Valves and valve actuation – Electrically actuated valve – Remote or follow-up control system for electrical actuator
Patent
1981-05-28
1984-01-31
Michalsky, Gerald A.
Valves and valve actuation
Electrically actuated valve
Remote or follow-up control system for electrical actuator
13762565, 251337, F15B 13044, F16K 3104
Patent
active
044285590
ABSTRACT:
A direct drive type servo motor in which a spool is driven directly by a force motor, the force of the force motor being balanced by the reactional force generated by a resilient member to stabilize the position of the spool to control the flow of working fluid. The resilient member is constituted by a metallic cylindrical member having holes formed in the outer peripheral surface thereof. The holes are arranged such that, when the force is applied to the cylindrical member in the axial direction, the cylindrical member produces an axial reactional force. In consequence, the generation of force component which would act to press the spool against the sleeve is avoided to reduce the friction between the spool and the sleeve to permit a smooth movement of the spool, while allowing the resilient member to have a high spring constant to improve the response characteristic of the servo valve.
REFERENCES:
patent: 3749128 (1973-07-01), Sallberg et al.
Akasaka Yoshimichi
Ichiryu Ken
Nakamura Ichiro
Watanabe Haruo
Beall, Jr. Thomas E.
Hitachi , Ltd.
Michalsky Gerald A.
LandOfFree
Direct drive type servo valve does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Direct drive type servo valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Direct drive type servo valve will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2342536