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Title:
ENGAGING APPARATUS WITH SCREW
Document Type and Number:
Japanese Patent JPS6084414
Kind Code:
A
Abstract:
According to a depicted embodiment thereof, the novel threaded engagement means comprises a drill rod coupling which is centrally bored and threaded to receive threaded drill rods. A stack of apertured discs, however, engages and lines the threaded bore. The discs intimately engage, and bridge between, the coupling and drill rod threads, and communicate torque therebetween. The coupling has a bearing surface or land upon which the discs are supported, and a retainer set in a recess formed in the coupling secures the disc stack in place.

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Inventors:
ROBAATO DABURIYU HAGUHESU
JIEIMUSU EFU KIYANTORERU
Application Number:
JP14251584A
Publication Date:
May 13, 1985
Filing Date:
July 11, 1984
Export Citation:
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Assignee:
INGERSOLL RAND CO
International Classes:
E21B17/042; F16B31/02; F16B37/12; (IPC1-7): E21B17/042; F16B31/02
Attorney, Agent or Firm:
Warren G. Simor



 
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