CA2559338A1 - Scalpel assembly - Google Patents
Scalpel assembly Download PDFInfo
- Publication number
- CA2559338A1 CA2559338A1 CA 2559338 CA2559338A CA2559338A1 CA 2559338 A1 CA2559338 A1 CA 2559338A1 CA 2559338 CA2559338 CA 2559338 CA 2559338 A CA2559338 A CA 2559338A CA 2559338 A1 CA2559338 A1 CA 2559338A1
- Authority
- CA
- Canada
- Prior art keywords
- assembly
- blade
- bar
- handle
- button
- 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.)
- Abandoned
Links
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
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Surgery (AREA)
- Heart & Thoracic Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Nuclear Medicine, Radiotherapy & Molecular Imaging (AREA)
- Medical Informatics (AREA)
- Molecular Biology (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Surgical Instruments (AREA)
Abstract
A scalpel assembly utilizing an ejectable blade allowing easy installation and removal of the blade. Use of an ejectable blade permits a used or contaminated blade to fall freely from the scalpel assembly without direct contact with the blade when a blade bar moving button is operational.
Description
BACKGROUND OF THE INVENTION
Field of the Invention This invention relates to a scalpel having a releasable, detachable or disposable blade and a reusable scalpel assembly.
Description of Related Art Surgical scalpels have long been available, including such devices utilizing detachable or disposable blades that have a keyed or keyhole shaped slot.
There is a need for a scalpel assembly that allows easy installation of a blade and that allows easy, safe release of a detachable or disposable blade when required and that can be manipulated with one hand.
SUMMARY OF THE INVENTION
This invention is a scalpel assembly for disposable or detachable blades ejectable with the push of a button when the button has been released. This allows a used or contaminated blade to fall freely from the scalpel assembly into a disposal receptacle, such as a sharps container, without direct contact of medical personnel with the used or contaminated blade.
A conventional disposable or detachable blade having a keyed slot is utilized and engaged by a blade bar that extends from a handle assembly. This blade bar may be extended with one hand by manipulating a push button or other actuator, releasing the blade from the handle.
The push button is located on the handle remote from the blade, so that contact between the user's fingers and the blade is unnecessary and unlikely. The push button is secured on the handle for rotation and for release for use moving the blade bar for removing a blade.
Accordingly, it is a feature of this invention to provide a scalpel assembly that allows release of a blade without requiring medical personnel to touch the blade.
It is a further feature of this invention to provide a scalpel assembly that allows release of a blade by manipulation with one hand.
Another feature of this invention is to provide a scalpel assembly that allows easy blade installation.
It is another feature of this invention to provide a scalpel assembly that is durable, and capable of withstanding repeated sterilization.
This invention can be better understood by reference to the Brief Description of the Drawings, which should not be interpreted to limit the scope thereof.
Field of the Invention This invention relates to a scalpel having a releasable, detachable or disposable blade and a reusable scalpel assembly.
Description of Related Art Surgical scalpels have long been available, including such devices utilizing detachable or disposable blades that have a keyed or keyhole shaped slot.
There is a need for a scalpel assembly that allows easy installation of a blade and that allows easy, safe release of a detachable or disposable blade when required and that can be manipulated with one hand.
SUMMARY OF THE INVENTION
This invention is a scalpel assembly for disposable or detachable blades ejectable with the push of a button when the button has been released. This allows a used or contaminated blade to fall freely from the scalpel assembly into a disposal receptacle, such as a sharps container, without direct contact of medical personnel with the used or contaminated blade.
A conventional disposable or detachable blade having a keyed slot is utilized and engaged by a blade bar that extends from a handle assembly. This blade bar may be extended with one hand by manipulating a push button or other actuator, releasing the blade from the handle.
The push button is located on the handle remote from the blade, so that contact between the user's fingers and the blade is unnecessary and unlikely. The push button is secured on the handle for rotation and for release for use moving the blade bar for removing a blade.
