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:
Mar. 05, 1991
Filed:
May. 29, 1990
Roland Kolb, Dielsdorf, CH;
Fritz Spinnler, Mellingen, CH;
BBC Brown Boveri AG, Baden, CH;
Abstract
In a displacement machine for compressible media, having a delivery space (6) which is delimited by spiral-shaped peripheral walls (8, 9) extending perpendicularly from a side wall and leads from an inlet (2) outside the spiral to an outlet (3) inside the spiral, and having a spiral-shaped displacement body (5) which projects into the delivery space (6) and is mounted with respect to the delivery space so as to execute a rotary, twist-free movement, the center (10) of said displacement body is offset eccentrically relative to the center (11) of the peripheral walls (8, 9) in such a way that the displacement body (5) at all times almost touches both the outer and the inner peripheral wall (9 and 8 respectively) of the delivery space (6) at in each case at least one advancing sealing line. The sealing line at the inlet-side end of the outer peripheral wall (9) is advanced relative to the 0.degree./360.degree. position by an angle (.alpha.) between 5.degree. and 50.degree., the peripheral wall (9) forming a circular arc (9') in this angle region.