Pumps – Motor driven – Electric or magnetic motor
Reexamination Certificate
2005-08-15
2010-11-02
Kramer, Devon C (Department: 3746)
Pumps
Motor driven
Electric or magnetic motor
C417S360000, C464S029000
Reexamination Certificate
active
07824162
ABSTRACT:
A vacuum pump includes a rotor assembly mounted on a driven shaft, and a motor for rotating a drive shaft in forward and reverse directions. A drive member on the drive shaft engages a driven member on the driven shaft. Each member has first and second impact surfaces. The members are configured to permit at least one quarter of a revolution of the drive member relative to the driven member in either the forward or the reverse direction before one of the impact surfaces of the drive member impacts upon a corresponding impact surface of the driven member. This enables the drive member to acquire sufficient angular momentum before it impacts the driven member such that the amount of energy transferred to the driven shaft upon impact can be sufficient to free a pump that has become locked by process deposits.
REFERENCES:
patent: 1627964 (1927-05-01), Galloway
patent: 2793057 (1957-05-01), McGugin
patent: 3146756 (1964-09-01), Shimanckas
patent: 3150725 (1964-09-01), Hornschuch et al.
patent: 3283588 (1966-11-01), Merchant
patent: 4309152 (1982-01-01), Hagen
patent: 4661085 (1987-04-01), Carli
patent: 4767378 (1988-08-01), Obermann
patent: 5319991 (1994-06-01), Pierrat
patent: 5569022 (1996-10-01), Rossi
patent: 6095772 (2000-08-01), Ramey et al.
patent: 6265799 (2001-07-01), Uriarte
patent: 6384508 (2002-05-01), Marioni
patent: 0 474 004 (1992-03-01), None
patent: 0 723 329 (1996-07-01), None
patent: 1 372 245 (2003-12-01), None
patent: 1 398 506 (2004-03-01), None
patent: 2 177 477 (1987-01-01), None
patent: 2 264 548 (1993-09-01), None
patent: 2 341 219 (2000-03-01), None
United Kingdom Search Report of Application No. GB 0418547.6 dated Nov. 9, 2004; Claims searched: 1-12; Date of search: Nov. 8, 2004.
United Kingdom Search Report of Application No. GB 0418547.6 dated Nov. 26, 2004; Claims searched: 13-20; Date of search: Nov. 25, 2004.
PCT Notification of Transmittal of the International Search Report and the Written Opinion of the International Searching Authority, or the Declaration of International Application No. PCT/GB2005/003189; Date of mailing: Oct. 28, 2005.
PCT International Search Report of International Application No. PCT/GB2005/003189; Date of mailing of the International Search Report: Oct. 28, 2005.
PCT Written Opinion of the International Searching Authority of International Application No. PCT/GB2005/003189; Date of mailing: Oct. 28, 2005.
Bertheaud Peter J
Edwards Limited
Kramer Devon C
LandOfFree
Vacuum pump does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum pump will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4152215