement of the stem of an unloader valve for opening and closing the conduit supplying soap solution to the system.
Claim 2
Dependent Claim
127 words
In a pressure washer, a power-driven pump having an inlet and an outlet connected by a flexible conduit to a spray head including a handle for directing the spray from said head, a first valve controlling flow through said head; conduit means for supplying liquid to the inlet of said pump and having a first branch connected to a source of water and a second branch connected to a source of cleaning fluid, and a second sequential valve controlling flow of cleaning fluid through said second branch to said pump inlet, the improvements which comprise a sequential valve which is opened and closed in response to the movement of the stem of an unloader valve for opening and closing the conduit supplying soap solution to the system.
Claim 3
Dependent Claim
53 words
A pressure washer, in accordance with claim 1, in which said sequential valve is operated by a lever and ratchet in response to the movement of the stem of an unloader valve which is actuated by a piston responding to the pressure upon the closing of a shutoff valve in a spray head.
Claim 4
Dependent Claim
42 words
A pressure washer, in accordance with claim 1, in which a toggle switch is operated in response to the movement of a piston stem of an unloader valve which opens and closes a circuit for operating and shutting off a motor-driven pump.
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) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |