Bit leg outer surface hardfacing on earth-boring bit

Details Bit leg outer surface hardfacing on earth-boring bit Bit leg outer surface hardfacing on earth-boring bit

2007-02-22

2009-02-03

Neuder, William P (Department: 3672)

Boring or penetrating the earth

Bit or bit element

Rolling cutter bit or rolling cutter bit element

C175S425000

Reexamination Certificate

active

07484577

ABSTRACT:
An earth-boring bit has bit legs having hardfacing covering the majority of the outer surface. The hardfacing may have gaps at an area surrounding the ball plug and an area around a fixture dimple. The hardfacing may be multi-layer, with the layers differing in composition. Recesses may be located at the leading and trailing edges of the supporting metal so as to provide a thicker area of hardfacing at these corners. The supporting metal of the outer surface of the bit leg may also have an upper cylindrical section and a lower tapered section. The hardfacing has a constant outer diameter but will taper in thickness in the lower tapered section. The thickness of the hardfacing may also vary in a circumferential direction with a greater thickness over at least one of the corners.

REFERENCES:
patent: 3158214 (1964-11-01), Wisler et al.
patent: 5791423 (1998-08-01), Overstreet et al.
patent: 6360832 (2002-03-01), Overstreet et al.
patent: 7182162 (2007-02-01), Beuershausen et al.
patent: 2005/0252691 (2005-11-01), Bramlett et al.
patent: WO 99/39075 (1999-08-01), None

Affiliated with

Also associated with

Rating

Bit leg outer surface hardfacing on earth-boring bit does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Bit leg outer surface hardfacing on earth-boring bit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bit leg outer surface hardfacing on earth-boring bit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4104898