Accordingly, it is a feature of this invention to provide a scalpel assembly that allows release of a blade without requiring medical personnel to touch the blade.
It is a further feature of this invention to provide a scalpel assembly that allows release of a blade by manipulation with one hand.
Another feature of this invention is to provide a scalpel assembly that allows easy blade installation.
It is another feature of this invention to provide a scalpel assembly that is durable, and capable of withstanding repeated sterilization.
This invention can be better understood by reference to the Brief Description of the Drawings, which should not be interpreted to limit the scope thereof.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of one embodiment of the scalpel handle assembly of this invention.
FIG. 2 is an exploded perspective view of the handle body assembly of the scalpel assembly shown in FIG. 1.
FIG. 3 is a side elevation section view of the handle body assembly of FIG. 1.
FIG. 4 is a side elevation section view of the button assembly of FIG. 1.
FIG. 5 is a side elevation section view of the scalpel assembly of FIG. 1; and FIG. 6 is an end view of the scalpel assembly of FIG. 1.
DETAILED DESCRIPTION
This invention relates to a scalpel having an easily detachable, optionally disposable blade that can be removed by actuation of a button with the same hand holding the scalpel assembly.
The disposable or detachable scalpel blade need be handled only when it is sterile and is being attached to the scalpel assembly, if at all. In a more particular embodiment of this invention, the scalpel assembly comprises an attachment mechanism for receiving and engaging a disposable or detachable scalpel blade, and may desirably be adapted to receive and engage conventional scalpel blades. As used in the description of the scalpel assembly of this invention, a proximal end is one nearer to the blade tip and a distal end is one remote from the blade tip.
The scalpel assembly includes a handle body, which provides a surface for the surgeon or medical personnel to grip the scalpel during transport or use. A
button assembly inside the handle body serves to allow attachment and detachment of the blade from the scalpel assembly. The proximal end of the handle body terminates in a collet.
The interior surface of the distal end of the handle body is adapted to receive and engage the proximal end of the button retainer after the button assembly is inserted into the handle assembly. The button assembly is made up of a blade bar, a spring and a button. The blade bar contains a groove and heel forming a tang, which allows it to engage a blade. The proximal end of the spring engages the interior of the handle assembly, desirably toward the proximal end. For example, the spring may engage the distal end of the collet. Depression of the button compresses the spring and extends the blade bar, disengaging the blade. This invention is described below by reference to the drawings; however, it should be understood that the drawings are directed to a specific embodiment of the invention and do not limit the scope thereof.
As shown in FIGS. 1 and 2, the scalpel assembly 10 of one embodiment of this invention includes a handle body assembly 20, which has a bore 22 and a button assembly 28.
The handle body assembly 20 of this embodiment contains collet core 32. Collet core 32 is penetrated by bore 36, which provides for movement of blade bar 40 in and out of, and laterally within, collet core 32 during engaging and releasing of a blade 50 in response to depressing button 30. Collet core 32 also contains sloping front surface 38.
Distal end of collet 32 is inserted into body bore 22 at proximal end of handle body 20 with a press fit, as shown in FIG. 2.
The button assembly 28 contains blade bar 40, helical spring 44 and button 30.
As best shown in FIG. 2, proximal end of blade bar 40 contains a groove 42 extending along portions of two of the blade bar's opposed sides, and a hee145, define a tang 47 that is received in keyed slot 48 in blade 50. When tang 47 is inserted in keyed slot 48 of blade 50, the narrower portion of keyed slot 52 engages the u-shaped groove 42 of blade bar 40.
An end of blade bar 40 enters an end of coiled spring 44. Helical coiled spring 44 is telescopingly connected to the blade bar 40, so that an end of coiled spring 44 is captured by an enlarged portion 46 on blade bar 40.
FIGS. 4 and 5 illustrate how blade bar 40, coiled spring 44, and button 30 combine to form button assembly 28. Blade bar 40 is formed at an angle to allow blade 50 to be freely inserted or removed in the extended position of the scalpel assembly, and held in place on blade bar 40 upon retraction, further described below. Button assembly 28, shown in FIG. 2, is inserted into handle body 20, so that button threaded member 60 passes through button bore 62 of the button 30 and is threadedly connected to the button 30.
