EP 0253122 A3 19880810 - PISTONPUMP FOR CRYOGENIC LIQUIDS
Title (en)
PISTONPUMP FOR CRYOGENIC LIQUIDS
Publication
Application
Priority
DE 3621727 A 19860628
Abstract (en)
[origin: US4792289A] In a reciprocating pump for cryogenic fluids comprising a pump cylinder in which a piston is oscillatingly displaceable in a sealed state, an inlet valve and an outlet valve, and an annular channel surrounding the pump cylinder on the outer side and forming an outlet for the cryogenic fluid delivered by the pump, in order to attain optimum sealing at the operating temperatures, without the piston motion being impeded at higher temperatures, it is proposed that the cylinder be made of a material with good sliding and self-lubricating properties and a thermal expansion coefficient which is larger than that of the piston, that the dimensions of the cylinder and the piston be so selected that the piston sealingly contacts the inside wall of the cylinder at operating temperature, and that the outlet valve be arranged at the downstream end of the annular channel.
IPC 1-7
IPC 8 full level
F04B 15/08 (2006.01); F04B 53/14 (2006.01)
CPC (source: EP US)
F04B 15/08 (2013.01 - EP US); Y10S 417/01 (2013.01 - EP US); Y10S 417/901 (2013.01 - EP US)
Citation (search report)
- [A] US 3145629 A 19640825 - GOTTZMANN CHRISTIAN F
- [A] GB 751062 A 19560627 - UNION CARBIDE & CARBON CORP
- [A] AT 212706 B 19610110 - UNION CARBIDE CORP
- [A] US 4143520 A 19790313 - ZIMMERMAN JAMES E
- [A] CH 359977 A 19620131 - NORDDEUTSCHE CHEMISCHE WERKE G [DE]
Designated contracting state (EPC)
FR GB IT SE
DOCDB simple family (publication)
EP 0253122 A2 19880120; EP 0253122 A3 19880810; EP 0253122 B1 19910605; DE 3621727 A1 19880114; DE 3621727 C2 19890119; JP S6336068 A 19880216; US 4792289 A 19881220
DOCDB simple family (application)
EP 87108050 A 19870604; DE 3621727 A 19860628; JP 15795387 A 19870626; US 6312587 A 19870617