Drive apparatus
First Claim
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1. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:
- two surfaces of two respective bearings, the two surfaces being a substantially fixed distance apart; and
a cam that rotates about a central axis that is (a) substantially parallel to a direction of the linear motion of the two surfaces and (b) substantially perpendicular to a plane extending between the two surfaces;
wherein said central axis is at an angle to the plane extending between the two surfaces;
the cam having a curvilinear body of nonuniform thickness, the curvilinear body being disposed at an angle to the central axis of the cam;
wherein the curvilinear body has a shape comprising at least two toruses, the at least two toruses being partially superimposed, and each of said at least two toruses has a central axis, wherein the central axes of the at least two toruses are at an angle to each other; and
wherein the body continuously contacts the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move linearly back and forth in reciprocating motion in response to the cam'"'"'s rotation about the central axis.
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Accused Products
Abstract
The invention relates to shielded reciprocating surgical file system for precisely removing bone and/or other tissue material. The system allows a user to maneuver the system and navigate into hard to access sites under a direct vision mechanism included in the system. A transmission mechanism converts rotary motion from a motor into reciprocating motion and provides it to the surgical file for precision bone and/or tissue removal. A pulsatile pump mechanism is operatively coupled with the transmission mechanism and provides irrigating fluid to the surgical site.
63 Citations
32 Claims
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1. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:
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two surfaces of two respective bearings, the two surfaces being a substantially fixed distance apart; and a cam that rotates about a central axis that is (a) substantially parallel to a direction of the linear motion of the two surfaces and (b) substantially perpendicular to a plane extending between the two surfaces; wherein said central axis is at an angle to the plane extending between the two surfaces; the cam having a curvilinear body of nonuniform thickness, the curvilinear body being disposed at an angle to the central axis of the cam; wherein the curvilinear body has a shape comprising at least two toruses, the at least two toruses being partially superimposed, and each of said at least two toruses has a central axis, wherein the central axes of the at least two toruses are at an angle to each other; and wherein the body continuously contacts the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move linearly back and forth in reciprocating motion in response to the cam'"'"'s rotation about the central axis. - View Dependent Claims (2, 3, 4)
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5. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:
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two surfaces that are a substantially fixed distance apart, the two surfaces connected to move with a slide that is configured for reciprocating linear movement; and a cam that rotates about a central axis, said central axis being at an angle to a plane extending between the two surfaces; the cam having a curvilinear body, the body having a nonuniform thickness, wherein the body continuously contacts the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they and the connected slide move linearly in response to the cam'"'"'s rotation about the central axis; wherein the cam body comprises first and second cam body surfaces on opposing sides of the cam body, and the first cam body surface continuously contacts a first one of the two surfaces, and the second cam body surface continuously contacts a second one of the two surfaces. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:
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two surfaces that are a substantially fixed distance apart, the two surfaces connected to move with a slide that is configured for reciprocating linear movement; a cam that rotates about a central axis, said central axis being at an angle to a plane extending between the two surfaces; and the cam having means for continuously contacting the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move and the connected slide linearly in response to the cam'"'"'s rotation about the central axis; wherein the means for continuously contacting the two surfaces comprises first and second cam surfaces on opposing sides of the cam and the first cam surface continuously contacts a first one of the two surfaces, and the second cam surface continuously contacts a second one of the two surfaces. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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26. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:
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two surfaces that are a substantially fixed distance apart, the two surfaces connected to move with a slide that is configured for reciprocating linear movement; and rotation means that rotates about a central axis, said central axis being at an angle to a plane extending between the two surfaces; wherein the rotation means is configured to continuously contact the two surfaces as the rotation means rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they and the connected slide move linearly in response to the rotation means that rotates about the central axis; wherein the rotation means that rotates about the central axis comprises first and second surfaces on opposing sides of the rotation means that rotates about the central axis, and the first surface continuously contacts a first one of the two surfaces, and the second surface continuously contacts a second one of the two surfaces. - View Dependent Claims (27, 28, 29, 30, 31, 32)
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Specification