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
Luggage cart
Method and system of channel detecting and reporting, terminal, and management center
Delay interferometer using magneto-optic effect of a variable faraday rotator
Voltage detection apparatus and combination circuit
System and method of supplying an electrical system with direct current
Method of fabricating CIGS by selenization at high temperature
Vehicle running control system
  Randomly Featured Patents
1-Substituted amino-2-alkyl-5-hydroxy-7,8-cyclopentano[h]-1,2,3,4-tetrahydroisoquinoli nes
Fluorinated elastomeric gas diffuser membrane
Ski boot
Removal of volatile contaminants from the vadose zone of contaminated ground
Mold assembly using inserts
Expansible and retractable vehicle body
Data head load beam for height compacted, low power fixed head and disk assembly
Method for forming a hardened cement in a bone cavity
Magnetic head with an improved inner core
Electromagnetically reciprocating apparatus with adjustable bounce chamber