U.S. patent application number 09/769666 was filed with the patent office on 2002-07-25 for guide bushing for coring reamer, storage package for reamer assembly, and method of use.
Invention is credited to Bellafiore, Mark A., Brasfield, Andrea, Salazar, Bartolome J..
Application Number | 20020099382 09/769666 |
Document ID | / |
Family ID | 25086175 |
Filed Date | 2002-07-25 |
United States Patent
Application |
20020099382 |
Kind Code |
A1 |
Salazar, Bartolome J. ; et
al. |
July 25, 2002 |
Guide bushing for coring reamer, storage package for reamer
assembly, and method of use
Abstract
A guide bushing for a coring reamer having a tapered member with
its largest diameter at its first end so that the guide bushing
frictionally engages an internal surface of the reamer with a line
contact. The guide bushing has a passage sized to slidably receive
a guide pin. In use, the bushing advances in the proximal direction
within the coring reamer along a guide pin while the excavated bone
enters the passageway through the reamer. A storage package
specifically designed for the reamer assembly is employed to remove
the excavated bone from within the reamer. The package has a closed
distal end and an open proximal end closeable with a cap. With the
coring reamer received in cantilevered fashion through a central
opening of the cap of the tube, and with an adapter that couples
the coring reamer to a handpiece installed, a wrench is placed over
the adapter and turned while the user grips peripheral surfaces of
the cap to prevent rotation of the coring reamer. A plunger is
inserted through the opening through the coring reamer from the
proximal end and is pushed through the reamer until the bone core
and bushing fall out of the distal end of the coring reamer.
Inventors: |
Salazar, Bartolome J.;
(Alpharetta, GA) ; Brasfield, Andrea; (St.
Petersburg, FL) ; Bellafiore, Mark A.; (Clearwater,
FL) |
Correspondence
Address: |
LARSON AND LARSON
11199 69TH STREET NORTH
LARGO
FL
33773
|
Family ID: |
25086175 |
Appl. No.: |
09/769666 |
Filed: |
January 25, 2001 |
Current U.S.
Class: |
606/86R ;
606/80 |
Current CPC
Class: |
A61B 50/30 20160201;
A61B 50/3001 20160201; A61B 2050/006 20160201; A61B 17/1637
20130101 |
Class at
Publication: |
606/86 ;
606/80 |
International
Class: |
A61B 017/00 |
Claims
1. In a coring reamer including a cylindrical body with a
cylindrical passageway extending therethrough, the improvement
comprising a guide bushing having a passage extending
longitudinally therethrough, said passage being sized to slidably
receive a guide pin therethrough, said guide bushing having an
external surface tapered from a larger diameter at one end thereof
to a smaller diameter at another end thereof, said larger diameter
being equal to or less than a diameter of said passageway, whereby
said one end of said bushing engages an inner wall of said
passageway with a line contact.
2. The reamer of claim 1, wherein said one end of said bushing
comprises a distal end thereof.
3. The reamer of claim 1, wherein said passage includes a distal
termination comprising a frusto-conical surface diverging in a
distal direction thereof.
4. The reamer of claim 1, wherein said external surface of said
bushing is at least partially frusto-conical.
5. The reamer of claim 4, wherein said external surface tapers
outwardly in a proximal to distal direction.
6. The reamer of claim 2, wherein said another end of said bushing
comprises a proximal end thereof.
7. A package for storage of a coring reamer comprising a body
having a closed distal end and a proximal end having an opening
closeable by a cap, said cap having an enlarged periphery and an
opening extending therethrough, said opening in said cap having a
non-circular portion configured to non-rotatably receive a proximal
portion of a coring reamer therein.
8. The package of claim 7, wherein said body is transparent.
9. The package of claim 7, wherein said enlarged periphery includes
at least two concave surfaces facilitating gripping thereof.
10. The package of claim 7, wherein said non-circular portion is
hexagonal.
11. The package of claim 10, wherein said proximal portion is
hexagonal.
12. The package of claim 9, wherein said at least two concave
surfaces comprise four concave surfaces.
13. The package of claim 7, further including a plunger having a
stem sized to slide through a passage through a coring reamer
received through said opening.
