Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3852881 A
Publication typeGrant
Publication dateDec 10, 1974
Filing dateJun 11, 1973
Priority dateJun 11, 1973
Publication numberUS 3852881 A, US 3852881A, US-A-3852881, US3852881 A, US3852881A
InventorsJ Treace
Original AssigneeRichards Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Cutting blade for use with an oscillating cutting device
US 3852881 A
Abstract
A cutting blade for use in cutting off fracture-fixation pins with an oscillating cutting device. At least one elongated aperture with a plurality of hollow-ground saw teeth located on its periphery is provided on the blade to smoothly cut off the fracture-fixation pins. An attachment member is provided on the cutting blade to attach it to the oscillating cutting device.
Images(1)
Previous page
Next page
Description  (OCR text may contain errors)

' llnite tates Patent 11 1' Treace Dec. 10,1974

1 41 CUTTING BLADE FOR USE WITH AN OSCILLATING CUTTING DEVICE [75] Inventor: James T. Treace, Santa Monica,

Calif. [73] Assignee: Richards Manufacturing Company,

- Memphis, Tenn.

22 Filed: June 11, 1973 '21 Appl. No.2 368,656

[52] U.S. Cl 30/92, 30/124, 30/347,

83/491, 128/317 [51] Int. Cl B2311 45/00, B26b 25/00 [58] Field of Search...., 30/92, 94, 124, 95, 96,

[56] References Cited UNITED STATES PATENTS 149,932 4/1874 Hogeland 83/846 X 1,195,591 Kammer 30/94 2,557,364 6/1951 Treace 128/317 3,086,567 4/1963 Jetten 83/491 X 3,740,847 6/1973 Kliever 30/347 X Primary ExaminerAl Lawrence Smith Assistant ExaminerJ.,C. Peters Attorney, Agent, or Firm-John R. Walker, Ill

[5 7 ABSTRACT A cutting blade for use in cutting off fracture-fixation pins with an oscillating cutting device. At least one elongated aperture with a plurality of hollow-ground sawteeth located on its periphery is provided on the blade to smoothly cut off the fracture-fixation pins. An attachment member is provided on the cutting blade to attach it to the oscillating cutting device.

12 Claims, 5 Drawing Figures PATENTED B 1 0 I974 3,852,881

1. CUTTING BLADE FOR USE WITH AN OSCILLATING CUTTING DEVICE BACKGROUND OF THE INVENTION l. Field of the Invention:

This invention relates generally to oscillating cutting devices and more specifically to cutting blades for use in cutting off fracture-fixation pins with such oscillating cutting devices.

2. Description of the Prior Art:

The following US. Pat. Nos. disclose oscillating cutting-devices: Stryker, 2,427,580; Cecere, 3,044,171; Cummins, 3,091,851; Gary, 3,103,069; and Shaheen, 3,199,194. None of the above references disclose or suggest the present invention.

Previously, fracture-fixation pins have been cut off by devices based upon the principle of shearing. See, for example, the Richards Manufacturing Companys Orthopedic and Orthological Instrument Catalogue, 1967, pp. 97-99. These prior devices are disadvantageous in that they leave a rough edge on the'pin after it is cut off. It should be pointed out that such fracturefixation pins are for use in anchoring bone fractures so that the bone will grow back together properly. The part of the pin which protrudes through the patients skin must be cut or broken off.

SUMMARY OF THE INVENTION gated aperture is provided on the body portion about a curved center line every point of which is equally distant from the center of the attachment member. The cutting blade also includes a cutting portion located on the periphery of the elongated aperture for cutting off the fracture-fixation pins. The cutting portion consists of a plurality of hollow-ground saw teeth.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. I is a front elevational view of the cutting blade I of the present invention.

FIG. 2 is a side elevational view of the cutting blade of the present invention shown mounted on a portion of an oscillating cutting device.

FIG. 3 is a front elevational view ofa second embodiment of the cutting blade of thepresent invention.

'FIG. 4 is an enlarged sectional view of a portion of the cutting blade of the present invention as'taken on line IV--IV of FIG. 1.

FIG. 5 is a sectional view of the cutting blade of the present invention similar to FIG. 4 showing a fracturefixation pin after it has been cut off.

DESCRIPTION OF THE PREFERRED EMBODIMENT The cutting blade 11 of the present invention is for use with an oscillating cutting device 13. The oscillating cutting device 13 is of any suitable type such as that disclosed in the heretofore mentioned Stryker patent.

