Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Valve actuator differential worm planetary gear drive










Image Number 3 for United States Patent #4896562.

A valve actuator differential worm planetary gear drive provides forward or reverse motion to a valve stem, from an input from either a motor-driven worm or a handwheel driven worm, by using a plurality of planet gears to send motion to the sun gear. If the preference is to have the motor driven the valve primarily, the manual worm stays locked and the motor worm acts as a planetary arm. When it is desired to move the valve by hand, the motor gear is fixed and rotation of the handwheel worm gear transmits the power through the ring gear and the planet gears to the drive sleeve.








 
 
  Recently Added Patents
Clothes hanger
Printed circuit board unit having routing unit mounted thereon and computer device having the same
Flash drive
Tranverse in-core probe monitoring and calibration device for nuclear power plants, and method thereof
Lubricating oil compositions
Tab visibility
Vehicle running control system
  Randomly Featured Patents
Label issuing apparatus
Exercise device
System and method for optimizing camera settings
Process for the preparation of 2-alkylthio benzoic acid derivatives
Apparatus for directly making liquid pig-iron from coarse iron ore
Composite beam
Impact modified polyphenylene sulfide
Hydroxamic acid derivatives as metalloproteinase inhibitors
Rubber boat
Method for producing a microfluidic system