In-line flow switch
US6472624B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 26, 2000 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Sep 26, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H9/08
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A flow switch for a high pressure washing system or other flow-related system is disclosed. The flow switch switches from an open to a closed position in the presence of adequate flow in a water or other fluid-carrying pipe. The flow switch includes a cartridge body, a sensor, a plunger, a magnet, and a spring. The cartridge body has an inlet port and an outlet port which allows fluid to flow into the cartridge body, through a flow chamber, and out of the cartridge body. The cartridge body also has a sensor chamber for accommodating the sensor. The sensor is positioned within the sensor chamber and is used to determine whether fluid is flowing through the flow chamber. A plunger is positioned within the flow chamber, and is responsive to fluid flow. Between the plunger and the sensor is a spring. The spring prevents the plunger from coming in close proximity to the sensor absent fluid flow. However, when there is fluid flow, the spring is compressed and the plunger comes in close proximity to the sensor and communicates with the sensor to allow the sensor to determine that fluid is flowing through the flow chamber. The flow switch can also include a housing, which accommodates the …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.