External-rotor motor having a stationary bearing shaft

Details External-rotor motor having a stationary bearing shaft External-rotor motor having a stationary bearing shaft

2006-02-24

2009-06-16

Hanh, Nguyen N (Department: 2834)

Electrical generator or motor structure

Dynamoelectric

Rotary

Reexamination Certificate

active

07548003

ABSTRACT:
An improved drum motor, preferably electronically commutated, features a unitary stationary central shaft (18) supporting a stationary inner stator (52), and an external rotor (49), including permanent magnets (54), secured to an inner surface of a generally cylindrical rotatable casing part (18). This permits variable speed operation while avoiding any need for an internal gear linkage. Safety is improved by making sealing plates (76, 78) at respective axial ends of the casing (14) stationary, and providing an annular peripheral seal (90) around each sealing plate. Respective rolling bearings (24, 44) near each end of the casing (14) facilitate rotation of the external rotor (49) relative to the stator (52), and a clamping arrangement (30) minimizes noise from the bearings.

REFERENCES:
patent: 4121127 (1978-10-01), Adelski et al.
patent: 4651241 (1987-03-01), von der Heide et al.
patent: 4980587 (1990-12-01), Yonei et al.
patent: 5128571 (1992-07-01), Itsu
patent: 5598047 (1997-01-01), Sakuragi et al.
patent: 5744888 (1998-04-01), Zajc et al.
patent: 5798589 (1998-08-01), Ohi et al.
patent: 5918728 (1999-07-01), Syverson
patent: 5945751 (1999-08-01), Hans et al.
patent: 6012723 (2000-01-01), Beeck
patent: 6166468 (2000-12-01), Suzuki et al.
patent: 6244427 (2001-06-01), Syverson
patent: 6455960 (2002-09-01), Trago et al.
patent: 6592678 (2003-07-01), Kamikawa et al.
patent: 0 460 383 (1925-09-01), None
patent: 33 48 495 (1984-03-01), None
patent: 41 21 428 (1993-01-01), None
patent: 295 04 640 (1995-06-01), None
patent: 195 03 610 (1996-08-01), None
patent: 296 11 097 (1996-10-01), None
patent: 195 23 789 (1997-01-01), None
patent: 297 17 062 (1998-02-01), None
patent: 196 40 979 (1998-04-01), None
patent: 198 00 989 (1999-07-01), None
patent: 299 03 942 (1999-07-01), None
patent: 296 23 889 (2000-06-01), None
Sparks Belting Co. of Mich., “Dura-Drive conveyor belt motors,” retrieved Nov. 2008 from WWW.SPARKSBELTING.COM/MOTORIZED-PULLEYS.HTML via Internet.
BDL Maschinenbau GmbH, Wassenberg, Germany, “General Descr. of Drum Motors,” retrieved Nov. 2008 from WWW.Interroll.COM/en/Products, via Internet.

Affiliated with

Also associated with

Rating

External-rotor motor having a stationary bearing shaft does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with External-rotor motor having a stationary bearing shaft, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and External-rotor motor having a stationary bearing shaft will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4113406