|Publication number||US3905101 A|
|Publication date||Sep 16, 1975|
|Filing date||Apr 19, 1974|
|Priority date||Apr 19, 1974|
|Publication number||US 3905101 A, US 3905101A, US-A-3905101, US3905101 A, US3905101A|
|Inventors||John W Shepherd|
|Original Assignee||Becton Dickinson Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (11), Referenced by (78), Classifications (13)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent 1191 Shepherd 14 1 Sept. 16, 1975 DISPOSABLE SURGICAL SCALPEL  Inventor: John W. Shepherd, Montgomery,
 Assignee: Becton, Dickinson and Company,
East Rutherford, NJ.
 Filed: Apr. 19, 1974  Appl. No.: 462,319
 us. Cl. 30/162; 30/320; 30/335; 30/339  Int. Cl A61B 17/32; 3268 H08; 8268 5/00  Field of Search 30/336, 335, 162, 320, 30/293, 151, 163, 164, 337, 338, 339, 329; 128/305  References Cited UNITED STATES PATENTS 1,853,672 4/1932 Dodson 30/l62 1,888,488 11/1932 Brown 30/337 x 2,051,199 8 1936 Christianson 30/320 2,270,655 1/1942 Keeran 2.611,178 9 1952 Whipple et a1. 2,735,176 2 1956 COStin 2,749,924 6/1956 Polincovsky 30/162 x Nissen 3,025,598 3/1962 30/l62 3,448,518 6/1969 Sklar 30/l62 3,708,881 l/l973 Bennett. 30/335 3,765,089 l0/l973 lbata 30/l62 X FOREIGN PATENTS OR APPLICATIONS 670,894 8/l929 France 30/162 853,565 l2/l939 France 30/162 Primary Examiner-Al Lawrence Smith Assistant ExaminerJ. T. Zatarga Attorney, Agent, or FirmKane, Dalsimer, Kane, Sullivan and Kurucz  ABSTRACT A disposable surgical scalpel assembly is disclosed which comprises a frangible handle, a cutting blade and a sheath in a single unitary assembly. The sheath is attached to the handle and movable to blade guarding and blade unguarded positions. When the sheath is in a blade unguarded position, with the blade exposed, the sheath serves as a gripping surface for the handle. The sheath component of the assembly may be releasably locked in either position for safe handling.
3 Claims, 4 Drawing Figures PATENTEU 5 i 75 sum 2 of 2 DISPOSABLE SURGICAL SCALPEL BACKGROUND OF THE INVENTION 1. Field of the Invention The invention concerns medical-surgical instruments and more particularly concerns a disposable surgical scalpel.
2. Description of the Prior Art Although surgical scalpels have been used for centuries, little has been done in the way of advancing their basic design. In recent years, the commercially important surgical scalpels have been those having disposable blade portions. Illustrative of this type of surgical scalpel is that disclosed in US. Pat. No. 3,412,467. In scalpels of the latter type, the blade component is detachable from the handle component and disposed of by deposit in a special container which may thereafter be handled without hazard. It will be appreciated, however, that such disposable surgical scalpels still present a hazard to the individual who must detach and transfer the blade component.
U.S. Pat No.-2,735,176 discloses a veterinary surgical knife which comprises a hollow handle component having a slidably extensible blade. A similar cutting instrument is disclosed in U.S. Pat. No. 2,512,237. In effect, the latter instruments employ the handle component as a sheath for the blade component when not in use. Such sheathable blades are not contemplated for disposal after a single use and are relatively costly in that they generally employ sophisticated locking mechanisms and relatively complex protraction and retraction mechanisms.
The demand on the part of hospital administrators and liability insurance carriers for a disposable scalpel has increased considerably in recent years. The ultimate in desirability is a surgical scalpel which may be disposed of safely with the least potential for reusing the scalpel, and of course the instrument must be simple to operate and economical to produce.
The surgical scalpel of this invention obviates many of the prior art problems. First, the surgical scalpel of this invention includes a means of sheathing the blade component wtihout risking the hazards of blade removal. Second, once sheathed. access to the blade component requires a positive act, thereby assuring that the scalpel is unlikely to be accidentally unsheathed during handling for disposal. Third, the sealpel is unitary in construction. assuring that the sheath component will not become separated from the blade component and thereby lost, yet the means of attachment and dual use of the sheath as part of the gripping surface provides a scalpel which has the desired balance" or feel desired for the surgeons sensitive touch.
