Bryant D Lund
Land Surveyors in Salt Lake City, UT
License number
Utah 119448-9925
Issued Date
May 25, 1965
Expiration Date
Dec 31, 1999
Category
Engineer/Land Surveyor
Type
Engineer in Training - Obsolete
Address
Address
Salt Lake City, UT
Personal information
See more information about Bryant D Lund at radaris.comName
Address
Phone
530 E 100 S, Manti, UT 84642
9743 Rosewood Ct, South Jordan, UT 84095
498 100 S, Manti, UT 84642
498 100 E, Manti, UT 84642
Professional information
Stepper Motor Valve Actuator Control Apparatus
US Patent:
4084120, Apr 11, 1978
Filed:
Jun 16, 1976
Appl. No.:
5/696602
Inventors:
Bryant D. Lund - Salt Lake City UT
Assignee:
E-Systems, Inc. - Dallas TX
International Classification:
G05B 1128
US Classification:
318599
Abstract:
An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A control circuit is responsive to pulsed drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. The control circuit includes a switching device which applies a DC voltage to the motor windings to hold the valve position when it is not being driven.
Limit Control Apparatus
US Patent:
4097786, Jun 27, 1978
Filed:
Jun 16, 1976
Appl. No.:
5/696601
Inventors:
Bryant D. Lund - Salt Lake City UT
Assignee:
E-Systems, Inc. - Dallas TX
International Classification:
F16K 3102
US Classification:
318282
Abstract:
An actuator control system includes a ballscrew type actuator for controlling the positioning of a valve device. A processing circuit is responsive to direction and drive signals for driving a synchronous stepper motor which is operatively coupled to the actuator. The processing circuit includes a switching device which applies a DC voltage to the motor windings to hold the valve position when it is not being driven. A limit sensing device provides a limit signal when the movable member of the actuator approaches a limit of travel. A limit control circuit responds to the limit signal to alternately reverse the direction signal applied to the processing circuit so long as that signal is representative of the direction in which the limit is being approached.