|Publication number||US2845072 A|
|Publication date||29 Jul 1958|
|Filing date||21 Jun 1955|
|Priority date||21 Jun 1955|
|Publication number||US 2845072 A, US 2845072A, US-A-2845072, US2845072 A, US2845072A|
|Inventors||William A Shafer|
|Original Assignee||William A Shafer|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (4), Referenced by (38), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
July 29, 1958 w. A. sHAl-'ER 2,845,072
SURGICAL KNIFE Filed June 21, 1955 imail, Amplif/ar W//idm 'A Shafer 1N VEN TOR.
wrydvgnv United States Patent O SURGICAL KNIFE William A. Shafer, Erie, Pa.
Application June 21, 1955, Serial No. 516,967
2 Claims. (Cl. 128-303.14)
This invention relates generally to surgical knives, and more particularly to instruments having reciprocating blades.
The primary object of the present invention resides in the provision of a surgical knife having means for reciprocating the blade at a controlled frequency to thereby enable a physician to undertake delicate surgical procedures by minimizing the possibility of tearing.
A further object of the invention resides in the provision of a surgical knife which minimizes the pain of cuttingrdue to the fact that the blade is reciprocating at high speeds to which the patients body is not immediately sensitive.
A further object of the invention resides in the provision of a surgical knife having a reciprocating blade the frequency of which may be controlled so that the blade is reciprocated at a desired frequency for various procedures.
Still further objects and features of this invention reside in the provision of a surgical knife that is simple in construction, highly efficient in operation, relatively light in weight and easily carried, and which is highly eicient in use while being relatively inexpensive to produce, thereby permitting wide distribution and utilization.
These, together with the various ancillary objects and features of the invention which will become apparent as the following description proceeds, are attained by this surgical knife, a preferred embodiment of which has been illustrated in the accompanying drawings, by way of example only, wherein:
Figure l is a perspective view of a surgical knife according to my invention;
Figure 2 is alongitudinal sectional view as taken along the plane of line 2-2 in Figure l and showing the surgical knife in an enlarged scale;
Figure 3 is a horizontal sectional view as taken along the plane of line 3 3 in Figure 2;
Figure 4 is a schematic diagram of the electrical components of the invention.
With continuing reference to the accompanying drawings wherein like reference numerals refer to similar parts throughout the various views, and with initial attention directed to the embodiment of the invention of Figure l, reference numeral 20 is used to generally designate the surgical knife comprising the present invention. This surgical knife includes a shaft 22 receivable within a casing 24 which has threadedly secured thereto, as at 26, the neck portion 28 of a housing 30 which is formed 1n two parts that are threadedly secured to each other, as
v2,845,072 Patented July 29, 1958 at 32, the upper portion of the housing 34 having a threaded neck portion 36 to which an upper portion 38 of the casing is threadedly secured.
Mounted within the casing 24 is a bearing 40 of nylon or other suitable material through which the shaft 2.2 extends, the bearing 40 forming a suitable guide for the reciprocating shaft 22. Detachably secured by means of a conventional detachable blade connection is a surgical blade 42 of conventional construction.
Within the housing 30, there is located a piezoelectric crystal 44 having a plate 46 at its lower end which has a threaded tubular socket 48 to which the upper threaded end of the shaft 22 is attached. This plate 46 is grounded to the frame, and an upper plate 50 of the crystal 44 has a conductor 52 connected thereto which extends through the guide portion 54 of the casing 38. A second lead S6 is grounded to the casing, as at 58. A variable audio oscillator 60 is connected to the crystal 44 through the audio amplier 62 and by varying the frequency of the output of the oscillator 60 and therefore the amplifier 62, the crystal 44 will cause the plate 46 to vibrate at a predetermined and controlled rate. The housing 30 is formed in sections so as to permit the ready replacement of the crystal 44, as desired.
The foregoing is considered as illustrative only of the principles of the invention. Further, since numerous modifications and changes will readily occur to those skilled in the art, it is not desired to limit the invention to the exact construction and operation shown and described, and accordingly, all suitable modifications and equivalents may be resorted to, falling within the scope of the invention as claimed.
What is claimed as new is as follows:
l. A surgical knife comprising a casing, a shaft mounted in said casing for reciprocating movement and having an end portion extending outwardly of said casing, a blade detachably secured to said shaft, drive means in said casing for reciprocating said shaft, and control means for controlling the frequency of the reciprocatory movement imparted to said shaft by said drive means, said drive means including a piezoelectric crystal connected to said shaft, said control means comprising a variable audio oscillator coupled through an amplifier to said piezoelectric crystal.
2. A surgical knife comprising a casing, a shaft mounted in said casing for reciprocating movement and having an end portion extending outwardly of said casing, a blade detachably secured to said shaft, drive means in said casing for reciprocating said shaft, and control means for controlling the frequency of the reciprocatory movement imparted to said shaft by said drive means, said drive means including a piezoelectric crystal connected to said shaft, said control means comprising a variable audio oscillator coupled through an amplifier to said piezoelectric crystal, said casing having a housing for said piezoelectric crystal detachably secured thereto.
