Resources Contact Us Home
Dual-piston acuator

Image Number 8 for United States Patent #4882979.

A fluid-powered actuator having a body with first and second end walls, with a bulkhead positioned therebetween, which is adjustably rotatable to angularly position the bulkhead relative to the body for fluid-powered operation to establish the end limits of rotation of an output shaft. The actuator has first and second piston heads disposed in the body on opposite sides of the bulkhead to define four fluid-tight chambers. In the preferred embodiment, the bulkhead is selectively clamped between two sidewall portions. A sleeve extends between and fixedly connects the piston heads together. A plurality of guide rods are fixedly attached to and extend between the piston heads and through apertures in the bulkhead in one embodiment, and between the first piston head and the bulkhead and through apertures in the first piston head in another embodiment to transmit torque to the body and through the bulkhead. An alternative embodiment has an eccentric piston sleeve projecting through a correspondingly sized and shaped aperture in the bulkhead to transmit torque. Seals are provided to prevent fluid leakage between the four fluid-tight chambers.

  Recently Added Patents
Polarized film apparatus with bands of alternating orientation
System and method for associating financial transaction data with a user's project data using a portable electronic device
Method of allocating IP address of image forming apparatus using DHCP, image forming apparatus and system of allocating IP address using DHCP
Data transfer operation completion detection circuit and semiconductor memory device provided therewith
Inducement of organogenetic tolerance for pancreatic xenotransplant
System and method for redundant array copy removal in a pointer-free language
Method and apparatus for allocating erasure coded data to disk storage
  Randomly Featured Patents
Three tube beam projection system and method
Error monitoring of partitions in a computer system using supervisor partitions
Removable synthesis column
Data communication setting control method based on subscriber identification module and portable device for supporting the same
Representing queries and determining similarity based on an ARIMA model
USB-HUB device and its control method
Frame for a stackable chair
Method and apparatus for applying flux for use in brazing aluminum material
Circuit arrangement for an X-ray generator
Dynamic flow oven cavity vent