Resources Contact Us Home
Hydraulic shield support

Image Number 5 for United States Patent #7237983.

A hydraulic shield support is disclosed with at least two adjustable-length hydraulic props supporting a dedicated shield, which are connected through a control bank to a hydraulic fluid supply and borne on base shoes, and to which a pressure in excess of the pressure of the hydraulic fluid may be applied in the set condition of the shield support. In order to provide almost any pressure level at each shield support at a deep face in a simple way, the shield support has at least one pressure intensifier located in a hydraulic pipe system between the hydraulic fluid supply and the hydraulic props, with an oscillating intensifier piston in the form a differential piston effecting the increase in pressure. The low pressure inlet of the pressure intensifier is connected to the setting pressure pipes upstream, and its high-pressure outlet downstream, of a hydraulically-releasable non-return valve.

  Recently Added Patents
Device and method for superimposing patterns on images in real time, particularly for guidance by location
Adaptive block pre-fetching method and system
Blow moulding machine with compressed air recycling
Traffic signal mapping and detection
Semiconductor arrangement with a solder resist layer
Rotating-body electrification mechanism, image carrier unit, process cartridge, image forming apparatus, and method for electrifying image carrier unit
  Randomly Featured Patents
Laser processing method to a class substrate and an optical diffraction element obtained thereby, and a method for manufacturing optical elements
High discharge capacity electrolytic manganese dioxide and methods of producing the same
Compositions and methods for treating viral infections
Apparatus for creating in-line index prints
Method of making a gallium nitride light-emitting diode
Extrusion process for forming chemically stable drug multiparticulates
Internal combustion engines
Methods of using a vaccine composition containing synthetic adjuvant
Invisible light beam projector and night vision system
Forms of aurothiomalate having therapeutic advantage