Retraction of blade bar 40 secures blade 50 by positioning distal end of blade within slit 39 of collet core 32, so that blade 50 is held in place on blade bar 40. Blade bar angle allows blade 50 to be inserted and removed from blade bar 40 when the handle is in an extended position, and holds blade 50 in place, coaxial with or parallel to the longitudinal axis of the handle, upon retraction.
Collet core 32 has a slit 39, which traps blade 50 upon retraction. Front surface 38 slopes toward slit 39, thereby serving to guide an end 53 of blade bar 40 into slit 39 when blade bar 40 retracts into collet core bore 36, drawing blade 50 back with it.
Helical coiled spring 44 retracts the blade bar 40, securing blade 50 in the scalpel assembly 10 while the end of spring 44 permits the above-described lateral movement of blade bar 40.
Blade 50 may be released with one hand by pressing of button 30. Depression of button 30 forces blade bar 40 out of proximal end of collet core 32 so that blade 50 is discharged from slit 39 in collet core 32 and blade 50 disengages from blade bar 40. This allows easy installation and push button ejection of blade 50.
FIG. 2 depicts a button 30 for use in the scalpel assembly of this invention.
The button assembly 28 has a threaded member 60 attached to the blade bar 40 at an end remote from the blade 50 to be threadedly received in and threadedly engage a bore 62 in the button 30. A "C" ring 70 in a groove 72 on the button 30 engages an end restriction 80 in the bore of the body 20 in order to retain the button 30 in the handle body 20. The knurled ridges 84 on the button 30 assist the rotation of the button to lock and unlock the blade bar 40. The locked position of the blade bar 40 is shown in FIG. 3 wherein the button 30 is rotated clockwise until it engages the end restriction 80 of the handle body 20.
Counter clockwise rotation of the button 30 unlocks the blade bar as shown in FIG. 5 so that the blade bar 40 moves out of the handle body 20 and disengages the blade 50.
The invention has been described by reference to specific embodiments, but is not limited to these embodiments. The invention extends to all variations and equivalents thereof within the scope of the following claims, as would be apparent to those of skill in the art.
FIG. 1 is a perspective view of one embodiment of the scalpel handle assembly of this invention.
FIG. 2 is an exploded perspective view of the handle body assembly of the scalpel assembly shown in FIG. 1.
FIG. 3 is a side elevation section view of the handle body assembly of FIG. 1.
FIG. 4 is a side elevation section view of the button assembly of FIG. 1.
FIG. 5 is a side elevation section view of the scalpel assembly of FIG. 1; and FIG. 6 is an end view of the scalpel assembly of FIG. 1.
DETAILED DESCRIPTION
This invention relates to a scalpel having an easily detachable, optionally disposable blade that can be removed by actuation of a button with the same hand holding the scalpel assembly.
The disposable or detachable scalpel blade need be handled only when it is sterile and is being attached to the scalpel assembly, if at all. In a more particular embodiment of this invention, the scalpel assembly comprises an attachment mechanism for receiving and engaging a disposable or detachable scalpel blade, and may desirably be adapted to receive and engage conventional scalpel blades. As used in the description of the scalpel assembly of this invention, a proximal end is one nearer to the blade tip and a distal end is one remote from the blade tip.
The scalpel assembly includes a handle body, which provides a surface for the surgeon or medical personnel to grip the scalpel during transport or use. A
button assembly inside the handle body serves to allow attachment and detachment of the blade from the scalpel assembly. The proximal end of the handle body terminates in a collet.
