U.S. patent number 3,877,698 [Application Number 05/419,483] was granted by the patent office on 1975-04-15 for baseball bat with replaceable ball-striking portion.
Invention is credited to Michael A. Volpe.
United States Patent |
3,877,698 |
Volpe |
April 15, 1975 |
BASEBALL BAT WITH REPLACEABLE BALL-STRIKING PORTION
Abstract
A baseball bat has a handle with a stem joined to its front end
and extending forward from it, the stem extending into a
longitudinal bore in a removable barrel that has an outer
ballstriking surface. The diameter of the bore is greater than the
diameter of the stem, which has annular grooves spaced lengthwise
of it and containing elastic rings compressed between the stem and
the encircling barrel to hold the barrel in place and space it from
the stem.
Inventors: |
Volpe; Michael A. (Pittsburgh,
PA) |
Family
ID: |
23662469 |
Appl.
No.: |
05/419,483 |
Filed: |
November 28, 1973 |
Current U.S.
Class: |
473/520;
473/566 |
Current CPC
Class: |
A63B
60/10 (20151001); A63B 59/52 (20151001); A63B
59/50 (20151001); A63B 2102/18 (20151001) |
Current International
Class: |
A63B
59/00 (20060101); A63B 59/06 (20060101); A63b
059/06 () |
Field of
Search: |
;273/26B,67R,67D,72R,72A,73R,73C,73J,75,8R,80.7,81R,81.2,171,82R |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Apley; Richard J.
Attorney, Agent or Firm: Brown, Murray, Flick &
Peckham
Claims
I claim:
1. A composite baseball bat with a replaceable ball-striking
portion, comprising a handle having front and rear ends, a stem
joined to the front end of the handle and extending forward
therefrom, a removable barrel provided with a longitudinal bore
receiving substantially all of said stem, the diameter of said bore
being greater than the diameter of the stem to space the barrel
from the stem, the barrel having an outer ball-striking surface,
said stem being provided with a plurality of annular grooves spaced
lengthwise thereof, and elastic rings in at least most of the
grooves and projecting therefrom, said rings being compressed
between the stem and the encircling barrel to hold the barrel in
place and space it from said stem.
2. A composite baseball bat according to claim 1, in which at least
one of said grooves contains a metal weight ring instead of an
elastic ring, said weight ring being spaced from the encircling
barrel.
3. A composite baseball bat according to claim 1, in which said
elastic rings are in most of said grooves, including the two
grooves nearest the front end of the stem, and a metal weight ring
is disposed in a groove behind said two grooves and is spaced from
the encircling barrel.
4. A composite baseball bat according to claim 1, in which the
front end of the handle has a forwardly facing radial shoulder
encircling the rear end of the stem, and a resilient spacing ring
encircles the stem in engagement with said shoulder and the rear
end of the barrel.
5. A composite baseball bat according to claim 1, in which the
portions of said elastic rings that project from said grooves
before the stem is inserted in the barrel bore have rearwardly
inclined front surfaces, and the rear end of the barrel has an
inwardly tapered end wall for engaging said inclined surfaces as
the bat is assembled.
6. A composite baseball bat according to claim 1, including a metal
weight between the front ends of said stem and bore, and compressed
resilient means spacing said weight from the barrel.
7. A composite baseball bat according to claim 1, in which said
barrel is wood, and said handle and stem are made of another
material.
8. A composite baseball bat according to claim 1, in which said
barrel is a metal tube, and a rubber plug secured to the front end
of said stem closes the front end of said tube.
Description
It is not unusual for baseball bats to crack or to break, the break
usually occurring near the front end of the handle, which is the
end farther from the body of the batter. Of course, it is then
necessary to replace the entire bat. To overcome the breakage
problem, baseball bats also have been made of metal. In order that
such bats will not be too heavy, they are hollow. One objection to
metal bats is the metallic sound they produce when they strike
baseballs. Also, they often are made of metal tubing that is so
thin that it can be dented by the balls.
It is among the objects of this invention to provide a baseball bat
which will not break at the handle, which has a replaceable
ball-striking portion that can be metal or wood, which can be
balanced and weighted to suit the player and, when all metal, will
not make a hollow metallic sound when striking baseballs.
The invention is illustrated in the accompanying drawings in
which,
FIG. 1 is a side view of a bat with a wood barrel partly in
longitudinal section;
FIG. 2 is an enlarged cross section taken on the line II--II of
FIG. 1;
FIG. 3 is an enlarged fragmentary side view partly in section,
showing the handle and stem before assembly with the barrel;
and
FIG. 4 is a fragmentary longitudinal section of a modification
using a metal barrel.
Referring to FIGS. 1 to 3 of the drawings, a baseball bat handle 1
is made from a high impact unbreakable plastic or from a
light-weight metal, such as aluminum. Extending forward from the
inner or front end of the handle is a stem 2 that is rigidly joined
to the handle, preferably by being made integral with it. The major
diameter of the stem is less than the diameter of the front end of
the handle so that the handle forms a radial shoulder 3 around the
stem. This stem extends into a longitudinal bore 4 in the hitting
or ball-striking portion of the bat, referred to herein as the
barrel 5. The diameter of the bore is somewhat greater than the
diameter of the stem. As shown in FIGS. 1 and 2, the barrel is made
of wood, which may be treated in such a way as to increase its
strength and useful life.
