Pump system

• US 20060058732A1
• Filed: 11/08/2005
• Published: 03/16/2006
• Est. Priority Date: 09/27/2002
• Status: Abandoned Application

• Current Assignee: Surgitech, LLC
• Original Assignee: Surgitech, LLC
• Inventors: Harp, Richard J.
• Application Number:
  US11/269,233
• Publication Number:
  US 20060058732A1
• Time in Patent Office: Days
• US Class Current: 604/30
• CPC Class Codes: A61B 1/00165 with light-conductive means, e.g. fibre optics A61B1/07 takes precedence
• CPC Class Codes: A61B 1/00167 Details of optical fibre bundles, e.g. shape or fibre distribution
• CPC Class Codes: A61B 1/015 Control of fluid supply or evacuation
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 1/3135 for examination of the epidural or the spinal space
• CPC Class Codes: A61B 17/1624 Drive mechanisms therefor
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 2017/320028 with reciprocating movements

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.

Claims

1. A pump comprising:

a fluid path;

two plungers configured to at least partially occlude said fluid path;

a cam configured to cause said two plungers to at least partially occlude said fluid path alternatingly; and

at least one check valve along said fluid path for reducing backflow of fluid within said fluid path.

2. The pump of claim 1, wherein the cam translates in a direction that is substantially perpendicular to a long axis of at least one of said two plungers.

3. The pump of claim 2, wherein the cam translates in a direction that is substantially perpendicular to a long axis of each of said two plungers.

4. The pump of claim 1, wherein the pump is mechanically coupled to a transmission that converts rotary motion to reciprocating, linear motion.

5. The pump of claim 4, wherein the transmission comprises:

two surfaces that are a substantially fixed distance apart;

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 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 move linearly in response to the cam'"'"'s rotation about the central axis.

6. A pump comprising:

a fluid path;

two plungers configured to at least partially occlude said fluid path;

means for causing said two plungers to at least partially occlude said fluid path alternatingly; and

at least one check valve along said fluid path for reducing backflow of fluid within said fluid path.

7. The pump of claim 6, wherein said means translates in a direction that is substantially perpendicular to a long axis of each of said two plungers.

8. The pump of claim 6, wherein said means translates in a direction that is substantially perpendicular to a long axis of at least one of said two plungers.