References Cited in the tile of this patent UNITED STATES PATENTS 1,675,805 Holcomb July 3, 1928 1,966,446 Hayes July 17, 1934 2,714,890 Vang Aug. 9, 1955 2,730,103 Mackta Ian. 10, 1956
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1675805 *||28 Sep 1927||3 Jul 1928||Robert F Cameron||Electric razor|
|US1966446 *||14 Feb 1933||17 Jul 1934||Harvey C Hayes||Impact tool|
|US2714890 *||6 Aug 1953||9 Aug 1955||Vang Alfred||Vibratory surgical instruments|
|US2730103 *||22 Nov 1954||10 Jan 1956||Mackta Leo||Magnetostrictive cutting tool|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3360664 *||30 Oct 1964||26 Dec 1967||Gen Dynamics Corp||Electromechanical apparatus|
|US3378429 *||4 Jan 1965||16 Apr 1968||Branson Instr||Method and apparatus for treating material with sonic energy|
|US3452741 *||27 May 1966||1 Jul 1969||Schaffer Richard C||Conetome|
|US3832776 *||24 Nov 1972||3 Sep 1974||H Sawyer||Electronically powered knife|
|US3888004 *||20 Sep 1974||10 Jun 1975||Coleman Donald Jackson||Ultrasonsically vibrated surgical cutting instrument|
|US4750488 *||27 Feb 1987||14 Jun 1988||Sonomed Technology, Inc.||Vibration apparatus preferably for endoscopic ultrasonic aspirator|
|US4750902 *||19 May 1986||14 Jun 1988||Sonomed Technology, Inc.||Endoscopic ultrasonic aspirators|
|US4832683 *||15 Jul 1986||23 May 1989||Sumitomo Bakellite Company Limited||Surgical instrument|
|US4922902 *||16 Dec 1987||8 May 1990||Valleylab, Inc.||Method for removing cellular material with endoscopic ultrasonic aspirator|
|US5211646 *||19 Sep 1991||18 May 1993||Alperovich Boris I||Cryogenic scalpel|
|US5261922 *||20 Feb 1992||16 Nov 1993||Hood Larry L||Improved ultrasonic knife|
|US5334183 *||9 Apr 1992||2 Aug 1994||Valleylab, Inc.||Endoscopic electrosurgical apparatus|
|US5342380 *||29 Apr 1993||30 Aug 1994||Hood Larry L||Ultrasonic knife|
|US5695510 *||12 Aug 1994||9 Dec 1997||Hood; Larry L.||Ultrasonic knife|
|US5810859 *||28 Feb 1997||22 Sep 1998||Ethicon Endo-Surgery, Inc.||Apparatus for applying torque to an ultrasonic transmission component|
|US5935142 *||7 Aug 1997||10 Aug 1999||Hood; Larry L.||Cavitation-assisted method of material separation|
|US5935143 *||7 Aug 1997||10 Aug 1999||Hood; Larry L.||Ultrasonic knife|
|US5968060 *||28 Feb 1997||19 Oct 1999||Ethicon Endo-Surgery, Inc.||Ultrasonic interlock and method of using the same|
|US5989275 *||28 Feb 1997||23 Nov 1999||Ethicon Endo-Surgery, Inc.||Damping ultrasonic transmission components|
|US6004335 *||12 Feb 1996||21 Dec 1999||Ethicon Endo-Surgery, Inc.||Ultrasonic hemostatic and cutting instrument|
|US6274963||31 Aug 1999||14 Aug 2001||Ethicon Endo-Surgery, Inc.||Methods and devices for controlling the vibration of ultrasonic transmission components|
|US6379371||15 Nov 1999||30 Apr 2002||Misonix, Incorporated||Ultrasonic cutting blade with cooling|
|US6443969 *||15 Aug 2000||3 Sep 2002||Misonix, Inc.||Ultrasonic cutting blade with cooling|
|US6514267||26 Mar 2001||4 Feb 2003||Iep Pharmaceutical Devices Inc.||Ultrasonic scalpel|
|US7361172||4 Jun 2003||22 Apr 2008||Sound Surgical Technologies Llc||Ultrasonic device and method for tissue coagulation|
|US8317726 *||27 Nov 2012||Boston Scientific Scimed, Inc.||Biopsy forceps assemblies|
|US8343178||1 Jan 2013||Misonix, Incorporated||Method for ultrasonic tissue excision with tissue selectivity|
|US8672859 *||23 Oct 2012||18 Mar 2014||Boston Scientific Scimed, Inc.||Biopsy forceps assemblies|
|US20030204199 *||30 Apr 2002||30 Oct 2003||Novak Theodore A. D.||Device and method for ultrasonic tissue excision with tissue selectivity|
|US20040102801 *||4 Jun 2003||27 May 2004||Cimino William W.||Ultrasonic device and method for tissue coagulation|
|US20050273127 *||2 Aug 2005||8 Dec 2005||Misonix, Incorporated||Method for ultrasonic tissue excision with tissue selectivity|
|US20060100616 *||2 Nov 2005||11 May 2006||Crescendo Technologies, Llc||Ultrasonic device|
|US20100318119 *||15 Jun 2010||16 Dec 2010||Boston Scientific Scimed, Inc.||Biopsy forceps assemblies|
|US20130085412 *||23 Oct 2012||4 Apr 2013||Tyler Timberlake||Biopsy forceps assemblies|
|US20150282834 *||18 Jun 2015||8 Oct 2015||Ethicon Endo-Surgery, Inc.||Ultrasonic surgical instrument blades|
|DE3507672A1 *||5 Mar 1985||11 Sep 1986||Otto Meyer||Instrument with a surgical tool for severing or suturing tissues|
|DE10114672A1 *||23 Mar 2001||26 Sep 2002||Hesse & Knipps Gmbh||Ultrasonic vibrator e.g. for machine tool, has vibration element in form of plate to which ultrasonic vibration generator is attached on one side of plate|
|EP0711128A1 *||31 Mar 1994||15 May 1996||Ethicon Endo-Surgery, Inc.||Ultrasonic surgical instrument and methods for manufacturing|
|U.S. Classification||606/169, 30/45, 310/328|
|Cooperative Classification||A61B17/320068, A61B17/3213|