14. A method of performing surgery including the steps of: a)
driving a guide pin into bone tissue; b) sliding a bushing over
said guide pin, said bushing having a passage extending
therethrough and an external surface tapered from a smaller
diameter at a first end thereof to a larger diameter at a second
end thereof; c) sliding a coring reamer over said bushing, said
coring reamer having a cylindrical body with a cylindrical
passageway extending therethrough and adapted to engage said second
end of said bushing; d) rotating and advancing said coring reamer
to cut a bone tunnel while said coring reamer is guided on said
guide pin by said bushing.
15. The method of claim 14, after said rotating and advancing step,
including the step of removing said guide pin and coring reamer
from said bone tissue.
16. The method of claim 15, after said removing step, including the
step of inserting a distal end of said coring reamer through an
opening of a cap of a tube receiving said coring reamer.
17. The method of claim 16, after said inserting step, including
the step of removing an adapter from a proximal end of said coring
reamer.
18. The method of claim 17, after said removing step, including the
step of inserting a plunger through said cylindrical passageway in
said coring reamer to remove said bushing and a bone core
therefrom, said bushing and bone core falling into said tube.
19. The method of claim 17, wherein said removing step includes the
steps of providing said cap with an enlarged periphery and gripping
surfaces and gripping said gripping surfaces while removing said
adapter.
20. The method of claim 19, wherein said removing step further
includes the steps of providing said opening with a non-circular
portion configured to non-rotatably receive a non-circular proximal
end of said coring reamer.
21. A method of storing and using a coring reamer comprising: (a)
providing a cylindrical tube having a closed distal end and an open
proximal end closeable with a cap; (b) the cap provided with an
opening therethrough configured to receive a distal portion of a
proximal coupling attached to a coring reamer so that the coring
reamer is non-rotatably received within the opening of the cap; and
(c) placing a coring reamer within said tube by attaching a
predetermined portion of said coring reamer to said cap opening to
thereby suspend said coring reamer in said tube in a cantilevered
manner.
22. A method according to claim 21 further comprising: (d)
providing said coring reamer with a tool attachment portion
accessible from the extension of said tube; and (e) holding said
tube with said coring reamer and attaching to said tool attachment
portion a tool.
23. A method according to claim 22 further comprising: (f)
attaching said tool to a handpiece to rotate said coring reamer to
form a bone core therein.
24. A method according to claim 23 further comprising: (g)
reattaching said coring reamer, with the bone core, to said tube
and cap opening in a cantilevered manner; (h) inserting a plunger
through a proximal end of the coring reamer through a passageway of
the coring reamer to push a bone core from a distal end of the
coring reamer; and (i) pulling the plunger from the coring reamer
so the coring reamer and bone core remain within the cylindrical
tube.
Description
BACKGROUND OF THE INVENTION
[0001] The present invention relates to a coring reamer. More
particularly, it refers to an improved guide bushing for a coring
reamer, a storage package for a coring reamer assembly, and a
method of using the coring reamer.
[0002] In the prior art, it is well known to use a coring reamer to
cut a cylindrical bone tunnel at a surgical site. The reamer is
coupled to a handpiece that rotates the reamer to facilitate
cutting a bone tunnel. For this purpose, the reamer has a
cylindrical distal end with sharp teeth formed thereon.
[0003] It is also well known to guide such a reamer by employing a
guide pin separately and previously driven into or through the bone
at the surgical site. As the reamer cuts the bone tunnel, the
reamer slides over the guide pin to guide its motion. While the
prior art contemplates an interface between the guide pin and the
reamer, one aspect of the present invention proposes an improvement
thereover.
[0004] In U.S. Pat. No. 5,423,823 to Schmieding, the guide pin has
an enlarged collar that guides the reamer over its peripheral
edges. This collar is fixedly mounted on the guide pin or
integrally formed therewith and facilitates removing the core from
the coring reamer. A prior U.S. Pat. No. 4,696,308 to Meller et al.
shows a guide pin with a cylindrical bushing having a cylindrical
exterior and a passage therethrough allowing it to be freely
slidably mounted over a guide pin. U.S. Pat. No. 5,197,967 to
Wilson teaches a trephine instrument including a reamer with a
blind passageway therethrough in which is freely slidably mounted a
piston having enlarged distal and proximal flanges with the piston
being spring biased into the distal direction. The piston is not
easily removable from the trephine and the instrument is so
designed that any bone core formed by the trephine can be removed
by leaving the core attached at one end and pulling the instrument
away so the core can be broken off at its distal end. None of this
prior art has the advantages of the subject invention.
