US 10,890,039 B2
Deck bushing system for drilling machines
Fernando Gonzalez, Sherman, TX (US)
Assigned to Caterpillar Global Mining Equipment LLC, Denison, TX (US)
Filed by Caterpillar Global Mining Equipment LLC, Denison, TX (US)
Filed on Oct. 12, 2018, as Appl. No. 16/158,758.
Prior Publication US 2020/0115973 A1, Apr. 16, 2020
Int. Cl. E21B 19/24 (2006.01); E21B 17/10 (2006.01); F16C 23/02 (2006.01)
CPC E21B 19/24 (2013.01) [E21B 17/1007 (2013.01); F16C 23/02 (2013.01); E21B 17/1085 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A deck bushing system for a drilling machine having a mast deck including a deck hole, comprising:
a deck bushing sized to be received in the deck hole, the deck bushing including a tubular member having a generally square shaped flange; and
a deck bushing housing fixedly secured to the mast deck, the deck bushing housing forming a generally V-shape opening toward the deck hole,
wherein the tubular member is an outer tubular member, and the deck bushing further includes an inner tubular member rotatable relative to the outer tubular member.