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. 04, 1979
Filed:
Sep. 19, 1977
Robert G Walker, Ossian, IN (US);
Industra Products, Inc., Fort Wayne, IN (US);
Abstract
Method and apparatus for forming a stator for a dynamoelectric machine by inserting prewound coils into a slotted stator core includes enlarging the slot openings or gap between certain adjacent pairs of stator teeth, placing the prewound stator windings in selected stator core slots and thereafter reducing the slot opening or gap between those certain adjacent pairs of teeth. The disclosure apparatus includes a stator bore support and a series of punches to be placed in stator slots and collapsed radially inwardly to bend the stator teeth tips to conform to the bore support. An otherwise conventional coil inserting or injecting machine has unique blades, each of which has a pair of elongated depressions for accepting the respective formed stator teeth tips, and a pair of ribs outside the depression for spanning the corresponding tooth. Reforming of the stator teeth so as to provide a cylindrical bore stator may be accomplished by a plurality of cylindrical rollers which simultaneously engage the stator bore and traverse that bore interior surface to displace the stator teeth tips radially outwardly, thereby providing a wound stator for further processing having a substantially reduced iron gap or for a given iron gap containing windings of a larger wire size than normally insertable in a stator having that iron gap. The slot openings may be enlarged either by mechanical forming of the stator tooth tips or the stator laminations may be initially stamped with this deformation so that the stator core or stack of such laminations need not be mechanically formed to increase the iron gap available for the wire insertion process.