The interior surface of the distal end of the handle body is adapted to receive and engage the proximal end of the button retainer after the button assembly is inserted into the handle assembly. The button assembly is made up of a blade bar, a spring and a button. The blade bar contains a groove and heel forming a tang, which allows it to engage a blade. The proximal end of the spring engages the interior of the handle assembly, desirably toward the proximal end. For example, the spring may engage the distal end of the collet. Depression of the button compresses the spring and extends the blade bar, disengaging the blade. This invention is described below by reference to the drawings; however, it should be understood that the drawings are directed to a specific embodiment of the invention and do not limit the scope thereof.
As shown in FIGS. 1 and 2, the scalpel assembly 10 of one embodiment of this invention includes a handle body assembly 20, which has a bore 22 and a button assembly 28.
The handle body assembly 20 of this embodiment contains collet core 32. Collet core 32 is penetrated by bore 36, which provides for movement of blade bar 40 in and out of, and laterally within, collet core 32 during engaging and releasing of a blade 50 in response to depressing button 30. Collet core 32 also contains sloping front surface 38.
Distal end of collet 32 is inserted into body bore 22 at proximal end of handle body 20 with a press fit, as shown in FIG. 2.
The button assembly 28 contains blade bar 40, helical spring 44 and button 30.
As best shown in FIG. 2, proximal end of blade bar 40 contains a groove 42 extending along portions of two of the blade bar's opposed sides, and a hee145, define a tang 47 that is received in keyed slot 48 in blade 50. When tang 47 is inserted in keyed slot 48 of blade 50, the narrower portion of keyed slot 52 engages the u-shaped groove 42 of blade bar 40.
An end of blade bar 40 enters an end of coiled spring 44. Helical coiled spring 44 is telescopingly connected to the blade bar 40, so that an end of coiled spring 44 is captured by an enlarged portion 46 on blade bar 40.
FIGS. 4 and 5 illustrate how blade bar 40, coiled spring 44, and button 30 combine to form button assembly 28. Blade bar 40 is formed at an angle to allow blade 50 to be freely inserted or removed in the extended position of the scalpel assembly, and held in place on blade bar 40 upon retraction, further described below. Button assembly 28, shown in FIG. 2, is inserted into handle body 20, so that button threaded member 60 passes through button bore 62 of the button 30 and is threadedly connected to the button 30.
Retraction of blade bar 40 secures blade 50 by positioning distal end of blade within slit 39 of collet core 32, so that blade 50 is held in place on blade bar 40. Blade bar angle allows blade 50 to be inserted and removed from blade bar 40 when the handle is in an extended position, and holds blade 50 in place, coaxial with or parallel to the longitudinal axis of the handle, upon retraction.
Collet core 32 has a slit 39, which traps blade 50 upon retraction. Front surface 38 slopes toward slit 39, thereby serving to guide an end 53 of blade bar 40 into slit 39 when blade bar 40 retracts into collet core bore 36, drawing blade 50 back with it.
Helical coiled spring 44 retracts the blade bar 40, securing blade 50 in the scalpel assembly 10 while the end of spring 44 permits the above-described lateral movement of blade bar 40.
Blade 50 may be released with one hand by pressing of button 30. Depression of button 30 forces blade bar 40 out of proximal end of collet core 32 so that blade 50 is discharged from slit 39 in collet core 32 and blade 50 disengages from blade bar 40. This allows easy installation and push button ejection of blade 50.
FIG. 2 depicts a button 30 for use in the scalpel assembly of this invention.
The button assembly 28 has a threaded member 60 attached to the blade bar 40 at an end remote from the blade 50 to be threadedly received in and threadedly engage a bore 62 in the button 30. A "C" ring 70 in a groove 72 on the button 30 engages an end restriction 80 in the bore of the body 20 in order to retain the button 30 in the handle body 20. The knurled ridges 84 on the button 30 assist the rotation of the button to lock and unlock the blade bar 40. The locked position of the blade bar 40 is shown in FIG. 3 wherein the button 30 is rotated clockwise until it engages the end restriction 80 of the handle body 20.
Counter clockwise rotation of the button 30 unlocks the blade bar as shown in FIG. 5 so that the blade bar 40 moves out of the handle body 20 and disengages the blade 50.
