Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Lateral hole boring method and apparatus










Image Number 14 for United States Patent #4691788.

A lateral hole boring method whereby a lateral hole of a desired length is formed underground by repeatedly performing the following steps. A vertical hole is prepared, and a lateral hole boring apparatus equipped with a leading auger of a smaller length than the diameter of the vertical hole is lowered into the vertical hole to a predetermined position. The apparatus is manipulated from the ground level to advance and rotate the leading auger to bore a lateral hole. When the lateral hole has reached a predetermined length commensurate with the length of the leading auger, the advance movement of the leading auger is stopped, and the lateral hole boring apparatus is manipulated from the ground level to detach the leading auger therefrom, and is lifted above the vertical hole while leaving the leading auger in the lateral hole. A coupling auger of a smaller length than the diameter of the vertical hole is attached to the lateral hole boring apparatus outside the vertical hole, and the apparatus is lowered into the vertical hole again. Then, the lateral hole boring apparatus is manipulated from the ground level to couple the coupling auger to the leading auger left behind in the lateral hole.








 
 
  Recently Added Patents
Weight-balanced polygonal mirror, light scanning unit using the polygonal mirror, and image forming apparatus
Integrated advance copper fuse combined with ESD/over-voltage/reverse polarity protection
Electronic component mounting machine and operating instruction method for the same
Image capture apparatus and program
Organic light-emitting display and method of manufacturing the same
Tri-material dual-species neutron spectrometer
Particles with high surface charge for crystalline colloidal arrays
  Randomly Featured Patents
Process for preparing poly(1,4-benzamide) in cyclic sulfone media
Storage device
Flexible riser and method for pulling-in and hanging up thereof
Centrifugal separator having a device for the transformation of kinetic energy to pressure energy
Three-wheeled motor vehicle
Range measuring method, range measuring apparatus, non-contacted IC medium and range measuring system
Process insensitive delay line
Utility bar with bowed shank
Indicating circuit for indicating network status
Method and apparatus for preparing false twisted yarns