US20030093100A1 - Surgical knife - Google Patents
Surgical knife Download PDFInfo
- Publication number
- US20030093100A1 US20030093100A1 US09/992,388 US99238801A US2003093100A1 US 20030093100 A1 US20030093100 A1 US 20030093100A1 US 99238801 A US99238801 A US 99238801A US 2003093100 A1 US2003093100 A1 US 2003093100A1
- Authority
- US
- United States
- Prior art keywords
- sheath
- handle
- blade
- blade end
- surgical knife
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3209—Incision instruments
- A61B17/3211—Surgical scalpels, knives; Accessories therefor
- A61B17/3213—Surgical scalpels, knives; Accessories therefor with detachable blades
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B17/00—Surgical instruments, devices or methods, e.g. tourniquets
- A61B17/32—Surgical cutting instruments
- A61B17/3209—Incision instruments
- A61B17/3211—Surgical scalpels, knives; Accessories therefor
- A61B2017/32113—Surgical scalpels, knives; Accessories therefor with extendable or retractable guard or blade
Definitions
- This invention relates generally to the field of surgical knives and, more particularly, to ophthalmic surgical knives.
- a variety of surgical knives may be used during ophthalmic surgery to make or modify the opening incision into the globe. These knives are generally made from stainless steel or diamond. While steel knives can be used more than once, most steel knives are intended to be a single use disposable product. Diamond knives are designed to be a reusable item because diamond knives are expensive relative to steel knives.
- U.S. Pat. No. 5,254,128 discloses a knife with an extendable sleeve that may be alternatively moved to protect the blade or retracted to expose the blade for use.
- the locking mechanism for this sleeve is disclosed as being either a screw thread or a spring-loaded ball that locks within a groove.
- This patent also mentions the use of a bowed leaf spring attached at both ends with a projection that snaps into a groove.
- the screw thread embodiment of this invention requires the use of two hands to operate and restricts cleaning and sterilization procedures.
- the spring-loaded ball is expensive and complicate to manufacture, and the bowed spring does not allow for independent adjustment of opening and closing force.
- the present invention improves upon the prior art by providing a knife having a handle into which a knife blade may be inserted.
- the blade end of the handle is of reduced diameter and contains a pair of spring-like cantilevered locking arms.
- the locking arms terminate in a clasping mechanism that interact with a latch contained within a bore in a sheath.
- the bore is sized and shaped to reciprocate linearly over the blade end of the handle so as to alternatively cover the blade for storage or expose the blade for use.
- one objective of the present invention is to provide a knife having a handle with a pair of spring-like cantilevered locking arms.
- Another objective of the present invention is to provide a knife having a reciprocating sheath that alternatively covers the blade for storage or exposes the blade for use.
- FIG. 1 is an exploded perspective view of the surgical knife of the present invention.
- FIG. 2 is a cross-sectional view of the sheath used with the surgical knife of the present invention.
- FIG. 3 is a cross-sectional view of the blade end of the handle used with the surgical knife of the present invention.
- FIG. 4 is a perspective view of the surgical knife of the present invention showing the sheath retracted, exposing the blade.
- FIG. 5 is a perspective view of the surgical knife of the present invention showing the sheath extended, covering the blade.
- knife 10 of the present invention generally includes sheath 12 , blade 14 and handle 16 .
- Blade 14 may be any suitable surgical blade made, for example, from stainless steel, titanium, diamond or diamond-coated substrate, such blades being well-known in the art.
- Sheath 12 and handle 14 preferably are made from injection-molded thermoplastic, but may also be made from other plastics, stainless-steel or titanium.
- Sheath 12 preferably contains ribs or knurling 18 to make sheath 12 easier to grip.
- Sheath 12 is tube-like and defines bore 20 that is sized and shaped to reciprocate linearly over blade end 22 of handle 16 .
- spring latch 24 and ramp 26 projecting into bore 20 from sheath 12 is spring latch 24 and ramp 26 . Latch 24 and ramp 26 interact with clasp 28 on blade end 22 of handle 16 in the manner discussed below.
