Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and a device for deep hole drilling










Image Number 2 for United States Patent #4889194.

A device for drilling deep holes in the ground has at least two axial drill bits and an equal number of plates each having three shafts axially interconnecting the plates. Two of the shafts are rigidly attached to both plates and the third shaft is pivotably attached to both plates. The two rigid shafts are separable from the upper plate by pulling a locking pin separating a telescopic head of each shaft from the plate. At the separation, the shafts are telescopically shortened by springs and the drilling liquid is automatically shut off to the worn-out drill bit and opened to the new drill bit. The remaining third shaft eccentrically interconnects the plates, whereby the lower worn-out drill bit, at rotation, wears a semicircular evacuation pocket in the wall of the hole. The third shaft is successively pivoted outwards until it forms an angle of e.g. 80.degree. with the axis of the hole. An axle pin having rectangular cross-section retains the upper end of the third shaft via a sleeve with a slit. The slit has such a dimension that the narrowest cross-section of the axle pin can pass through the slit at said angle for releasing the third shaft from the second plate for placing the worn-out drill bit with three legs and plate in the evacuation pocket thus formed.








 
 
  Recently Added Patents
Flexure with insulating layer isolating a portion of a metal substrate
Additives for oil recovery from reservoirs
Electric connection box
Bundled flexible cable with water resistant structure
Method and devices for handling access privileges
Attribute information providing system
Method and system for distributing load by redirecting traffic
  Randomly Featured Patents
Secure instant messaging system
Adapter for enabling connection of vintage oil fuse cutouts and the like with modern cable lead connector systems
Terminally-substituted polymeric compositions from cationically polymerizable monomers and initiators
Back-up battery for a cellular telephone
Apparatus and method for routing communications between networks and devices
Apparatus for manufacturing resonant tag
Adapter housing
Mountable syntactic foam sensor housing
Laboratory flask support
Hands-free fishing system