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. 06, 2005
Filed:
Feb. 20, 2001
Vittorio Bianchi, Ferrera di Varese, IT;
Vittorio Bianchi, Ferrera di Varese, IT;
Embraco Europe S.r.l., Turin, IT;
Abstract
A method of manufacturing a compressor valve plate () comprises at least the following steps in succession: blanking of a blank of the plate () from a steel sheet of suitable thickness, punching holes corresponding to the output and intake openings, the hole corresponding to the output opening being a preliminary hole () having a diameter larger than the final diameter of this opening (), forming, by coining, a depression () for housing an output valve-closure blade (), with the depth of the depression increasing towards the end of the depression which corresponds to the preliminary hole (), in a manner such that, during the coining, at least some of the material of the blank creeps towards the preliminary hole, partially filling it, calibrating the output opening () to the final diameter by punching, and coining an annular projection () around the calibrated output opening () to define a valve seat for the output closure blade.