DAVID MICHAEL PERRY, O.D.
Optometry at Washington Sq, Saint Paul, MN
License number
Minnesota 1932
Category
Optometry
Type
Optometrist
Address
Address
4750 Washington Sq, Saint Paul, MN 55110
Phone
(651) 429-3379
(651) 429-8681 (Fax)
(651) 429-8681 (Fax)
Personal information
See more information about DAVID MICHAEL PERRY at radaris.comName
Address
Phone
447 E Sheridan St, Ely, MN 55731
14177 Avalon Path, Rosemount, MN 55068
16076 Foliage Ave W, Rosemount, MN 55044
Professional information
See more information about DAVID MICHAEL PERRY at trustoria.com
David M Perry, White Bear Lake MN - OD (Doctor of Optometry)
David M Perry, White Bear Lake MN - OD (Doctor of Optometry)
Specialties:
Optometry
Address:
4750 Washington Sq, White Bear Lake 55110
(651) 429-3379 (Phone), (651) 429-8681 (Fax)
(651) 429-3379 (Phone), (651) 429-8681 (Fax)
Languages:
English
David Michael Perry, White Bear Lake MN
David Michael Perry, White Bear Lake MN
Specialties:
Optometrist
Address:
4750 Washington Sq, White Bear Lake, MN 55110
Recording Disk Centering Hub
Recording Disk Centering Hub
US Patent:
4843512, Jun 27, 1989
Filed:
Aug 28, 1987
Appl. No.:
7/090547
Inventors:
Larry D. Moore - Weatherford OK
Vurnen J. Leonard - Minneapolis MN
David M. Perry - Moundsview MN
Vurnen J. Leonard - Minneapolis MN
David M. Perry - Moundsview MN
Assignee:
Minnesota Mining and Manufacturing Company - St. Paul MN
International Classification:
G11B 2303
US Classification:
360133
Abstract:
Recording medium disk-hub combination wherein the hub has a central hole whose periphery is bounded at least partly by three flexure members which circumscribe a cylinder corresponding to a disk drive spindle. The three flexure members are arranged in a triangular configuration, and the parts of such flexure members that circumscribe the cylinder are coplanar, forming a flexure member plane of contact. The axial center line of the recording medium disk is spaced from the flexure member plane of contact by no more than three times the thickness of the disk itself. The combination is preferably designed with the ratio of the coefficient of thermal expansion of the hub to that of the recording medium disk being between 0. 7 and 1. 4. Hub is made magnetic, e. g. , by attaching a magnetizable disk.