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:
Apr. 18, 2017
Filed:
Dec. 06, 2011
Rudolf Bahnen, Roetgen, DE;
Uwe Drewes, Velbert, DE;
Klaus Rofall, Breckerfeld, DE;
Markus Loebel, Bochum, DE;
Rudolf Bahnen, Roetgen, DE;
Uwe Drewes, Velbert, DE;
Klaus Rofall, Breckerfeld, DE;
Markus Loebel, Bochum, DE;
Gebr. Becker GmbH, Wuppertal, DE;
Abstract
The invention relates to a vacuum pump, in particular a screw pump, having preferably two displacement body shafts (), coupled via a gearing, which drive displacement bodies (), and having an inner recess (), extending in the direction of a geometric axis (A) of the displacement body shaft (), in which a tubular body () extends for conducting cooling fluid while leaving a free space between an inner surface of the recess () and an outer surface of the body (). To provide a vacuum pump which has a configuration having a simple construction and which is effective with regard to cooling power, it is proposed that the body () is in addition secured in a separate cover part () mounted on the suction-side end of the displacement body (), and that the free space is formed, at least in part, directly between the body () and the inner surface of the displacement body () and extends continuously from the cover part () to a securing region of the body () in the displacement body shaft (), in a region of the displacement body shaft () associated with the motor/gearing housing () of the displacement body shaft ().