SUMMARY OF THE INVENTION The invention comprises a unitary, disposable surgical scalpel which comprises; a frangible handle. a cutting blade attached to said handle, a sheath movably attached to said handle, means for releasably locking said sheath in a first position sheathing said blade and means for releasably locking said sheath in a second position exposing the blade.
The term unitary as used herein means a singleinonoassembly.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an isometric drawing of an embodiment of the invention showing a surgical scalpel with sheath as sembly. The sheath is shown in the blade sheathing position.
FIG. 2 is an isometric view of the embodiment shown in FIG. 1 but with the sheath in a retracted or operating position exposing the cutting blade.
FIG. 3 is a schematic view showing the assembly of FIG. 1 in disassembly.
FIG. 4 is a cross-sectional view taken along lines 4-4 of FIG. 1.
DETAILED DESCRIPTION OF THE INVENTION The disposable scalpel of the invention is conveniently fabricated by conventional and standard methods for preparing surgical scalpels using conventional and standard materials. For example, the blade component of the surgical scalpel may be the standard surgical steel blade conventionally employed in making surgical scalpels. The handle and sheath components of the scalpel may be fabricated from conventional polymer materials such as, for example, polystyrene, polycarbonate, polyurethane. polyethylene, phenolformaldehyde resins, polybutylene and like polymeric materials The disposable scalpels of the invention are conveniently described and exemplified by reference to the various specific embodiments set forth in the drawings attached hereto.
FIG. 1 is an overall view of an embodiment of the invention. The disposable surgical scalpel embodiment shown comprises a handle 10 which comprises a butt l2 and a shank 14 which is reduced in thickness and over which sheath 16 may slide. Sheath I6 is shown in a position covering the blade component of the surgical scalpel. The sheath position illustrated in- FIG. I is for covering and protecting the blade component prior to use. It will be seen from FIG. 1 that the sheath has an aperture 26 for receiving lug 29 which is an integral part of the underlying shank 14 being mounted on a resilient bar portion of shank 14 (not seen under sheath 16). Lug 29 when inserted through aperture 26 blocks movement of the sheath in forward or rearward movement. At the butt 12 end of shank 14 there is seen a second lug 20 on the end of resilient bar 28, which is an integral part of shank 14. By pressing lug 29 downwardly to disengage it from engagement with aperture 26, and retracting sheath 16 over lug 20, lug 20 will engage aperture 26 to lock sheath 16 in a blade 24 exposing position as seen best in FIG. 2. In this position, sheath 16 serves as a gripping surface when using the scalpel. In a preferred embodiment. sheath 16 has raised surfaces 22 to provide a frictional surface for grasping. To cover the blade 24, the operator need only depress lug 20 on resilient bar 28 and move the sheath l6 forward until lug 29 again engages aperture 26 of sheath 16. When desired, the scalpel with blade covcred as shown in FIG. I may be safely discarded by breaking frangible shank I4 (facilitated by its reduced width) and depositing the broken parts in an appropriate receptacle. With the blade covered, no hazard is presented to handlers of the discarded pieces.
The features hidden from view in FIGS. I and 2 are seen with greater clarity by reference to FIG. 3, where the various components making up the disposable surgical scalpel of FIGS. 1 and 2 are readily observed disassembled. Thus, sheath 16 comprises an elongate sheath open at both ends 18 and 21 and has frictional surfaces 22. At the top of sheath 16 is aperture 26. The handle comprises a butt end 12 and a shank l4 having a cut-out portion 15. Shank 14 is frangible, having a weakened area of reduced thickness. This weakened area is easily fractured when the sheath 16 is in a blade protecting position. This provides an easy method of breaking the handle 10 prior to disposal of the surgical scalpel. With the handle 10 broken. a reuse of the discarded blade is discouraged, particularly since access to the blade component is not easily obtained without the aid of a whole handle 10. The weakened portion of the shank 14 in no way impairs the use of the scalpel by a surgeon since when the sheath 1) component of the assembly is in a retracted position for operating use, the sheath 16 serves to strengthen and protect the handle 10, thereby obviating the likelihood that the thin portion of shank 14 would fracture while the scalpel is being employed.
FIG. 3 also shows the mounting of blade 24 on blade support 31 where it is held in place by bayonet lock 42 and covered by blade mounting piece 33. As shown in FIG. 3, the blade 24 is fixedly attached by a bolt 46. However. in a preferred embodiment. blade 24 is permanently attached by ultrasonic welding of blade support 31 to blade mounting piece 33 with the blade 24 interposed.
