Method for producing a helical stator

Details Method for producing a helical stator Method for producing a helical stator

2007-07-12

2009-10-20

Trinh, Minh (Department: 3729)

Metal working

Method of mechanical manufacture

Electrical device making

C029S596000, C029S605000, C029S609000, C072S137000, C072S168000, C310S216006

Reexamination Certificate

active

07603760

ABSTRACT:
In a method or system for producing a helical stator, a stator core strip is provided having a base portion with spaced tangs extending from the base portion. The strip is driven in a feed direction toward a bending region. At the bending region the strip is bent with an outside pressure member positioned to apply pressure at an outside edge of the strip base portion and with an inside pressure wheel having a plurality of teeth. A backstop surface of the teeth contact an inside edge of the base portion between adjacent tangs to support the base portion as the strip is bent by the outside pressure member. A winding arbor receives the bent strip to collect multiple turns of the bent strip to form the helical stator.

REFERENCES:
patent: 3243623 (1966-03-01), Hart
patent: 3845647 (1974-11-01), Cockin
patent: 4395815 (1983-08-01), Stanley et al.
patent: 4909057 (1990-03-01), Fritzsche
patent: 5265320 (1993-11-01), Greenway
patent: 5827166 (1998-10-01), Cestonaro et al.
patent: 6147431 (2000-11-01), Asao et al.
patent: 6792673 (2004-09-01), Barrera et al.

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