Resources Contact Us Home
Hydraulic actuator and lift apparatus

Image Number 4 for United States Patent #4900187.

An elongated operating cylinder has an internal piston assembly including axially spaced diametral disks. Such assembly is movable lengthwise in the internal cavity of the cylinder. A flexible force-transmitting component is connected to the piston assembly and extends axially of the cylinder through one of its ends. Introduction of fluid under pressure into the cylinder cavity tends to move the piston assembly axially so as to apply a pulling force to the flexible force-transmitting component, adapting the cylinder for use as a fluid-pressure actuator. Such fluid pressure actuator is particularly suited for use in lift apparatus where a compact, stationary frame has upright rails along which a lift carriage is movable. The lifting force preferably is provided by the flexible force-transmitting component of the actuator which can be routed by one or more pulleys. The lift apparatus can be mounted adjacent to a dock for lifting a small watercraft from the water.

  Recently Added Patents
Electrical conduit containing a fire-resisting thermoplastic composition
Active constant power supply apparatus
Multi-dimensional tuple support in rule engines
Methods and systems to accomplish variable width data input
Information recording medium and information processing method for accessing content with license or copyright protection
Managing delivery of application server content
Advertising system and method
  Randomly Featured Patents
Space efficient multi-sheet buffer module and modular printing system
Single note sostenuto for the upright piano
Anterior capsular punch with deformable cutting member
Fluid delivery device
Piston flush valve
Adjustable rotary locking and unlocking device
Sheet folding method, sheet folding apparatus, sheet finisher equipped therewith and image forming apparatus for used with the sheet finisher
Charge transfer semiconductor device
Vacuum pump apparatus having peltier elements for cooling the motor & bearing housing and heating the outer housing
Communication apparatus comprising two units and means for supporting one unit on the other