FIG. 3 also shows the lug 29 mounted on resilient bar 27 which is an integral part of shank 14. Bar 27 is sufficiently resilient to permit lug 29 to be depressed out of engagement with aperture 26 of sheath 16 when the scalpel is assembled in the blade covered position.
FIG. 4 is a cross-sectional view taken along lines 4-4 of FIG. 1 and more clearly shows the relationship of lug 29, sheath l6 and shank 14.
What is claimed is:
l. A unitary, disposable surgical scalpel which comprises.
a frangible handle;
a cutting blade attached to said handle;
a sheath movably attached to said handle;
means for releasably locking said sheath in a first position sheathing said blade; and
means for releasably locking said sheath in a second position exposing the blade.
2. A scalpel of claim 1 wherein said sheath forms a gripping surface for said handle when said blade is unsheathed.
3. A disposable surgical scalpel with sheath assembly which comprises:
a frangible handle;
a cutting blade affixed to one end of said handle;
a sheath movably attached to said handle and which when moved to a first position is releasably locked by a depressible lug attached to said handle which engages a lug receiving slot in said sheath, in a blade sheathing position; and which when moved to a second position is releasably locked by a depressible lug attached to said handle which engages a lug receiving slot in said sheath, in a blade exposing position; said sheath forming a gripping surface for holding the scalpel, when the sheath is in a blade exposing position.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1853672 *||Jun 8, 1931||Apr 12, 1932||Dodson Alcada F||Pocket knife|
|US1888488 *||Sep 5, 1931||Nov 22, 1932||Robert E Brown||Knife|
|US2051199 *||Jan 18, 1935||Aug 18, 1936||Christianson George M||Plaster cutter|
|US2270655 *||Feb 1, 1941||Jan 20, 1942||Keeran Charles R||Pocketknife|
|US2611178 *||Mar 3, 1947||Sep 23, 1952||Burdette E Bostwick||Pocket implement|
|US2735176 *||May 22, 1953||Feb 21, 1956||Veterinary surgical knife|
|US2749924 *||Aug 12, 1953||Jun 12, 1956||Jack Polincovsky||Combination knife|
|US3025598 *||Oct 13, 1958||Mar 20, 1962||Gillette Co||Knife|
|US3448518 *||Jul 27, 1967||Jun 10, 1969||Sklar Harry||Knife|
|US3708881 *||Mar 22, 1971||Jan 9, 1973||Bennett R||Multi position adjustable roofing knife|
|US3765089 *||Jun 16, 1971||Oct 16, 1973||Nippon Tenshashi Kk||Knife with adjustable blade|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4646440 *||May 31, 1984||Mar 3, 1987||Decker John R||Replaceable blade knife|
|US4735202 *||Oct 6, 1986||Apr 5, 1988||Alcon Laboratories, Inc.||Microsurgical knife with locking blade guard|
|US4922614 *||Apr 29, 1988||May 8, 1990||Kai Cutlery Center Co., Ltd.||Cutter|
|US4985034 *||Jun 1, 1989||Jan 15, 1991||Board Of Regents, The University Of Texas System||Safety surgical blade, handle and shield|
|US5071426 *||Apr 6, 1989||Dec 10, 1991||Stuart Dolgin||Surgical scalpel with retractable blade guard|
|US5085663 *||Jun 27, 1991||Feb 4, 1992||Bernard Tarr||Surgical knife with angular cut control and method of using the same|
|US5139507 *||Aug 15, 1991||Aug 18, 1992||Stuart Dolgin||Surgical scalpel with retractable blade guard|
|US5201748 *||Jun 1, 1992||Apr 13, 1993||Newman Philip H||Retractable-bladed surgical scalpel|
|US5207696 *||Apr 30, 1992||May 4, 1993||Medical Sterile Products, Inc.||Surgical scalpel|
|US5254128 *||Oct 11, 1990||Oct 19, 1993||Micro Engineering, Inc.||Surgical knife with attached, movable blade protector|
|US5299357 *||Dec 18, 1991||Apr 5, 1994||American Safety Razor Company||Disposable surgical scalpel with safety guard|