The invention has been described by reference to specific embodiments, but is not limited to these embodiments. The invention extends to all variations and equivalents thereof within the scope of the following claims, as would be apparent to those of skill in the art.
Claims (23)
1. A handle assembly for a detachable scalpel blade having a keyed slot, the handle assembly comprising:
a) a handle body having a longitudinal bore, b) a blade bar having a portion protruding from the handle body for engaging the blade and urging the distal end of the blade into engagement with the handle body further comprising a spring for urging the bar, c) an actuator button threadedly attached to an end of the bar remote from the blade.
a) a handle body having a longitudinal bore, b) a blade bar having a portion protruding from the handle body for engaging the blade and urging the distal end of the blade into engagement with the handle body further comprising a spring for urging the bar, c) an actuator button threadedly attached to an end of the bar remote from the blade.
2. The assembly of claim 1 wherein the blade is received in a groove in the protruding portion of the bar.
3. The assembly of claim 1, wherein the spring comprises a coiled spring.
4. The assembly of claim 2, wherein the bar is bent and the groove is approximately parallel to the longitudinal axis.
5. The assembly according to claim 1, wherein the body further comprises a through bore of the same dimensions as the cross section of the bar extending therethrough and further comprising a slot for engaging the distal end of the blade.
6. The handle assembly as claimed in claim 5 wherein the spring engages the body adjacent the through bore.
7. The assembly according to any one of claims 1 to 6 further comprising a collet.
8. The assembly according to claim 7, wherein the collet further comprises a through bore within which the blade bar is disposed.
9. The assembly of claim 8, wherein the collet has a slit within which an end of the blade is received.
10. The assembly of claim 7 or 8, wherein the collet has at least one sloping face for guiding the blade into the slit.
11. The assembly of claim 10, wherein the at least one sloping face slopes toward the slit for guiding the blade end into the slit.
12. The assembly of any one of claims 8 to 11, wherein the bore is sized and shaped to permit the bar to move laterally along one axis orthogonal to the longitudinal axis.
13 The assembly of any one of claims 1 to 12, wherein the bar is coupled to an actuator for urging the protruding portion of the bar out of the handle assembly for removing the blade from the bar or mounting the blade on the bar.
14. The assembly of claim 13, wherein the actuator is a button threadedly attached to the blade bar.
15. The assembly of claim 1, wherein the handle body further comprises:
a handle grip, a collet having a proximal end, a collet core.
a handle grip, a collet having a proximal end, a collet core.
16. The assembly of claim 15, where the handle grip has a generally oval cross-sectional shape.
17. The assembly of claim 15 or 16, wherein the handle grip further comprises ribs.
18. The assembly of any of claims 15 to 17, wherein the collet flares at its proximal end.
19. The assembly of any one of claims 1, 15, 16, 17 or 18, further comprising retaining means for capturing the button within the handle body the retaining means comprising a "C"
ring on the button co-operating with a restricted portion at the end of the handle bore.
ring on the button co-operating with a restricted portion at the end of the handle bore.
20. The assembly of claim 13, further comprising a retainer for capturing the rod within the handle body.
21. The assembly of claim 20, wherein the retainer is attached to the handle body with mating threads.
22. The assembly according to any one of claims 1 to 21, wherein the blade bar further comprises a tang for insertion in the keyed slot of the blade.
23. The assembly of claim 22, wherein the tang is defined by a groove and a heel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2559338 CA2559338A1 (en) | 2006-09-08 | 2006-09-08 | Scalpel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2559338 CA2559338A1 (en) | 2006-09-08 | 2006-09-08 | Scalpel assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2559338A1 true CA2559338A1 (en) | 2008-03-08 |
Family
ID=39153681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2559338 Abandoned CA2559338A1 (en) | 2006-09-08 | 2006-09-08 | Scalpel assembly |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2559338A1 (en) |
-
2006
- 2006-09-08 CA CA 2559338 patent/CA2559338A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |