Patent · US Active

Valve actuators

US8118276B2 · kind B2 · utility

187Cited by

21References

15Claims

0Family size

Assignee

ROTORK CONTROLS LIMITED · GB

Inventors

Peter Sanders · Bath, GB
Hemendra Parakrama Bandara Dassanayake · Romford, GB
Andrew Withers · Bristol, GB

Key dates

Filing date	Jul 9, 2007
Grant date	Feb 21, 2012
Priority date	—
Expiry date	Jan 13, 2029

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T137/8242
WIPO fieldControl
WIPO sectorInstruments

Abstract

A valve actuator having an electric drive motor with a motor shaft and having an output shaft linked to the motor shaft to drive movement of a valve, the actuator further having a control system arranged to provide a first closed loop control of the actuator output shaft and including a controller coupled to a first position sensor to sense the position of the actuator output shaft, and to a second position sensor to sense the position of the motor shaft and to enable determination of the speed of the motor shaft, the control system being configured to respond to sensed signals from the first and second sensors and adjust the motor speed/position accordingly.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.