Sensing pump with improved discrimination between liquids and gases
US4747300A · kind A · utility
6Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 25, 1986 |
| Grant date | May 31, 1988 |
| Priority date | — |
| Expiry date | Aug 25, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/7303
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A sensing pump for discriminating between liquids and gases. The pump includes a plunger which is reciprocably moved by a succession of repetitive actuation of known force and time characteristics. The response of the plunger, acting against the fluid is indicative of the quality of the fluid (liquid, gas, or vapor). An orifice is provided in the system which in effect eliminates liquid viscosity as a determinant, and makes the system responsive instead to a mass-transfer regime. This increases the discriminatory capability of the system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.