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US 10,591,032 B2Granted
Split nut drive
AssigneeIntuitive Surgical Operations, Inc.
InventorMatthew A. Wixey
Life of this patent
Estimating the term…
Abstract
A medical device drive system including a lever body having portions defining a lever body cavity, a nut housing in the lever body cavity, and a first nut at least partially in the first nut cavity. The first nut is slideable in the first nut cavity between an engaged position in which the lead screw interface is engaged with the engagement portion of the lead screw, and a disengaged position in which the lead screw interface is not engaged with the engagement portion of the lead screw. The lead screw interface of the first nut is selectively engageable with the engagement portion of the lead screw by sliding the lever body and pin relative to the first nut housing.
Claims19
A medical device drive system comprising:
- a lever body including portions defining a lever body cavity;
- a lead screw extending through the lever body cavity, the lead screw having a proximal end, a distal end, and an engagement portion between the proximal end and the distal end, the proximal end and distal end defining a lead screw axis extending from the proximal end to the distal end;
- a first nut housing having a first nut cavity;
- the first nut housing being at least partially in the lever body cavity and being slidable in the lever body cavity along the lead screw axis;
- a first nut at least partially in the first nut cavity, the first nut having a first slot, and a lead screw interface sized and shaped to engage with the engagement portion of the lead screw, the first nut being slidable in the first nut cavity between an engaged position in which the lead screw interface is engaged with the engagement portion of the lead screw, and a disengaged position in which the lead screw interface is not engaged with the engagement portion of the lead screw;
- and
- a pin coupled to the lever body, the pin being slidable in the first slot of the first nut;
- wherein the lead screw interface of the first nut is selectively engageable with the engagement portion of the lead screw by sliding the lever body and the pin relative to the first nut housing along the lead screw axis.
5 more elements
A medical device comprising:
- a lead screw having a proximal end, a distal end, and a lead screw engagement portion between the proximal end and the distal end, the proximal end and distal end defining a lead screw axis extending from the proximal end to the distal end;
- a lever body, wherein the lever body includes portions defining a lever body cavity having a proximal end, a distal end, and a lever body axis defined between the proximal end and the distal end;
- a first nut having a first nut engagement portion sized and shaped to engage with the lead screw engagement portion, the first nut being slidably coupled to the lever body;
- a second nut having a second nut engagement portion sized and shaped to engage with the lead screw engagement portion, the second nut being slidably coupled to the lever body,
- the first nut and second nut being slidable toward and away from the lead screw axis;
- and;
- one or more drive portions coupled to the lever body, the one or more drive portions having one or more drive surfaces in contact with the first nut and the second nut, the one or more drive surfaces being oblique to the lead screw axis, wherein displacement of the lever body along the lead screw axis in a first direction biases the first nut and second nut toward the lead screw axis, and displacement of the lever body along the lead screw axis in a second direction biases the first nut and second nut away from the lead screw axis;
- and
- one or more nut housings having one or more nut body cavities, the one or more nut housings being at least partially in the lever body cavity and being slidable in the lever body cavity along the lever body axis, the first nut and the second nut each being at least partially in the one or more nut body cavities and being slideable in the one or more nut body cavities.
6 more elements
A selectively engageable medical device drive assembly comprising:
- a lever body having a proximal end, a distal end, and portions defining an interior cavity;
- a nut housing in the interior cavity of the lever body, the nut housing being slidable relative to the lever body, the nut housing having a proximal opening, a distal opening, portions defining a nut cavity, and portions defining a first nut housing slot and a second nut housing slot;
- a lead screw having a proximal end, a distal end, and a lead screw body extending from the proximal end to the distal end, the lead screw body defining a lead screw axis, the lead screw body extending through the proximal opening and distal opening in the nut housing, and an engagement portion of the lead screw being at least partially in the interior cavity of the nut housing;
- a split nut in the nut cavity, the split nut including a first nut part and a second nut part, the first nut part including a first engagement portion and a first nut slot, and the second nut part including a second engagement portion and a second nut slot;
- the first engagement portion and second engagement portion being sized and shaped to engage with the engagement portion of the lead screw;
- and
- a first pin in the first nut slot and the first nut housing slot, and a second pin in the second nut slot and the second nut housing slot.
4 more elements
Dependencies are inferred from the claim text.