High pressure cleaning device with leakage flow arrangement
US5525046A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 27, 1996 |
| Grant date | Jun 11, 1996 |
| Priority date | — |
| Expiry date | Jan 27, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7849
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A high pressure cleaning device with a housing (1) containing a driving motor and a pump for cleaning fluid, in particular water, and a bypass valve arrangement, with a valve pistol (2) having a cleaning lance (3) or the like connected thereto, and with a high pressure line (4) leading to valve pistol (2) from a high pressure connection (4) on a housing (1). When the valve pistol (2) is closed, the pump continues to run and circulates, via the bypass valve arrangement, a finite, small volume of cleaning fluid. When the valve pistol (2) is in the closed position, a leakage flow passage having a very high flow resistance remains open, so that, even when the valve pistol (2) is in the closed position, a small leakage flow of cleaning fluid constantly drains out, and is replaced by a corresponding amount of fluid which flows in on the intake side of the pump and cools the circulating fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.