The cutting blade '11 includes a body portion 15 and a cutting portion 17.

The body portion 15 includes an attachment member 19 for mounting the body portion 15 onto the oscillating cutting device 13. The attachment member 19 preferably consists of a triangular stud 21 for mounting onto the oscillating cutting device 13 by means of a triangular chuck 23 of the oscillating cutting device 1-3 known to those skilled in the art. At least one elongated aperture 25 is provided on the body portion 15 of the cutting blade 11 about a curved center line every point of which is equally distant from the center of the attachment member.

The cutting portion 17 preferably consists of a plural ity of hollow-ground saw teeth 27. In other words, the cutting portion 17 differs from normal saw teeth 28 as shown in phantom lines in FIG. 4 by the hollowed portion 27' of the hollow-ground saw teeth 27. The hollowed portion 27' allows a fracture-fixation pin P to be cut off with a smooth, rounded portion P on the ends thereof. The cutting blade 11 preferably includes a trough-like member 29 located on the periphery of the body portion 15 beneath the elongated aperture 25 for catching any metal filings produced when the fracturefixation pin P is being cut off. In addition, the troughlike member 29 acts as'a bumper means to protect the skin of the patient having the fracture-fixation pin P cut off.

In one embodiment of the cutting device blade 11 as shown in FIGS. 1 and 2, the body portion l5-includes one elongated aperture 25 and is in the shape of a segment ofa circle. In a second embodiment of the cutting blade 11 as shown in FIG. 3, the body portion 15 is circular and includes three elongated apertures 25. In this second embodiment, the cuttingblade 11 is mounted to the oscillating cutting device 13 in one of three positions provided by the triangular stud 21 and the triangular chuck 23. By use of the three apertures 25, the life of the cutting blade 11 is greatly extended. That is, when the cutting portion 17 of one aperture 25 is dulled by use, the cutting blade 11 may be rotated to provide a new cutting portion 17 of one of the other apertures 25. In addition, each of the plurality of elongated apertures 25 may be of a different size as shown in FIG. 3 of the drawings. The cutting blade 11 can thereby efficiently accommodate a wide range of different sizes of fracture-fixation pins P.

The use of the cutting blade 11 of the present invention is quite simple. First, the cutting blade 11 is mounted onto the oscillating cutting device 13. The

- head of the fracture-fixation pin P to be cut off is passed through an elongated aperture 25 in the body portion 15 of the cutting blade 11. When the cutting device 13 is activated to oscillate the cutting blade 11, it is preferably manually maneuvered to allow the cutting portion 17 to Contact all portions of the circumference of the fracture-fixation pin P being cut off. In this manner, the plurality of hollow-ground saw teeth 27'of the cutting portion 17 provides a rounded portion P on the edge of the fracture-fixation pin P being cut off as shown in FIG. 5. Thus, the fracture fixation pin P is cut off smoothly so that no rough edge is left on the pin P after it has been cut off.

Although the invention has been described and illustrated with respect to preferred embodiments thereof, it is not to be so limited since changes and modifications may be made therein which are within the full intended scope of the invention.

I claim:

1. A cutting blade for use with an oscillating cutting device in cutting off fracture-fixation pins, said cutting blade comprising: 4

a. a body portion having anattachment member for mounting said body portion onto the oscillating cutting device and having an elongated aperture spaced away from said attachment member; and

b. a cutting portion located around the entire periphery of said elongated aperture for allowing said cutting portion to selectively contact all portions of the circumference of the fracture-fixation pin being cut off to smoothly cut off the fracturefixation pin.

2. The cutting blade of claim 1 in which said cutting portion consists of a plurality of hollow-ground saw teeth. I

3. The cutting blade of claim 2 in which said aperture s located about a curved center line every point of which is equally distant from the center of said attachment member.

4. A cutting blade for use with a oscillating cutting device in cutting off fracture-fixation pins, said cutting blade comprising:

a. a body portion having an attachment member for mounting said body portion onto the oscillating cutting device and having an elongated aperture spaced away from said attachment member and located about a curved center. line every point of which is equally distant from the center of said attachment member;

b. a cutting portion located on the periphery of said elongated aperture for cutting off the fracturefixation pin, said cutting portion consisting ofa plurality of hollowground saw teeth; and

c. a trough-like member located on'the peripheryof said body portion beneath said elongated aperture for catching any filings produced when the pin is being cut off. v

5. The cutting blade of claim 4 in which said body portion is circular and includes a plurality of elongated apertures.

6. The cutting blade of claim 5 in which said body portion includes three elongated. apertures and in which said attachment member consists of a triangular stud for mounting onto the oscillating cutting devicein one of three positions by means of'a triangular'chuck of the oscillating cutting device.

