Drive point locking method and apparatus
First Claim
1. An apparatus for releasably locking a drive point at the leading end of an elongated tube including a cutting shoe having an inwardly opening recess in the sidewall of the shoe, said apparatus comprising:
- a member carried by the drive point for movement therewith, said member being movable between an extended position with a portion of the member extending into the recess to lock the point to the tube, and a retracted position with the member clearing the recess and sidewall to permit relative movement between the point and the tube;
manually operable structure carried by the drive point and operably coupled with the member for moving the member between its extended and retracted positions; and
wherein said point has an elongated threaded bore, said structure including a bolt threadably engaged in the bore for longitudinal movement in the bore responsive to manual rotation of the bolt, and means carried by the bolt and engageable with the member to cause the latter to move between said extended and retracted positions in response to said longitudinal movement of the bolt.
2 Assignments
0 Petitions
Accused Products
Abstract
An assembly for locking the drive point at the forward end of an elongated sample tube includes a tapered drive point presenting a threaded chamber, a bolt having a threaded stem, a collar disposed about the stem and a locking member disposed about the stem and adapted for engaging a recess near the forward end of the tube. The bolt head may present a tool receiving slot for remotely releasing the locked drive point assembly. The bolt stem may include a recessed groove for receiving a setscrew through the drive point to ensure that the bolt does not become completely disengaged from the drive point when the point is released from the forward end of the sample tube.
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Citations
25 Claims
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1. An apparatus for releasably locking a drive point at the leading end of an elongated tube including a cutting shoe having an inwardly opening recess in the sidewall of the shoe, said apparatus comprising:
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a member carried by the drive point for movement therewith, said member being movable between an extended position with a portion of the member extending into the recess to lock the point to the tube, and a retracted position with the member clearing the recess and sidewall to permit relative movement between the point and the tube; manually operable structure carried by the drive point and operably coupled with the member for moving the member between its extended and retracted positions; and wherein said point has an elongated threaded bore, said structure including a bolt threadably engaged in the bore for longitudinal movement in the bore responsive to manual rotation of the bolt, and means carried by the bolt and engageable with the member to cause the latter to move between said extended and retracted positions in response to said longitudinal movement of the bolt. - View Dependent Claims (2)
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3. An apparatus for releasably locking a drive point at the leading end of an elongated tube including a cutting shoe having an inwardly opening recess in the sidewall of the shoe, said apparatus comprising:
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a member carried by the drive point for movement therewith, said member being movable between an extended position with a portion of the member extending into the recess to lock the point to the tube, and a retracted position with the member clearing the recess and sidewall to permit relative movement between the point and the tube; manually operable structure carried by the drive point and operably coupled with the member for moving the member between its extended and retracted positions; and wherein said member embodies a ring having a plurality of ring segments, each of said segments having a bore therethrough for disposing each of said segments eccentrically about an annular spring. - View Dependent Claims (4)
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5. An apparatus for locking a drive point at the forward end of an elongated tube, said apparatus comprising:
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a tapered drive point presenting a threaded chamber; a bolt having a stem and a head, wherein the stem includes a threaded portion adapted for engaging the threaded chamber; and a locking member adapted for being carried by the stem in a retracted position and for being disposed in an extended position wherein a portion of said member occupies a mating recess formed near the forward end of the tube. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A method for releasably locking a drive point and an elongated tube together, said method comprising:
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providing a tapered drive point presenting a threaded chamber; providing a bolt having a stem and a head, wherein the stem includes a threaded portion adapted for engaging the threaded chamber; engaging the threaded portion of the stem with the threaded chamber, wherein a locking member is disposed about the stem intermediate the drive point and the bolt head; receiving the drive point into the tube; and advancing the bolt into the threaded chamber until the locking member is extended into a mating recess near the front end of the tube. - View Dependent Claims (22, 23, 24, 25)
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Specification