- Handle 16 preferably is rod-like having blade end 22 and gripping end 30 opposite blade end 22 .
- Gripping end 30 may contain a plurality of ridges 34 to allow handle 16 to be gripped more easily.
- blade end 22 is of slightly reduced diameter relative to gripping end 30 and contains bore 32 that is sized and shaped to receive blade 14 .
- the diameter of blade end 22 is sized so that blade end 22 will linearly reciprocate within bore 20 of sheath 12 .
- Projecting outwardly from blade end 22 of handle 16 are spring-like cantilevered locking arms 36 and 38 of clasp 28 . Locking arms 36 and 38 contain detents 40 and 42 , and locking pins 44 and 46 , respectively.
- blade 14 is mounted within bore 32 of blade end 22 of handle 16 and fix by any suitable method, such as an adhesive.
- Sheath 12 is slid or threaded over blade end 22 of handle 16 until latch 24 contacts locking pin 46 . Pushing sheath 12 with additional force cause latch 24 to ride up and over pin 46 and into detent 42 because of the spring-like construction of latch 24 and locking arm 38 . With latch 24 held within detent 42 , sheath 12 extends out and away from handle 16 , thereby covering blade 14 , as best seen in FIG. 5.
- sheath 12 may be extended by pushing forwardly (away from gripping end 30 and toward blade end 22 of handle 16 ) on sheath 12 , causing latch 24 to ride up and out of detent 40 , along locking arms 38 and 36 and into detent 42 .
- locking arms 36 and 38 and detents 40 and 42 may be varied to provide for different locking forces and different forces when extending or retracting sheath 12 .
- detent 42 may be deeper and locking arm 38 may provide for more force so that sheath 12 is not easily accidentally retracted, exposing blade 14 .
Abstract
Description
- This invention relates generally to the field of surgical knives and, more particularly, to ophthalmic surgical knives.
- A variety of surgical knives may be used during ophthalmic surgery to make or modify the opening incision into the globe. These knives are generally made from stainless steel or diamond. While steel knives can be used more than once, most steel knives are intended to be a single use disposable product. Diamond knives are designed to be a reusable item because diamond knives are expensive relative to steel knives.
- There has been increasing interest in developing a reusable or limited reusable steel knife. One of the problems of developing such a knife is the damage that the unprotected knife blade might receive when being resterilizing between uses. Various knife guards are available, but have proven to be unsatisfactory.
- For example, U.S. Pat. No. 5,254,128 discloses a knife with an extendable sleeve that may be alternatively moved to protect the blade or retracted to expose the blade for use. The locking mechanism for this sleeve is disclosed as being either a screw thread or a spring-loaded ball that locks within a groove. This patent also mentions the use of a bowed leaf spring attached at both ends with a projection that snaps into a groove. The screw thread embodiment of this invention requires the use of two hands to operate and restricts cleaning and sterilization procedures. The spring-loaded ball is expensive and complicate to manufacture, and the bowed spring does not allow for independent adjustment of opening and closing force.
- Accordingly, a need continues to exist for a surgical knife having a retractable blade guard that is simple and inexpensive to manufacture and that can be operated with only one hand.
- The present invention improves upon the prior art by providing a knife having a handle into which a knife blade may be inserted. The blade end of the handle is of reduced diameter and contains a pair of spring-like cantilevered locking arms. The locking arms terminate in a clasping mechanism that interact with a latch contained within a bore in a sheath. The bore is sized and shaped to reciprocate linearly over the blade end of the handle so as to alternatively cover the blade for storage or expose the blade for use.
- Accordingly, one objective of the present invention is to provide a knife having a handle with a pair of spring-like cantilevered locking arms.
- Another objective of the present invention is to provide a knife having a reciprocating sheath that alternatively covers the blade for storage or exposes the blade for use.
- These and other advantages and objectives of the present invention will become apparent from the detailed description and claims that follow.
- FIG. 1 is an exploded perspective view of the surgical knife of the present invention.
- FIG. 2 is a cross-sectional view of the sheath used with the surgical knife of the present invention.
