MARK HOLUM
Architects in Anchorage, AK
License number
Alaska AELC5734
Issued Date
Mar 21, 1983
Effective Date
Dec 23, 2015
Expiration Date
Dec 31, 2017
Category
Architects, Engineers and Land Surveyors
Address
Address
PO Box 111932, Anchorage, AK 99511
Personal information
See more information about MARK HOLUM at radaris.comName
Address
Phone
205 E Dimond Blvd #184, Anchorage, AK 99515
450 E 56Th Ave #3 A, Anchorage, AK 99518
205 E Dimond Blvd #184, Anchorage, AK 99515
18732 Guillemot Cir, Anchorage, AK 99516
14201 Hancock Dr, Anchorage, AK 99515
Professional information
See more information about MARK HOLUM at trustoria.com
Manager At Cae
Manager At Cae
Position:
Manager at CAE
Location:
Anchorage, Alaska Area
Industry:
Civil Engineering
Work:
CAE
-
Manager
Manager At Criterium Alaska Engineers
Manager At Criterium Alaska Engineers
Location:
Anchorage, Alaska Area
Industry:
Civil Engineering
Piezoelectric Motor
Piezoelectric Motor
US Patent:
4755705, Jul 5, 1988
Filed:
Jun 15, 1987
Appl. No.:
7/061480
Inventors:
Mark J. Holum - Anchorage AK
International Classification:
H01L 4108
US Classification:
310328
Abstract:
a piezoelectric motor providing either continuous or incremental angular rotary motion of one or two shafts. In a first embodiment, the piezoelectric motor includes two disks (16, 18) mounted onto rotatable shafts (12, 14). A plurality of piezoelectric elements (32) are disposed in a plurality of radially aligned slots (33) around the circumferential edge of one of the disks. A rotary switch assembly (20) is operative to energize a selected piezoelectric element (38) causing it to radially expand, thereby forcing each of the disks to rotate in opposite directions. In a second embodiment, both of the disks include the piezoelectric elements around their circumferential edge. In a third embodiment, piezoelectric plates (68) are stacked circumferentially in slots (66) around the circumferential edge (70) of one of the disks and are selectively actuated so that the center of the selected piezoelectric element is caused to bow radially outward, causing the two disks to rotate in opposite directions. In a fourth embodiment, actuation of the selected piezoelectric element causes a crankarm (86) to turn as a thrust disk (88) rotates about the circumferential edge of a fixed driver disk (82).