[0005] Applicants are aware of no known prior art relating to
handling a reamed bone core other than simply pushing/pulling it
out of a reamer onto a surface. Also applicants are not aware of
any prior related to packaging suitable for storing coring reamers
and usable thereafter to facilitate removal of a bone core from the
reamer.
SUMMARY OF THE INVENTION
[0006] The present invention relates to an improved guide bushing
for a coring reamer, a storage package for the reamer assembly, and
a method of using the coring reamer. The present invention includes
the following interrelated objects, aspects and features:
[0007] (1) In a first aspect, the present invention contemplates
employing a coring reamer having a cylindrical passageway extending
completely therethrough. The coring reamer has a proximal coupling
enabling it to be coupled to an adapter which is coupled to a
handpiece such as a drill or other instrument designed to impart
rotary motion to the reamer. The distal end of the reamer includes
a set of teeth surrounding the opening extending therethrough.
[0008] (2) The present invention further contemplates a guide
bushing consisting of a tapered member having its largest diameter
at its proximal end with respect to the reamer and wherein the
guide bushing engages an internal cylindrical surface of the reamer
with a line contact at its distal end. The guide bushing has a
passage extending therethrough sized to slidably receive a guide
pin. In a preferred embodiment, the guide bushing is pre-assembled
with the coring reamer.
[0009] (3) Prior to the reamer being employed, a guide pin is
driven into a bone at the surgical site. The reamer/bushing
assembly is slid over the guide pin into contact with the bone.
Alternatively, if the bushing and reamer are not pre-assembled, the
bushing is slid over the guide pin into contact with the bone and
the reamer is advanced over the guide pin until the bushing has
entered the distal end of the passageway through the reamer.
[0010] (4) The handpiece is activated, causing the reamer to
rotate, and the surgeon applies a forward pushing force in the
distal direction, thereby causing the reamer to excavate a tunnel
in the bone. As this excavation takes place, the bushing advances
proximally within the reamer while the excavated bone enters the
passageway through the reamer with the bone material engaging the
distal surface of the bushing throughout the procedure.
[0011] (5) Once the tunnel has been formed through the bone, the
guide pin, with the reamer attached and with the excavated bone
material within the reamer, is removed from the surgical site. A
storage package specifically designed for the storing and shipping
of the reamer/bushing assembly and, in the preferred embodiment,
attaching it to a handpiece is employed to remove the excavated
bone core from within the reamer.
[0012] (6) The package includes a transparent tube having a closed
distal end and an open proximal end, with the open proximal end
being closable with a special cap having a central opening
therethrough sized to receive, in coupling relation, the proximal
coupling of the coring reamer. The proximal coupling of the coring
reamer has a polygonal or other non-circular surface at one portion
thereof that mimics a corresponding polygonal or other non-circular
surface within the opening formed within the cap. The cap has an
enlarged periphery allowing it to be gripped by the fingers of the
surgeon or other person.
[0013] (7) After the tunnel has been formed, the coring reamer is
placed through the cap of the tube, with the adapter that coupled
the coring reamer to the handpiece installed on the reamer and
extending outside the package tube. A wrench is placed over the
adapter and is turned while the user grips the peripheral surfaces
of the cap to prevent rotation of the coring reamer, thereby
allowing the adapter to be removed from the coring reamer.
Thereafter, a plunger is inserted through the opening through the
coring reamer from the proximal end thereof and is pushed
therethrough until the bone core and bushing fall out of the distal
end of the coring reamer and into the tube. Thereafter, the bone
core may be removed and the coring reamer, bushing, tube and cap
disposed of properly. It should be noted that the storage package
can be used to initially couple the coring reamer/bushing assembly
to the coupling adapter for assembly on to the handpiece.
[0014] As such, it is a first object of the present invention to
provide an improved guide bushing for a coring reamer, a storage
package for the reamer assembly, and method of using these elements
in performing surgery.
[0015] It is a further object of the present invention to provide
such a device in which the guide bushing engages an inner
cylindrical passageway through the coring reamer with a line
contact to reduce frictional interaction therebetween.
[0016] It is a further object of the present invention to provide
such a device wherein the guide bushing includes an internal
passageway sized to slidably mount the guide bushing over a guide
pin.
[0017] It is a still further object of the present invention to
provide such a device wherein a package is provided to ship the
reamer and bushing assembly to the user. Such package also is used
to facilitate removal of a bone core therefrom after the reamer
assembly has been used.