- FIG. 3 is a cross-sectional view of the blade end of the handle used with the surgical knife of the present invention.
- FIG. 4 is a perspective view of the surgical knife of the present invention showing the sheath retracted, exposing the blade.
- FIG. 5 is a perspective view of the surgical knife of the present invention showing the sheath extended, covering the blade.
- As seen in FIG. 1,
knife 10 of the present invention generally includessheath 12,blade 14 andhandle 16.Blade 14 may be any suitable surgical blade made, for example, from stainless steel, titanium, diamond or diamond-coated substrate, such blades being well-known in the art. Sheath 12 andhandle 14 preferably are made from injection-molded thermoplastic, but may also be made from other plastics, stainless-steel or titanium. Sheath 12 preferably contains ribs or knurling 18 to makesheath 12 easier to grip.Sheath 12 is tube-like and definesbore 20 that is sized and shaped to reciprocate linearly overblade end 22 ofhandle 16. As best seen in FIG. 2, projecting intobore 20 fromsheath 12 isspring latch 24 and ramp 26. Latch 24 andramp 26 interact withclasp 28 onblade end 22 ofhandle 16 in the manner discussed below. -
Handle 16 preferably is rod-like havingblade end 22 and grippingend 30opposite blade end 22. Grippingend 30 may contain a plurality ofridges 34 to allowhandle 16 to be gripped more easily. As best seen in FIG. 3,blade end 22 is of slightly reduced diameter relative to grippingend 30 and containsbore 32 that is sized and shaped to receiveblade 14. The diameter ofblade end 22 is sized so thatblade end 22 will linearly reciprocate withinbore 20 ofsheath 12. Projecting outwardly fromblade end 22 ofhandle 16 are spring-like cantilevered lockingarms clasp 28. Lockingarms detents pins - In use,
blade 14 is mounted withinbore 32 ofblade end 22 ofhandle 16 and fix by any suitable method, such as an adhesive. Sheath 12 is slid or threaded overblade end 22 ofhandle 16 until latch 24contacts locking pin 46. Pushingsheath 12 with additional force causelatch 24 to ride up and overpin 46 and into detent 42 because of the spring-like construction oflatch 24 and lockingarm 38. Withlatch 24 held within detent 42,sheath 12 extends out and away fromhandle 16, thereby coveringblade 14, as best seen in FIG. 5. Additional linear force onsheath 12 will causelatch 24 to ride up out of detent 42 and ride along lockingarms latch 24 engages detent 40, thereby holdingsheath 12 closer to grippingend 30 ofhandle 16 and exposingblade 14, as best seen in FIG. 4.Pin 44 andridge 48 onhandle 16 prevent additional rearward movement ofsheath 12. Withsheath 12 in the most rearward position shown in FIG. 4,locking arm 38 and lockingpin 46 are compressed byramp 26 inbore 20. Such compression firmly engagessheath 12 onhandle 16 and helps prevent rocking or wobbling ofsheath 12 onhandle 16 withblade 14 is exposed, allowingknife 10 to be held bysheath 12 during use.Sheath 12 may be extended by pushing forwardly (away from grippingend 30 and towardblade end 22 of handle 16) onsheath 12, causinglatch 24 to ride up and out of detent 40, along lockingarms - An important aspect of the present invention is that the size and shape of locking
arms sheath 12. For example,detent 42 may be deeper and lockingarm 38 may provide for more force so thatsheath 12 is not easily accidentally retracted, exposingblade 14. - This description is given for purposes of illustration and explanation. It will be apparent to those skilled in the relevant art that changes and modifications may be made to the invention described above without departing from its scope or spirit.
