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US 4,226,291 AGranted
Reamer stabilizer for rock drills
OwnerWilliam R. Speltsinventor
Life of this patent
Estimating the term…
Abstract
A reamer and stabilizer assembly for rock drills having a substantially cylindrical body provided with a threaded end socket for connection to a drill stem, the body having circumferentially spaced longitudinally extending recesses for receiving reaming and stabilizer rollers mounted on axles extending parallel to the axis of the body, each reamer and roller assembly being removably retained in its recess by a keeper pin which can be inserted or retracted through a keeper pin passage opening into the threaded socket and into a longitudinal passage through each axle.
Claims5
Reamer and stabilizer apparatus for rock drilling equipment comprising:
- (a) an elongated body member having a threaded socket at one end for connection to a threaded end of a drill stem,
- (b) means at the other end of the body member for connecting a drill bit thereto,
- (c) the body member having a plurality of circumferentially spaced recesses having longitudinally spaced apart end walls,
- (d) a plurality of roller units, each unit having an axle and a roller rotatably mounted thereon, and each axle having a slidable fit between the end walls of each of the recesses,
- (e) each axle having a longitudinally extending keeper pin passage opening out of the ends thereof,
- (f) bores extending between each recess wall and threaded socket aligned with the passages through the axles,
- (g) keeper pin retainer sockets opening out of the opposite end walls of the recesses aligned with the bores,
- (h) a keeper pin extendable through the threaded socket and through each axle passage and engaging an associated keeper pin socket for releasably securing the axles within the recesses,
- (i) means releasably secured to the body within the threaded socket for preventing withdrawal of the keeper pins from the respective axles.
6 more elements
Dependencies are inferred from the claim text.