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:
Dec. 04, 1990
Filed:
Dec. 28, 1989
Applicant:
Inventors:
Josef Heppekausen, Wesseling, DE;
Hans-Peter Kabelitz, Cologne, DE;
Karl-Heinz Ronthaler, Zulpich, DE;
Ralf Steffens, Cologne, DE;
Assignee:
Leybold Aktiengesellschaft, Cologne, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B23P / ;
U.S. Cl.
CPC ...
29888023 ; 2988802 ; 29434 ; 418178 ;
Abstract
A dual-shaft machine comprising a housing, two pistons rotatably mounted in the housing leaving a cold play spacing between one another and said housing, and a coating provided on either the housing or the pistons, or both, to reduce the cold play spacing to that required by the intended field of use of the machine.