|US5309641 *||Dec 8, 1992||May 10, 1994||American Safety Razor Company||Disposable surgical scalpel with safety guard|
|US5330494 *||Jan 22, 1993||Jul 19, 1994||Cornelis A. van der Westhuizen||Knife|
|US5403337 *||Jul 5, 1994||Apr 4, 1995||Platts; David||Retractable-bladed surgical scalpel|
|US5411512 *||Nov 12, 1993||May 2, 1995||Leonard Bloom||Guarded surgical scalpel|
|US5417704 *||Dec 20, 1993||May 23, 1995||American Safety Razor Company||Disposable surgical scalpel with safety guard|
|US5431672 *||May 9, 1994||Jul 11, 1995||Becton, Dickinson And Company||Surgical scalpel with retractable blade|
|US5496340 *||Jul 19, 1994||Mar 5, 1996||Leonard Bloom||Combination guarded surgical scalpel and blade stripper|
|US5527329 *||Jan 20, 1995||Jun 18, 1996||Devon Industries, Inc.||Surgical scalpel|
|US5620454 *||Oct 25, 1994||Apr 15, 1997||Becton, Dickinson And Company||Guarded surgical scalpel|
|US5683407 *||Oct 19, 1995||Nov 4, 1997||Becton, Dickinson And Company||Cleanable guarded surgical scalpel with scalpel blade remover|
|US5752968 *||Jan 27, 1995||May 19, 1998||Becton, Dickinson And Company||Guarded surgical scalpel with scalpel blade remover|
|US5792162 *||May 8, 1996||Aug 11, 1998||Becton, Dickinson And Company||Guarded surgical scalpel with scalpel blade remover|
|US5827309 *||Oct 19, 1995||Oct 27, 1998||Becton, Dickinson And Company||Guarded surgical scalpel with scalpel blade remover|
|US5938675 *||Jun 18, 1996||Aug 17, 1999||Beckton, Dickinson And Company||Surgical scalpel|
|US6022364 *||Oct 18, 1996||Feb 8, 2000||Flumene; Antonio Giovanni||Disposable surgical safety scalpel|
|US6626925||Mar 29, 2001||Sep 30, 2003||Becton Dickinson And Company||Shielded surgical scalpel|
|US6757977 *||Jan 25, 2002||Jul 6, 2004||Jai Surgicals Limited||Disposable surgical safety scalpel|
|US6884240||Dec 7, 2001||Apr 26, 2005||Ronald Dykes||Protection system for surgical instruments|
|US7022128||Apr 22, 2003||Apr 4, 2006||Becton, Dickinson And Company||Surgical knife safety handle|
|US7172611||Mar 22, 2004||Feb 6, 2007||Becton, Dickinson And Company||Surgical scalpel assembly|
|US7308896 *||Jun 21, 2005||Dec 18, 2007||Emergency Medical Devices, Inc.||Combination tracheal hook and scalpel device|
|US7387637||Apr 21, 2004||Jun 17, 2008||Becton, Dickinson And Company||Surgical knife safety handle|
|US7857824||Sep 10, 2003||Dec 28, 2010||Southmedic Inc.||Surgical scalpel with retractable guard|
|US7901422||Mar 8, 2011||Beaver-Visitec International (Us), Inc.||Surgical knife safety handle|
|US7905894||Mar 15, 2011||Beaver-Visitec International (Us), Inc.||Surgical knife safety handle|
|US7909840||Mar 22, 2011||Beaver-Visitec International (Us), Inc.||Surgical knife safety handle having user operable lock|
|US8181352 *||May 22, 2012||Shackelford Sr Howard L||Scalpel with removable blade assembly|
|US8256330||Nov 17, 2009||Sep 4, 2012||Alcon Research, Ltd.||Guarded surgical knife handle|
|US8256331||Nov 17, 2009||Sep 4, 2012||Alcon Research, Ltd.||Guarded surgical knife handle|
|US8464430||Feb 7, 2008||Jun 18, 2013||Beaver-Visitec International (Us), Inc.||Retractable safety knife|
|US8511205 *||Dec 1, 2008||Aug 20, 2013||Dong Yool Lee||Opener|
|US8764781||Jul 24, 2012||Jul 1, 2014||Alcon Research, Ltd.||Guarded surgical knife handle|
|US8814893||Dec 22, 2010||Aug 26, 2014||Beaver-Visitec International (Us), Inc.||Surgical knife safety handle having user operable lock|
|US8834500 *||Mar 2, 2012||Sep 16, 2014||Vascular Solutions, Inc.||Hand-held vein removal device|
