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
Automatically selecting a paper with increased dimensions than originally desired for printing and adding advertisement content to the increased dimensional area of the paper
Transmitter and receiver for streaming media including packet padding
Animation control apparatus, animation control method, and non-transitory computer readable recording medium
Porous polymeric resins
Method for forming ventilation holes in an electrode plate
Housekeeping cart
Metal halide lamps with fast run-up and methods of operating the same
  Randomly Featured Patents
External resonator type semiconductor laser apparatus
Apparatus for measuring the center-to-center distance between point wires of print solenoids
Display device capable of mode detection and automatic centering
Impeller for dispersing gas into molten metal
Water-leakage detecting apparatus and method which are little influenced by noise
Lens measuring instrument
Injection moulding process and apparatus
X-ray intensifying screen permitting an improved relationship of imaging speed to sharpness
System and method for processing requests from newly registered remote application consumers
Sprocket for roller chain drives