Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Browse by Category: Main > Engineering
Class Information
Number: 405/302
Name: Hydraulic and earth engineering > Earth treatment or control > Shoring, bracing, or cave-in prevention > Roof support > Jack > Mobile > Control system
Description: Method or apparatus for supply of motive energy to the prop via a regulating circuit to actuate the prop.










Patents under this class:
1 2 3

Patent Number Title Of Patent Date Issued
4109472 Longwall mining apparatus Aug. 29, 1978
4091627 System and equipment for operating self-advancing supports May. 30, 1978
4089182 Equipment for remotely operating self-advancing supports used at the pit face in a coal mine May. 16, 1978
4050256 Mine roof support control systems Sep. 27, 1977

1 2 3










 
 
  Recently Added Patents
System and method of improving audio signals for the hearing impaired
Methods and compositions related to glucocorticoid receptor antagonists and breast cancer
Method and system for providing an intelligent visual scrollbar position indicator
Graphical planner
System and method for secure power systems infrastructure communications
Systems and methods for implementing multi-application tabs and tab sets
Imaging device
  Randomly Featured Patents
Magnetic read/write head substrate
Column analyzer system and improved chromatograph column for use in the system
Shielded cable termination assembly
Color matching system and method
Semiconductor memory device having two or more memory blocks
Electrolyte flow configuration for a metal-halogen flow battery
Solar displacement pump
Densification of fibrous structures by resin transfer moulding for making thick parts of composite material
Integrated half coil structure for write assist of high coercivity media
Slaved tube length control for hairpin bender