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
Attribute based hierarchy management for estimation and forecasting
System for the production and harvesting of algae
Sports pitch rainwater harvesting systems suitable for use in developing countries
Method for producing fulvic acid
Spliced optical cable assembly
Lightweight robust thin flexible polymer coated glove
Signal transmitter device comprising an electrical acoustic signal transmitter
  Randomly Featured Patents
Valve assemblies
System for feeding solid materials to a pressurized pipeline
Lighting apparatus having asymmetric light intensity distribution of compensating for low contrast ratios of LCD panel
Method for resetting a central lock system of a motor vehicle with a remote actuating device
Drilling tool with a suction device
Image forming apparatus
Alignment clamp
Promoters of the genes glutamate dehydrogenase .beta.-N-acetylhexosaminidase and .gamma.-actin and their use in filamentous fungi expression, secretion and antisense systems
Tracking method for memory apparatus
Method of forming ohmic conductive components in a single chamber process