Claims (9)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US09/992,388 US6569175B1 (en) | 2001-11-14 | 2001-11-14 | Surgical knife |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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US09/992,388 US6569175B1 (en) | 2001-11-14 | 2001-11-14 | Surgical knife |
Publications (2)
Publication Number | Publication Date |
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US20030093100A1 true US20030093100A1 (en) | 2003-05-15 |
US6569175B1 US6569175B1 (en) | 2003-05-27 |
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ID=25538282
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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US09/992,388 Expired - Lifetime US6569175B1 (en) | 2001-11-14 | 2001-11-14 | Surgical knife |
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Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2007228989A (en) * | 2006-02-27 | 2007-09-13 | Feather Safety Razor Co Ltd | Cutter with protection cover |
JP2007236452A (en) * | 2006-03-06 | 2007-09-20 | Feather Safety Razor Co Ltd | Knife for medical use |
US20070266569A1 (en) * | 2006-05-16 | 2007-11-22 | Leatherman Tool Group, Inc. | Fixed knife and knife sheath |
WO2008132762A1 (en) * | 2007-04-26 | 2008-11-06 | Poly Medicure Limited | A surgical safety scalpel |
EP1990140A1 (en) * | 2006-02-27 | 2008-11-12 | Feather Safety Razor Co., Ltd. | Edged tool |
US20120215241A1 (en) * | 2010-04-09 | 2012-08-23 | Oasis Medical, Inc. | Micro surgical knife with safety feature |
WO2013158532A1 (en) | 2012-04-19 | 2013-10-24 | Oasis Medical, Inc. | Micro surgical knife with safety feature |
CN104622629A (en) * | 2015-02-13 | 2015-05-20 | 苏州贝尔一锋医疗器械有限公司 | Sclera puncture knife |
US20170333031A1 (en) * | 2016-05-18 | 2017-11-23 | Salem Afif Al-Haqan | Suture holding sleeve for laparoscopic instruments |
US10773370B1 (en) * | 2017-01-02 | 2020-09-15 | Ronald R. Warzecha | Sanitary knife |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6884240B1 (en) * | 2001-12-07 | 2005-04-26 | Ronald Dykes | Protection system for surgical instruments |
US7387742B2 (en) * | 2002-03-11 | 2008-06-17 | Becton, Dickinson And Company | Silicon blades for surgical and non-surgical use |
AU2003231967B2 (en) * | 2002-03-11 | 2006-10-12 | Beaver-Visitec International (Us), Inc. | System and method for the manufacture of surgical blades |
US20050155955A1 (en) * | 2003-03-10 | 2005-07-21 | Daskal Vadim M. | Method for reducing glare and creating matte finish of controlled density on a silicon surface |
US20090007436A1 (en) * | 2003-03-10 | 2009-01-08 | Daskal Vadim M | Silicon blades for surgical and non-surgical use |
US7022128B2 (en) | 2003-04-22 | 2006-04-04 | Becton, Dickinson And Company | Surgical knife safety handle |
TW200509851A (en) * | 2003-04-22 | 2005-03-16 | Becton Dickinson Co | Surgical knife safety handle |
US20050033338A1 (en) * | 2003-06-19 | 2005-02-10 | Ferree Bret A. | Surgical instruments particularly suited to severing ligaments and fibrous tissues |
EP1662970A2 (en) * | 2003-09-17 | 2006-06-07 | Becton, Dickinson and Company | System and method for creating linear and non-linear trenches in silicon and other crystalline materials with a router |
US7396484B2 (en) * | 2004-04-30 | 2008-07-08 | Becton, Dickinson And Company | Methods of fabricating complex blade geometries from silicon wafers and strengthening blade geometries |
TWM267092U (en) * | 2004-09-13 | 2005-06-11 | Chuen-Bo Huang | Thread ware for seal of windshield |
TWI369970B (en) | 2004-10-20 | 2012-08-11 | Beaver Visitec Int Us Inc | Surgical knife safety handle having user operable lock |
