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
Television with a stand
Ranging method and apparatus in passive optical network
Method and system for distributing ringback files
Print system
Smart television system having methods or means for accessing paid or subscribed digital content from the internet
Method and apparatus for soft information transfer between constituent processor circuits in a soft-value processing apparatus
Soliciting first party in communication session to maintain call when degradation of connection to second party is anticipated
  Randomly Featured Patents
Method of preparing delta-9-tetrahydrocannabinol
Apparatus for cocurrent fractional distillation
Shoe upper
Nutritional weight loss agent and method
Front of a picture frame
Systems and methods for supplying power to a vehicle trailer
Versatile decorative object, named the Paired Image Print, having a unique visual effect and a method of making said versatile decorative object
Image processing method and apparatus, and recording medium used therewith
Sentence displaying apparatus with sentence section
Expandable coupling