[0018] It is a still further object of the present invention to
provide such a device wherein the package includes a cap having an
enlarged periphery allowing the cap to be non-rotatably gripped by
a surgeon to allow attachment and removal of a proximal adapter
from the reamer.
[0019] It is a still further object of the present invention to
provide such a device including a plunger sized and configured to
slide though the opening through the reamer to allow removal of a
bone core and the guide bushing after the reamer has been used
[0020] These and other objects, aspects and features of the present
invention will be better understood from the following detailed
description of the preferred embodiments when read in conjunction
with the appended drawing figures.
BRIEF DESCRIPTION OF THE DRAWINGS
[0021] FIG. 1 shows an exploded perspective view of a coring reamer
and a flared bushing in accordance with the teachings of the
present invention.
[0022] FIG. 2 shows a side perspective view of the bushing.
[0023] FIG. 3 shows a side plan view of the bushing.
[0024] FIG. 4 shows a side cross-sectional view of the bushing.
[0025] FIG. 5 shows a perspective view of the coring reamer with
the flared bushing in phantom within the distal end thereof.
[0026] FIG. 6 shows a view similar to that of FIG. 5 but showing
the coring reamer extended over a guide pin.
[0027] FIG. 7 shows a view similar to that of FIG. 6 but depicting
a longitudinal cross-section through the coring reamer so that one
may view a bone core within the coring reamer that has pushed the
flared bushing in the proximal direction.
[0028] FIG. 8 shows a side perspective view of a package used to
store the reamer assembly and facilitate removal of the bone core
therefrom.
[0029] FIG. 9 shows a further perspective view with the coring
reamer being placed within the package.
[0030] FIG. 10 shows a further view with the coring reamer placed
within the package.
[0031] FIG. 11 shows a view similar to that of FIG. 10 but with the
adapter assembly used to couple the coring reamer to a handpiece
shown in its installed position.
[0032] FIG. 12 shows a wrench employed to attach and remove the
adapter from the coring reamer.
[0033] FIG. 13 shows a perspective view depicting the use of a
plunger to push a bone core and the flared bushing from within the
coring reamer.
[0034] FIG. 14 shows a perspective view similar to that of FIG. 13
but with the plunger fully inserted within the coring reamer and
the bone core and flared bushing removed therefrom.
SPECIFIC DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0035] With reference, first, to FIGS. 1-6, a coring reamer is
generally designated by the reference numeral 10 and is seen to
include an elongated cylindrical tube 11 having an open distal end
13 surrounded by peripheral teeth 15. A cylindrical passageway 17
(FIG. 7) extends completely through the reamer 10.
[0036] With further reference to FIGS. 1-6, the reamer 10 includes
a proximal end 19 consisting of a coupling 21 designed to couple
the reamer 10 to an adapter 23 (FIG. 11) designed to couple the
reamer 10 to a handpiece (not shown) adapted to rotate the reamer
10 in a manner well known to those skilled in the art. The proximal
coupling 21 includes a distal portion 25 having a hexagonal
periphery and a proximal portion 27 having a cylindrical periphery.
The interface between the adapter 23 and the proximal coupling 21
consists of a threaded interconnection (not shown).
[0037] With particular reference to FIGS. 1-4, a flared bushing is
generally designated by the reference numeral 30 and is seen to
include an outer wall 31 that is tapered from its widest dimension
33 (see FIG. 4) at the proximal end thereof to its narrowest
dimension 35 (see FIG. 4) at its distal ends Dimension 35 is
approximately equal to the cross-section of the passageway 17 to
act as a centering device. With reference to FIG. 2, a plurality of
slots 37 are provided extending distally from the proximal end 33
and a conical surface 39 defines the most proximal portion of a
passage 38 extending centrally through the bushing 30. The conical
surface 39 is a "lead-in" which facilitates alignment of plunger 80
with bushing 30 as will be understood below with reference to FIG.
13. The diameter of the outer wall 31 at the proximal end 33 of the
bushing 30 is sized to facilitate slidable receipt of the bushing
30 within the passageway 17 through the reamer 10 in such a manner
that the end 33 of the bushing 30 frictionally engages the
passageway 17 of the reamer 10 with a line contact. When the
longitudinal axis 32 (FIG. 3) of the bushing 30 is aligned with the
longitudinal axis of the reamer 10, only the end 33 of the bushing
30 engages the inner walls of the passageway 17 of the reamer
10.