US8114103B2 (en) * | 2005-09-14 | 2012-02-14 | James Edwin Rasco | Scalpel blade protector |
US20090131963A1 (en) * | 2005-09-14 | 2009-05-21 | James Edwin Rasco | Scalpel blade protector |
US8464430B2 (en) * | 2008-02-07 | 2013-06-18 | Beaver-Visitec International (Us), Inc. | Retractable safety knife |
US8256331B2 (en) | 2008-11-20 | 2012-09-04 | Alcon Research, Ltd. | Guarded surgical knife handle |
US8256330B2 (en) * | 2008-11-20 | 2012-09-04 | Alcon Research, Ltd. | Guarded surgical knife handle |
US20100146799A1 (en) * | 2008-12-12 | 2010-06-17 | Unique Technologies Inc. | Guarded Surgical Knife |
US9247954B2 (en) * | 2010-04-21 | 2016-02-02 | Ravi Nallakrishnan Revocable Trust | Safety knife with retractable and extendable blade and guard |
US8685051B2 (en) * | 2010-04-22 | 2014-04-01 | Ojo, Llc | Capsulotomy devices and methods |
US10123815B2 (en) | 2015-02-13 | 2018-11-13 | Precision Engineered Products, Llc | Surgical knife |
US10525605B2 (en) * | 2017-04-06 | 2020-01-07 | Slice, Inc. | Cutting device |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2390309A (en) | 1944-03-13 | 1945-12-04 | Theodore F Keys | Piercer |
US4576164A (en) | 1983-11-14 | 1986-03-18 | Richeson W George | Knife with locking shroud |
US4735202A (en) | 1986-10-06 | 1988-04-05 | Alcon Laboratories, Inc. | Microsurgical knife with locking blade guard |
US5254128A (en) | 1990-10-11 | 1993-10-19 | Micro Engineering, Inc. | Surgical knife with attached, movable blade protector |
US5309641A (en) * | 1991-12-18 | 1994-05-10 | American Safety Razor Company | Disposable surgical scalpel with safety guard |
-
2001
- 2001-11-14 US US09/992,388 patent/US6569175B1/en not_active Expired - Lifetime
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100137894A1 (en) * | 2006-02-27 | 2010-06-03 | Feather Safety Razor Co., Ltd | Edged tool |
JP2007228989A (en) * | 2006-02-27 | 2007-09-13 | Feather Safety Razor Co Ltd | Cutter with protection cover |
EP1990140A1 (en) * | 2006-02-27 | 2008-11-12 | Feather Safety Razor Co., Ltd. | Edged tool |
EP1990140A4 (en) * | 2006-02-27 | 2010-03-03 | Feather Safety Razor Co Ltd | Edged tool |
JP2007236452A (en) * | 2006-03-06 | 2007-09-20 | Feather Safety Razor Co Ltd | Knife for medical use |
US20070266569A1 (en) * | 2006-05-16 | 2007-11-22 | Leatherman Tool Group, Inc. | Fixed knife and knife sheath |
US7434316B2 (en) | 2006-05-16 | 2008-10-14 | Leatherman Tool Group, Inc. | Fixed knife and knife sheath |
US20100228274A1 (en) * | 2007-04-26 | 2010-09-09 | Poly Medicure Limited | Surgical safety scalpel |
WO2008132762A1 (en) * | 2007-04-26 | 2008-11-06 | Poly Medicure Limited | A surgical safety scalpel |
US8959778B2 (en) | 2007-04-26 | 2015-02-24 | Poly Medicure Limited | Surgical safety scalpel |
US20120215241A1 (en) * | 2010-04-09 | 2012-08-23 | Oasis Medical, Inc. | Micro surgical knife with safety feature |
US8875405B2 (en) * | 2010-04-09 | 2014-11-04 | Oasis Medical, Inc. | Micro surgical knife with safety feature |
WO2013158532A1 (en) | 2012-04-19 | 2013-10-24 | Oasis Medical, Inc. | Micro surgical knife with safety feature |
EP2838449A4 (en) * | 2012-04-19 | 2015-05-06 | Oasis Medical Inc | Micro surgical knife with safety feature |
CN104622629A (en) * | 2015-02-13 | 2015-05-20 | 苏州贝尔一锋医疗器械有限公司 | Sclera puncture knife |
US20170333031A1 (en) * | 2016-05-18 | 2017-11-23 | Salem Afif Al-Haqan | Suture holding sleeve for laparoscopic instruments |
US10773370B1 (en) * | 2017-01-02 | 2020-09-15 | Ronald R. Warzecha | Sanitary knife |
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