Reamer With Replaceable Rolling Cutters
AssigneeThe Charles Machine Works, Inc.
InventorFloyd R. Gunsaulis
Life of this patent
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Abstract
A reamer for use in underground drilling back-reaming operations. The reamer comprises a body comprising a plurality of pockets. The pockets are configured such that an arm, a rolling cutter, and a retainer may fit within each of the pockets. Each of the rolling cutters is connected to each of the arms via a spindle. The rolling cutters are held on the spindle and connected to each of the pockets via a retainer. Each of the arms is secured to each of the pockets via a plurality of fasteners. A mechanical lock is used to secure at least one of the fasteners in place. Each of the arms comprises a grease passage and a pressure compensation system. The rolling cutters are replaceable with rolling cutters of like size or rolling cutters of different sizes and shapes.
Claims23
A rotatable cutter assembly for use with a reamer comprising:
- an arm having a first end, a second end, and a grease passage;
- a spindle attached to the first end of the arm;
- a rotatable cutter having a sleeve positioned within its interior, in which the rotatable cutter and the sleeve are disposed around the spindle;
- a retainer to secure the rotatable cutter on the spindle;
- and
- a passage formed in the second end of the arm for housing a fastener that is parallel to the spindle.
A backreamer comprising:
- an enlarged body having at least one recessed pocket formed therein, the at least one pocket bounded in part by offset first and second surfaces that are positioned at an angle to a centerline of the body;
- wherein the first surface is planar and terminates at an edge of the body and has a first bore formed therein, and the second surface has at least one second bore formed therein;
- and
- wherein the first and second bores extend in a parallel relationship.
Dependencies are inferred from the claim text.