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. 01, 1997
Filed:
Aug. 16, 1995
John P Waggoner, Decatur, IN (US);
Amcast Industrial Corporation, Dayton, OH (US);
Abstract
A high pressure forming process is used to form asymmetric scroll compressor elements wherein a single or multiple piece die is closed at one end by a stop which is formed to correspond to a side of the scroll compressor element opposite to a scroll. A punch sized to fit within the die includes an endface having a scroll shaped cavity. A blank of an appropriate metal is placed in the die against the stop and the punch is then inserted into the die and fully extended to form the blank into a scroll compressor element with a single stroke of the punch. The punch includes vent holes for allowing trapped gases and lubricants to escape as the scroll is formed. The punch may also include an ejector system to facilitate removal of the scroll compressor elements from the punch/die combination. The stop may be defined by a second punch which can be moved into the die for forming parts or can be held stationary during part formation and then moved to facilitate removal of scroll compressor elements from the punch/die combination. It may be desired in some applications to heat the die, punch, stop/punch and blanks.