|US8875405 *||Apr 19, 2012||Nov 4, 2014||Oasis Medical, Inc.||Micro surgical knife with safety feature|
|US8959778 *||Apr 28, 2008||Feb 24, 2015||Poly Medicure Limited||Surgical safety scalpel|
|US8992554||May 16, 2014||Mar 31, 2015||Alcon Research, Ltd.||Guarded surgical knife handle|
|US9044265||Dec 22, 2010||Jun 2, 2015||Beaver-Visitec International (Us), Inc.||Retractable safety knife|
|US20040215174 *||Apr 22, 2003||Oct 28, 2004||Morawski Michael J.||Surgical knife safety handle|
|US20050015104 *||Apr 21, 2004||Jan 20, 2005||Morawski Michael J.||Surgical knife safety handle|
|US20050119680 *||Jan 7, 2005||Jun 2, 2005||Diamatrix Limited, Inc.||Surgical device with a moveable instrument protector|
|US20050228420 *||Mar 22, 2004||Oct 13, 2005||Becton, Dickinson And Company||Surgical scalpel assembly|
|US20050279363 *||Jun 21, 2005||Dec 22, 2005||Rafael Cruz||Combination tracheal hook and scalpel device|
|US20060085019 *||Oct 19, 2005||Apr 20, 2006||Becton, Dickinson And Company||Surgical knife safety handle having user operable lock|
|US20060100650 *||Sep 10, 2003||May 11, 2006||Kiehne Bruce L||Surgical scalpel with retractable guard|
|US20080051813 *||Sep 13, 2005||Feb 28, 2008||University Of Massachusetts||Adapter Sleeve|
|US20080058843 *||Oct 31, 2007||Mar 6, 2008||Morawski Michael J||Surgical knife safety handle|
|US20100089405 *||Apr 3, 2009||Apr 15, 2010||Tactical Medical Solutions, Inc.||Combination tracheal hook and surgical blade|
|US20100125290 *||Nov 17, 2009||May 20, 2010||Gregory Allen Auchter||Guarded surgical knife handle|
|US20100125293 *||Nov 17, 2009||May 20, 2010||Gregory Allen Auchter||Guarded surgical knife handle|
|US20100228274 *||Apr 28, 2008||Sep 9, 2010||Poly Medicure Limited||Surgical safety scalpel|
|US20110259154 *||Dec 1, 2008||Oct 27, 2011||Dong Yool Lee||Opener|
|US20120215241 *||Apr 19, 2012||Aug 23, 2012||Oasis Medical, Inc.||Micro surgical knife with safety feature|
|US20120226297 *||Mar 2, 2012||Sep 6, 2012||Vascular Device Partners Llc||Hand-held vein removal device|
|USD685091||Mar 14, 2011||Jun 25, 2013||Beaver-Vistec International (US), Inc.||Surgical knife safety handle guard|
|USD685092||Mar 14, 2011||Jun 25, 2013||Beaver-Visitec International (Us), Inc.||Surgical knife safety handle|
|USRE42507||Jun 28, 2011||Aspen Surgical Products, Inc.||Surgical scalpel|
|DE3722899A1 *||Jul 8, 1987||Jan 19, 1989||Peters Tim||Scalpel|
|EP0555196A1 *||Jan 21, 1993||Aug 11, 1993||Michael R. Abidin||Surgical scalpel with retractable guard|
|WO1992015254A1 *||Feb 27, 1992||Sep 17, 1992||Taillandier Gerard||Incision instrument of the scalpel type with blade protection means|
|WO1993011916A1 *||Dec 17, 1992||Jun 24, 1993||American Safety Razor Company||Disposable surgical scalpel with safety guard|
|WO1997029891A1 *||Feb 14, 1997||Aug 21, 1997||Noble House Group Pty. Ltd.||Cutter assembly|
|WO2004026151A1 *||Sep 10, 2003||Apr 1, 2004||Occupational & Medical Innovations Ltd||Surgical scalpel with retractable guard|
|WO2008132762A1 *||Apr 28, 2008||Nov 6, 2008||Poly Medicure Limited||A surgical safety scalpel|
|WO2009146149A2 *||Apr 6, 2009||Dec 3, 2009||Tactical Medical Solutions, Inc.||Combination tracheal hook and surgical blade|
|WO2009146149A3 *||Apr 6, 2009||Jan 21, 2010||Tactical Medical Solutions, Inc.||Combination tracheal hook and surgical blade|
|WO2013163708A1 *||May 3, 2013||Nov 7, 2013||Pacheco De Souza Fabio Andre||Micro-incision instrument|
|U.S. Classification||30/162, 30/320, 30/335, 30/339, D24/149|
|Cooperative Classification||A61B17/3215, A61B17/3217, A61B17/3213, A61B2017/32113|
|European Classification||A61B17/3213, A61B17/3215, A61B17/3217|