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
Nano-pigment inkjet ink composition that has a low odor and is environmentally-friendly
High-density fiber optic modules and module housings and related equipment
Washing machine
Method and systems for detecting duplicate travel path
Semiconductor device
Bi-directional pattern dependent noise prediction
  Randomly Featured Patents
Reflective optical systems for EUV lithography
Spark gap unit for lithotripsy
Methods for measuring iris color over time
Promoting websites based on location
Television ghost detection and cancellation system controlled over several lines of a vertical retrace interval
Method for determining particle size distribution and mechanical properties of soft particles in liquids
Method and apparatus for determining clearance between moving and static members in a machine
Process for producing physiologically active substance by multienzyme process
Real time signal recording apparatus for effecting variable signal transfer rate
Lightning protection system for composite material aircraft structures