Resources Contact Us Home
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
Display screen with graphical user interface
Modular connector for touch sensitive device
Novelty headband
DKK1 oncogene as therapeutic target for cancer and a diagnosing marker
Self-service administration of a database
Automated tuning in a virtual machine computing environment
(Meth)acrylic resin composition, imidized (meth)acrylic resin composition, and film obtained by molding them
  Randomly Featured Patents
Method of forming a BiCMOS SOI wafer having thin and thick SOI regions of silicon
Identification storage medium arrangement, a read apparatus and an identification system
Two piece snap-fit cap or glide
Dynamically reassigning virtual lane resources
Creation of GIS tools and spatial database for limited access highway entrance points in the US and Canada
Electrostatic chuck and method of manufacturing the same
Selectable one-way clutch
Optical fiber interconnection mechanism
Door lock
Bi-polar power supply regulator bi-polar power supply regulator