[0038] With particular reference to FIGS. 6 and 7, as understood by
those skilled in the art, the guide pin 40 is driven into a bone
surface at the surgical site where the surgeon desires to create a
bone tunnel. The bushing 30 is slidably received over the guide pin
40 and the reamer 10 is advanced over the guide pin 40 until the
bushing 30 is inserted just within the distal end thereof as seen
in FIG. 6. In this configuration, the reamer 10 is advanced in the
distal direction of the guide pin 40 until the teeth 15 of the
reamer 10 engage the surface of the bone where the tunnel is to be
created. In the preferred embodiment, the bushing is pre-assembled
with the reamer and is shipped to the user in this
configuration.
[0039] The handpiece (not shown) is then activated and the surgeon
advances the reamer 10 in the distal direction to cause a bone
tunnel to be created in the bone (not shown). As this process is
taking place, the reamer 10 advances in the distal direction
relative to the bushing 30 as seen in FIG. 7. The bone core 1
created through action of the reamer 10 advancing in the distal
direction occupies the passageway 17 of the reamer 10, the bone
core thereby pushing the bushing 30 in the proximal direction as
shown in FIG. 7. The line contact between the proximal end 33 of
the bushing 30 and the walls of the passageway 17 create a minimal
amount of frictional interaction therebetween, thereby requiring
the surgeon to use a minimal amount of force necessary to advance
the reamer 10 within the bone tissue to cut the tunnel
therewithin.
[0040] Once the tunnel has been created through the bone, the pin
40 is removed from the bone with the coring reamer 10 attached
thereto. Thereafter, the pin 40 is pulled out from the reamer 10
leaving the reamer 10 with the bone core 1 and the bushing 30
captured therewithin. At this point, the package described
hereinabove is employed. (As will be understood below, the package
is used in the preferred embodiment to ship the reamer/bushing
assembly and attach it to the handpiece.)
[0041] With reference, now, to FIGS. 8-14, the package for the
coring reamer is generally designated by the reference numeral 50
and is seen to include a transparent tube 51 having a closed distal
end 53 and an open proximal end 55 closable by a cap 57 having a
distal cylindrical portion 59 receivable within the open end 55,
and a proximal gripping portion 61 having an enlarged periphery
with a plurality of concavities 63 in the preferred embodiment for
best facilitating gripping of the gripping portion by the fingers
of the user for a purpose to be described in greater detail
hereinafter.
[0042] With reference to FIGS. 8 and 9, in particular, the cap 57
has an opening 69 therethrough which, at least at the proximal end
thereof, has a hexagonal configuration 65 sized and configured to
receive the distal hexagonal portion 25 of the proximal coupling 21
of the coring reamer 10 for a purpose to be described in greater
detail hereinafter. Opening 69 is tapered distally to provide a
friction fit to hold the reamer 10 during shipment.
[0043] As seen in FIGS. 9 and 10, when viewed together, the coring
reamer 10 is received within the opening 69 of the cap 57 but with
the distal hexagonal portion 25 of the proximal coupling 21 thereof
received within the hexagonal configuration 65 in the cap 57. In
this way, the coring reamer 10 containing bushing 30, is
non-rotatably received within the opening 69 of the cap 57 and
suspended in tube 51 in a cantilevered manner.
[0044] With reference to FIG. 11, the coring reamer 10 is seen with
the adapter 23 threadably coupled thereto, which adapter 23 is
adapted to couple the coring reamer 10 to a handpiece (not shown)
in a manner well known to those skilled in the art. The
configuration of FIG. 11 represents two situations: (1) the initial
joining of the adapter to the reamer/bushing/package assembly prior
to attachment of the adapter to a handpiece, and (2) the
post-tunnel-formation configuration in which the
reamer/bushing/bone/adapter assembly (after disconnection from the
handpiece)is placed in the package for further disassembly. In the
former situation, when the adapter 23 and reamer 10 are coupled to
the handpiece, the package 50 is removed. With reference to FIG.
12, a wrench 70 has an elongated shape with a central hexagonal
opening 71 sized to couple to a hexagonal portion 24 of the adapter
23. Thus, it should be understood that with the coring reamer 10
non-rotatably received within the cap 57, the user may grip the
concave portions 63 of the cap 57 to thereby fix the rotative
position of the coring reamer 10, whereupon the wrench 70 may be
rotated to attach or remove the adapter 23 from the coring reamer
10, as needed.
