Electrical generator or motor structure – Dynamoelectric – Rotary
Reexamination Certificate
2007-09-04
2007-09-04
Lam, Thanh (Department: 2834)
Electrical generator or motor structure
Dynamoelectric
Rotary
C310S054000, C310S089000, C417S423600, C415S180000
Reexamination Certificate
active
11285667
ABSTRACT:
A high-speed universal motor running at over 10,000 or even over 20,000 rpm includes a non-rubbing water repellent sleeve that protects the bearings from moisture damage. Rather than having a sliding contact seal that can quickly wear out under such high speeds, the sleeve is made of material having a low solid surface energy so that the seal material itself repels waters on its own. TEFLON is the preferred material, which is relatively soft, so to prevent the compressibility of the seal from affecting the axial positioning of parts on the motor shaft, the seal is installed such that the seal does not contribute to the critically precise positioning of the shaft and the parts mounted to it. In some embodiments, for example, the relatively soft seal simply overlies a much stiffer, accurately machined metal spacer.
REFERENCES:
patent: 2829286 (1958-04-01), Britz
patent: 3060335 (1962-10-01), Greenwald
patent: 3371613 (1968-03-01), Dahlgren et al.
patent: 3443519 (1969-05-01), White
patent: 3525001 (1970-08-01), Erickson
patent: 3653785 (1972-04-01), Dahlgren et al.
patent: 3932070 (1976-01-01), Porter et al.
patent: 4347442 (1982-08-01), White et al.
patent: 4838763 (1989-06-01), Kramer et al.
patent: 4890988 (1990-01-01), Kramer et al.
patent: 5616973 (1997-04-01), Khazanov et al.
patent: 5661356 (1997-08-01), Fisher et al.
patent: 5704717 (1998-01-01), Cochimin
patent: 6247702 (2001-06-01), Long et al.
patent: 6379127 (2002-04-01), Andrews et al.
Lavasser Leonard J.
Mancl Dennis J.
Harter Robert J.
Lam Thanh
LandOfFree
Water repellent motor sleeve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Water repellent motor sleeve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Water repellent motor sleeve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3777887