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:
Nov. 10, 1998
Filed:
Apr. 23, 1997
Howard E Johnson, Kennesaw, GA (US);
Louis Alan Strihafka, Acworth, GA (US);
Hydro-Drill, Inc., Kennesaw, GA (US);
Abstract
The stator for a helical gear device is formed of a plurality of duplicate disks. The disks each include a convoluted cavity having equally spaced symmetrically radially extending lobes for receiving the convex lobes of the rotor. The disks are assembled into the form of a stator by inserting the disks about a mandrel which includes convoluted lobes, so that the convoluted cavities of the disks follow the shapes of the lobes of the mandrel, thereby causing the disks to be progressively radially offset with respect to one another along the length of the stator. The stacked disks are inserted into a heated cylindrical housing so that the housing forms a shrink fit about the disks. The disks and housing are further connected by brazing, and the disks optionally have openings formed between the lobes which function as convoluted channels through the assembled stator for the passage of liquid, wiring, etc. through the stator.