[0045] With the coring reamer 10 freed of the adapter 23, as
depicted in FIGS. 9, 10, 13 and 14, a plunger 80 may be used to
remove the bone core 1 and the bushing 30 from within the reamer
10. The plunger 80 includes an elongated stem 81 and a proximal
gripping portion 83 (FIGS. 13 and 14). The plunger 80 is inserted
through the proximal end of the reamer assembly as shown in FIG. 13
and is advanced in the distal direction through the passageway 17
of the coring reamer 10 to engage bushing 30 (as facilitated by
"lead-in" 39) to push the bone core 1 and the flared bushing 30
from the distal end of the reamer 10. The "lead-in" surface 39
centers the pushing force relative to the bone core. This is
depicted in FIG. 14 which shows the bone core 1 and the bushing 30
captured within the tube 51. The plunger 80 may then be pulled
proximally from the coring reamer 10 and the coring reamer 10,
bushing 30 and bone core 1 all remain stored within the tube 51
until the core is ready for use.
[0046] With the above description of the coring reamer 10 and the
package 50 having been described in detail, the method of
practicing the present invention should be self-evident.
[0047] In summary, the following steps are employed:
[0048] (1) The pin 40 is driven into a bone tissue (not shown).
[0049] (2) Thereafter, the reamer/bushing assembly is advanced over
the guide pin, or alternatively, the bushing 30 is advanced over
the pin 40 and the coring reamer 10 is advanced over the pin until
the bushing 30 is received within the distal end of the reamer 10
(FIGS. 5 and 6).
[0050] (3) Thereafter, the coring reamer 10 is coupled to a
handpiece via an adapter 23 (FIG. 11) and the handpiece is
activated rotating the reamer so that, while guided by the guide
pin 40 and the bushing 30, a tunnel is created within the bone
tissue with a bone core being generated and received within the
passageway 17 through the coring reamer 10 as the reamer 10
advances into the bone tissue (FIG. 7).
[0051] (4) Once the bone tunnel has been created, the pin 40 and
the reamer 10 including the bone core 1 and the flared bushing 30
are removed from the bone tissue. The pin 40 is removed from the
reamer 10 and the reamer 10 is installed in the package through the
opening 69 within the cap 57 of the package assembly 50.
[0052] (5) The wrench 70 is used to remove the adapter 23 from the
coring reamer 10 while the user grips the surfaces 63 of the cap 57
of the package assembly 50.
[0053] (6) Thereafter, the plunger 80 is inserted through the
proximal end of the coring reamer 10 and is advanced through the
passageway 17 removing the bone core 1 and the bushing 30 from the
distal end thereof.
[0054] (7) Thereafter, the coring reamer 10, the bushing 30 and
package 50 may be disposed of properly while bone core may be used
as desired.
[0055] As mentioned above, package assembly 50 also can be used to
ship and store the coring reamer and bushing prior to use. If so,
adapter 23 is applied to the coring reamer 10 by wrench 70 as shown
in FIGS. 11 and 12. After use, the coring reamer, bushing and bone
core are returned to the same package for disassembly.
[0056] The reamer, bushing and package are intended to be
disposable. The reamer and bushing are preassembled and shipped
within the package. Therefore, the user simply needs to attach the
adapter to the proximal end of the reamer and attach the entire
assembly (adapter, reamer, bushing and package) onto the handpiece,
and then the package may be removed. This prevents anyone from
having to touch the reamer and also prevents the reamer from being
accidentally dropped or nicked or otherwise detrimentally affected.
Prepackaging of the bushing within the reamer is done with a
fixture (not shown) which squeezes the proximal end 33 of the
bushing. This prevents the reamer from scraping the surface of the
bushing which might create particulate matter. Shipping the bushing
within the reamer prevents the user from ever having to assemble
these pieces.
[0057] An invention has been disclosed in terms of apparatuses and
process for their practice which fulfill each and every one of the
objects of the invention as set forth hereinabove, and provide a
new and useful guide bushing for coring reamer, storage package for
reamer assembly, and method of using, of great novelty and
utility.
[0058] Of course, various changes, modifications and alterations in
the teachings of the present invention may be contemplated by those
skilled in the art without departing from the intended spirit and
scope thereof.
[0059] As such, it is intended that the present invention only be
limited by the terms of the appended claims.
* * * * *