Pump with undulating pump element
US5352103A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | May 18, 1993 |
| Grant date | Oct 4, 1994 |
| Priority date | — |
| Expiry date | May 18, 2013 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04C15/0096
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A pump comprises a pump casing having a pump channel, a pump element rotating in the pump channel, and a rotor shaft mounted in the pump casing and attached to the pump element. The pump element has a cylindrical outer periphery, and undulating surfaces in the axial direction. The opening in the casing which receives the rotor shaft has an annular groove in which there is disposed a spring loaded sealing element which bears slidably against a flat end face of the pump element when the pump element rotates. The sealing element is subjected to the pressure of superheated steam which is conducted to the sealing element via pressure channels in the pump casing connected to the annular groove. The rotor shaft includes radial and axial channels through which a coolant flows.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.