Guillotine cutter used with medical procedures

• US 5,980,546 A
• Filed: 04/13/1998
• Issued: 11/09/1999
• Est. Priority Date: 04/13/1998
• Status: Expired due to Fees

• Current Assignee: Nexus Medical System, Inc.
• Original Assignee: Nexus Medical System, Inc.
• Inventors: Hood, Larry L.
• Primary Examiner(s): Buiz, Michael
• Assistant Examiner(s): NGO, LIEN M
• Application Number:
  US09/059,166
• Time in Patent Office: 575 Days
• Field of Search: 606/171, 606/175, 606/169, 604/22, 604/35, 604/141
• US Class Current: 606/171
• CPC Class Codes: A61B 17/320016 Endoscopic cutting instruments, e.g. arthroscopes, resectoscopes A61B10/0233, A61B17/29, A61B17/3207 take precedence
• CPC Class Codes: A61B 2017/00544 pneumatically

Abstract

A guillotine surgical cutter. The cutter includes an inner sleeve that moves within the inner channel of an outer sleeve. The distal end of the outer sleeve may have a plurality of outer ports. The inner sleeve may also have an inner channel and one or more openings that are in fluid communication with the outer ports of the outer sleeve. The inner sleeve can be connected to a diaphragm and a disk spring. The diaphragm may be adjacent to a drive chamber that is coupled to a source of pressurized air by a control valve. Actuation of the control valve pressurizes the drive chamber and moves the inner sleeve relative to the outer sleeve. The cutter may include a snap spring that is attached to the disk spring and which provides an additional acceleration of the inner sleeve. The springs return the inner sleeve back to the original position when the control valve is switched to reduce the pressure of the drive chamber.

Claims

1. A surgical cutter, comprising:

a handpiece;

an outer sleeve that is attached to said handpiece and which has an inner channel that extends from a proximal end to a distal end of said outer sleeve, said distal end of said outer sleeve having an outer port;

an inner sleeve that is located within said inner channel of said outer sleeve;

a disk spring that is attached to said inner sleeve and said handpiece;

a snap ring that is attached to said disk spring; and

,

a driver that moves said inner sleeve within said inner channel of said outer sleeve.

2. The surgical cutter as recited in claim 1, wherein said snap ring has a first end attached to an outer diameter of said disk spring and a second end attached to an inner diameter of said disk spring.

3. The surgical cutter as recited in claim 2, wherein said inner diameter is offset from said outer diameter of said disk spring.

4. The surgical cutter as recited in claim 1, wherein said driver includes a source of pressurized fluid that is in fluid communication with a membrane that is attached to said inner sleeve, and a control valve that controls the pressurized fluid.

5. The surgical cutter as recited in claim 1, wherein said inner sleeve has a pair of openings in fluid communication with an inner channel of said inner sleeve.

6. The surgical cutter as recited in claim 5, wherein each opening of said inner sleeve is coupled to a pair of outer ports of said outer sleeve.