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US 6,210,415 B1Granted
Surgical drill guide
AssigneeLab Engineering & Manufacturing, Inc.
InventorLeon W. Bester
Life of this patent
Estimating the term…
Abstract
A surgical drill guide for directing a guide tube toward a target. The guide tube has first and second sets of teeth extending along an exterior surface thereof. A through passage in an operating mechanism housing receives the guide tube. A first actuator or guide tube advancing mechanism uses a ratchet and pawl mechanism to advance the guide tube distally. A guide tube locking mechanism, that includes another ratchet and pawl mechanism prevents any unwanted proximal motion by providing a releasable lock against any unwanted proximal motion of the guide tube during use.
Claims20
A surgical drill guide comprising:
- A) a body having a base portion with a passage extending therethrough along a body axis, a grip extending from said base portion and a probe extending to a free end spaced distally of said base portion and positioned on the body axis,
- B) a guide tube adapted for being moved through said body passage along the body axis with first and second sets of ratchet teeth formed on angularly displaced faces of said guide tube,
- C) a guide tube advance mechanism with a handle pivoted from said body and a portion for engaging the first set of ratchet teeth thereby to advance said guide tube along the body axis toward the free end of said probe, and
- D) a guide tube locking mechanism with a lever pivoted in said body and biased to a first position wherein said lever engages the second set of ratchet teeth for preventing any motion of said guide tube away from said free end of said probe, said lever disengaging from said second set of ratchet teeth in a second position thereby to enable the movement of said guide tube away from the free end of said probe.
1 more element
A surgical drill guide comprising:
- A) a guide tube having a central axially extending passage therethrough,
- B) a body having a base portion with a passage extending therethrough along an axis for receiving said guide tube, a grip extending obliquely from said base portion and a probe extending obliquely to a free end positioned on the axis spaced distally of said base portion,
- C) a guide tube advance mechanism including a first set of ratchet teeth formed on the exterior of and along a portion of the length of said guide tube and a handle pivoted from said body with a first pawl for engaging said first set of ratchet teeth in a first position whereby actuation of said guide tube advance mechanism moves said guide tube distally for an incremental distance, said pawl being spaced from said first set of ratchet teeth in a second position, and
- D) a guide tube locking mechanism including a second set of ratchet teeth formed on the exterior of and along a portion of the length of said guide tube and a lever with a second pawl pivoted in said body and biased to a first position whereby said second pawl engages a tooth in said second set of ratchet teeth thereby to prevent any motion of said guide tube away from said arm, said lever disengaging said second pawl from said second set of ratchet teeth in a second position thereby to enable the movement of said guide tube away from the free end of said arm.
1 more element
A surgical drill guide comprising:
- A) a guide tube having a central axially extending passage therethrough;
- B) a body having a base portion with an axially extending passage, a grip extending obliquely from said base portion and a probe extending obliquely to a free end positioned on the axis and spaced distally of said base portion;
- C) a guide tube advance mechanism including:
- i) a first set of ratchet teeth formed on the exterior of and along a portion of the length of said guide tube,
- ii) a handle pivoted from said body with a first pawl for engaging said first set of ratchet teeth in a first position whereby actuation of said guide tube advance mechanism moves said guide tube distally for an incremental distance, said pawl being spaced from said first set of ratchet teeth in a second position,
- iii) a cylinder mounted for axial displacement in said body,
- iv) a spring intermediate the distal end of said cylinder and the closed cavity end,
- v) a yoke at the proximal end of said cylinder, and
- vi) a pivot mounted to said yoke for carrying said handle;
- and
- D) a guide tube locking mechanism including:
- i) a second set of ratchet teeth formed on the exterior of and along a portion of the length of said guide tube,
- ii) a lever with a second pawl pivoted in said body and biased to a first position whereby said second pawl engages a tooth in said second set of ratchet teeth thereby to prevent any motion of said guide tube away from said arm, said lever disengaging said second pawl from said second set of ratchet teeth in a second position thereby to enable the movement of said guide tube away from the free end of said arm,
- iii) an axially extending cavity formed in said body having an opening at its proximal end into said body passage and said guide tube locking mechanism,
- iv) a pivot pin mounted in said body through said cavity, said pivot pin passing through a central pivot passage at the center of said lever, and
- v) a lever spring mounted between the distal ends of said lever and said cavity.
13 more elements
Dependencies are inferred from the claim text.