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
Heterocyclic compounds as CCR2B antagonists
Video-recording reservation management apparatus, method, program, and system
Tap initialization of equalizer based on estimated channel impulse response
Communication terminal, communication system, server apparatus, and communication connecting method
Systems, computer programs, and methods for controlling costs of a healthcare practice
Method and system for providing an intelligent visual scrollbar position indicator
Cable preparation tool
  Randomly Featured Patents
Demodulator and communication device using the same
Lamp housing
Fault protection using microprocessor power up reset
Water filtration system for control of the zebra mussel
Silencer for magnetic field gradient coils in a magnetic resonance imaging apparatus
Prostheses for curved lumens
Composition for defoliation of plants
Method for producing protein containing nonprotein amino acids
Disc recorder combined with radio receiver and disc player
Cap spinning device