Bit retainer system

Details Bit retainer system Bit retainer system

2007-09-11

2007-09-11

Bagnell, David (Department: 3672)

Boring or penetrating the earth

With tool shaft detail

Shaft carried guide or protector

C175S325100, C175S320000, C175S294000

Reexamination Certificate

active

10984019

ABSTRACT:
A bit retainer system comprising a casing, a driver sub adapted to be disposed around a shank of a bit, and a bit retainer. The driver sub comprises a threaded connector, a threaded pin end configured to engage with the hammer case, and a stop. The bit retainer comprises a load carrying threaded connector configured to engage with the threaded connector of the driver sub, and a catch thread configured to retain the head of a bit to the system.

REFERENCES:
patent: 5065827 (1991-11-01), Meyers et al.
patent: 6070678 (2000-06-01), Pascale
patent: 6827162 (2004-12-01), Fisher
patent: 7117939 (2006-10-01), Hawley et al.

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