Pump utilizing dissimilar materials to compensate for temperature change
US6648605B2 · kind B2 · utility
5Cited by
7References
19Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 10, 2001 |
| Grant date | Nov 18, 2003 |
| Priority date | — |
| Expiry date | Dec 11, 2021 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B1/2014
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump includes a pump housing that defines an inlet and an outlet. Within the pump housing, there is a barrel that is adjacent to at least one reciprocating piston. A sleeve surrounds the annular outer surface of the piston and is movable. The temperature change within the pump is compensated for by making at least one of the sleeve and the barrel of a material with a lower coefficient of thermal expansion than the material of the piston. A clearance defined by an inner surface of the sleeve and the annular outer surface of the piston increases when the temperature is low and decreases when the temperature is high.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.