7. A cutting blade for use with an oscillating cutting device incutting off fracture-fixation pins, said cutting 4 blade comprising:

a. a bodyportion having an attachment member for mounting said body portion onto the oscillating cutting device and having an elongated aperture located about a curved center lineevery point of which is equally distant from the center of said attachment means;

b. a plurality of hollow-ground saw teeth located on the periphery of said elongated aperture; and

c. a trough-like member located on the periphery of said body portion beneath said elongated aperture for catching any filings produced when the pin is being cut off.

8. The cutting blade of claim 7 in which said body portion is circular and includes a plurality of said elongated apertures.

9. The combination with an oscillating cutting device of a cutting blade for use in cutting off fracture-fixation pins, said cutting blade comprising:

a. a body portion having an attachment member mounting said body portion onto the oscillating cutting device and having an elongated aperture spaced away from said attachment member;

b. a cutting portion located around the entire periphery of said elongated aperture for allowing said cutting portion to selectively contact all portions of the circumference of the fracture-fixation pin being cut off to smoothly cut off the fracturefixation pin.

10. The combination of claim 9 in which said cutting portion consists of a plurality of hollow-ground saw teeth.

11. The combination with an oscillating cutting device of a cutting blade for use in cutting off fracturefixation pins, said cutting blade comprising:

a. a body portion having an attachment member mounting said body portion onto the ocillating cutting device and having an elongated aperture lo cated about a curved center line every point of which is equally distant from the center of said attachment means;

b. a plurality of hollow-ground saw teeth located on the periphery of said elongated aperture; and

c. a trough-like member located on the periphery of said body portion beneath said elongated aperture for catching any filings produced when the pin-'is being cut off.

12. The combination of claim 11 in which said body portion is circular and includes a plurality of elongated apertures.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US149932 *Dec 12, 1873Apr 21, 1874 Improvement in circular saws
US1195591 *Nov 15, 1915Aug 22, 1916 Mbtal-ttjbihg cutter
US2557364 *Jun 15, 1948Jun 19, 1951Orthopedic Frame CoSurgical saw blade
US3086567 *Jun 29, 1961Apr 23, 1963Willem KoelegaSawing machine comprising a circular saw provided with an internal toothing
US3740847 *Feb 4, 1971Jun 26, 1973Kliever WPower driven meat trimming and cutting knife
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3952412 *Mar 28, 1975Apr 27, 1976Rhodes William AOscillatory saw
US4513742 *Sep 14, 1982Apr 30, 1985Arnegger Richard ESaw blade with aperture
US5263972 *Dec 11, 1992Nov 23, 1993Stryker CorporationSurgical handpiece chuck and blade
US5439472 *Jul 14, 1993Aug 8, 1995Stryker CorporationSurgical handpiece chuck and blade
US5468247 *Oct 19, 1994Nov 21, 1995Stryker CorporationSaw blade for powered medical handpiece
US5479971 *Aug 1, 1994Jan 2, 1996Marshall; Lorry L.Dual action tree cutting apparatus
US5702415 *Sep 8, 1995Dec 30, 1997Stryker CorporationChuck and blade for powered medical handpiece
US6540760 *Jun 19, 2001Apr 1, 2003Oasis Medical, Inc.Cutting blade and cutting blade assembly
US7451677 *Jan 27, 2003Nov 18, 2008Eugene Carbide Saw & Machine, Inc.Saw blade with secondary teeth
US7487704Feb 16, 2007Feb 10, 2009Eugene Carbide Saw Service, Inc.Saw blade with multiple interior secondary saw teeth
US7640838Oct 22, 2008Jan 5, 2010Eugene Carbide Saw Service, Inc.Saw blade with secondary teeth separated by deep gullets
US8677873Oct 22, 2008Mar 25, 2014Eugene Carbide Saw Service, Inc.Band saw blade with interior teeth
Classifications
U.S. Classification30/92, 30/347, 83/491, 30/124, 606/178
International ClassificationB23D61/02, A61B17/14, B27B19/00
Cooperative ClassificationB23D61/025, B23D61/021, A61B17/148, A61B17/14, B27B19/006, A61B17/141, B23D61/006
European ClassificationB23D61/00D, B23D61/02B, B27B19/00D, A61B17/14, B23D61/02D