The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 23, 1986
Filed:
Jan. 29, 1985
Applicant:
Inventors:
Lutz Arndt, Troisdorf, DE;
Paul Bachmann, Cologne, DE;
Hanns-Peter Berges, Cologne, DE;
Wolfgang Leier, Bergisch Gladbach, DE;
Dieter Vorberg, Erftstadt-Lechenich, DE;
Assignee:
Leybold-Heraeus GmbH, Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E03B / ;
U.S. Cl.
CPC ...
137565 ; 13724741 ; 13724749 ; 1372511 ; 92 83 ;
Abstract
A vacuum pump and trap combination in which the trap is configured in the manner of a siphon and comprises a tube immersed in trap liquid but having an opening lying above the trap liquid level. The tube has a wall section lying below the trap liquid level and having perforations therein to admit different amounts of trap liquid in relation to the rate of discharge gas flow, thereby preventing frothing of the trap liquid.