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. 04, 1995
Filed:
Feb. 28, 1994
Bruce A Maki, Warren, MI (US);
David L Thompson, Clinton Township, Macomb County, MI (US);
Hypro Corporation, St. Paul, MN (US);
Abstract
An improved method for manufacturing a sophisticated cam profile liner used in pumps and compressors. A non-circular cam profile liner is fabricated from multiple parts, preferably two identical cam liner halves mated together. Each cam profile liner half is generally crescent-shaped, and is manufactured from a single mold using conventional molding techniques. Window openings are formed in the cam profile liner without the need for hand-placing inserts in the mold. Further, no taper is formed in the cam profile liner. Accordingly, the present invention is suitable for use in precision sliding vane pumps, as well as flexible and roller-type pumps. Since each cam profile liner half is identical to the other, a symmetrical cam chamber is defined by the cam profile liner.