In order to hold the barrel securely on the stem and yet permit
them to be separated when necessary, the stem is provided with a
plurality of annular grooves 7 that are spaced along it. The exact
number of grooves is not critical, but there should be a fairly
large number of them. Mounted in these grooves, or in at least most
of them, are compressible elastic rings 8 made of rubber or the
like. As shown in FIG. 3, they normally project from the grooves
far enough to require them to be compressed by the barrel when the
stem is inserted in the barrel. The rings also project far enough
and resist compression to such an extent as to require considerable
pressure to force the stem into the barrel bore as far as it will
go. The compressed rings will still project from the grooves a
short distance and will therefore space the barrel from the stem as
shown in FIG. 1. The frictional engagement of the barrel with the
rings inside of it will hold it securely on the stem but permit it
to be pulled off when sufficient force is applied.
The sides of grooves 7 preferably flare outwardly to provide areas
into which the elastic rings can bulge when they are compressed by
the barrel. As shown in FIG. 3, it also is desirable that the sides
of each ring be normally inclined outwardly toward each other and
terminate in a substantially flat outer surface. This shape of ring
aids in inserting the rings in the barrel by helping to keep the
rings from being rolled over when the stem is pushed into the
barrel, especially if the end wall of the barrel at its open end is
tapered inwardly to give it the same inclination as the sides of
the rings it engages during assembly of the bat. To prevent the
barrel from directly engaging the handle, a resilient spacing ring
9 is mounted on the stem. This ring has a flat surface engaging the
handle shoulder 3, and a tapered surface engaged by the tapered end
wall of the barrel. Consequently, no part of the barrel touches the
handle and stem.
The balance of a baseball bat is important to a ball player and
this bat can readily be balanced at any desired point along it by
substituting one or more weights for the elastic rings around the
stem. The weight is preferably composed of a split lead ring 11
that is opened sufficiently to slip it over the stem in one of the
grooves 7 and then is compressed tightly around the stem. Of
course, the periphery of this weight is spaced from the encircling
wall of the barrel. Such a weight should not be placed in either of
the grooves at the front end of the stem because elastic rings are
needed at that point to prevent the barrel from possibly canting on
the stem and coming in contact with it when the bat strikes a
ball.
To provide a heavier bat, one or more lead discs 13 can be forced
into a cup 14 of rubber or the like in the closed end of the barrel
bore. Forcing this weight into the cup, which compresses the cup
side wall against the wall of the bore, assures that both will be
securely held in place. They will also reinforce the bat at that
point. If a lighter bat is desired, a short section of an aluminum
tube can be substituted for the lead weight.
In the modification shown in FIG. 4, the barrel 16 is made
economically from a shaped metal tube that is open at both its
ends. The opening in the front or outer end of the barrel is closed
by a plug 17 of rubber or the like bonded to the end of the stem 18
inside the tube. To help in holding the plug in place, the end of
the stem can be provided with a reduced diameter extension 19 that
fits tightly in a socket in the plug. Although the barrel is made
of metal, the bat will not sound like a metal bat when it strikes a
ball because the metallic sound will be deadened by the elastic
rings 20 that are pressed tightly against the inner surface of the
barrel. If the barrel is damaged in use, it will be cheaper to
replace than a one-piece metal bat.
It will be understood that with the bat described herein, in which
there is no contact between the barrel and the stem or handle, no
jarring vibration or sting can be transmitted through the handle to
the batter when he strikes a ball. This bat can be made to have the
same impact or effect on a ball as do the wooden bats that are in
general use today. This is done by the correct choice of elastic
ring size and resiliency and the distance the rings project from
the grooves in the stem to increase or decrease the compression of
the rings and their resultant pressure against the barrel.
Many users of baseball bats, especially professional ball players,
require the bats they use to have what they describe as a certain
"feel". This is determined mostly by three elements of the bat
construction; namely, the handle diameter, the total weight of the
bat and its point of balance. The handle of this bat can be made as
small in diameter as desired and less than an all wood bat because
of the much greater strength of metal or a high impact plastic. The
grip can be improved with tape or a suitable coating and also by
forming alternate ridges and grooves around the handle. This last
procedure could make an all wood bat too weak for use. As explained
earlier herein, the weight of the bat can be increased by metal
rings 11 and/or discs 13. The location of metal weights 11 and the
elastic rings along the stem will determine the balance of the bat.
The balance of any given bat can be indicated by a mark on its
outer surface.
Even though the bat may have a metal handle, the portion of the bat
that strikes a ball can still be wood. If this portion or barrel is
damaged in use, it can be replaced without replacing the handle.
Replacing only the barrel is cheaper than replacing an entire bat
and it also conserves lumber. Since the barrel is held on the stem
solely by frictional engagement with the elastic rings, no
fastening members or adhesives are required which would complicate
the assembly of the bat and the removal of the barrel. In the case
of an individual using the bat, replacement can be made by
splitting off the damaged wood barrel and pounding a new barrel
down over the stem. On the other hand, sellers of these bats and
the ball clubs that buy them can be provided with mechanical means
for pulling the barrels off the stems and forcing new barrels onto
them. The sellers of the bats can also provide ball clubs with
charts indicating the number of weight rings and/or weight discs
required to provide a bat of any desired weight. The chart can also
show them what has to be done in order to locate the bat's point of
balance at any desired point along the length of the bat.
Even though this bat is equipped with a metal barrel, it is cheaper
to make than the present one-piece metal bats and it does not
produce the objectionable metallic sound that conventional metal
bats give off when striking baseballs.
According to the provisions of the patent statutes, I have
explained the principle of my invention and have illustrated and
described what I now consider to represent its best embodiment.
However, I desire to have it understood that, within the scope of
the appended claims, the invention may be practiced otherwise than
as specifically illustrated and described.
* * * * *