U.S. patent application number 09/810582 was filed with the patent office on 2002-06-13 for baseball bat with a ball-serving device.
Invention is credited to Liu, Chao-Jih.
Application Number | 20020072436 09/810582 |
Document ID | / |
Family ID | 21676029 |
Filed Date | 2002-06-13 |
United States Patent
Application |
20020072436 |
Kind Code |
A1 |
Liu, Chao-Jih |
June 13, 2002 |
Baseball bat with a ball-serving device
Abstract
A baseball bat includes a tubular bat body with a resilient
member, a ball-pushing unit which is disposed within the bat body,
a gripping rod that retains the ball-pushing unit within the bat
body, and an adjustment member that is coupled with the gripping
rod. The resilient member is formed with a retaining projection
that engages a hole in the ball-pushing unit. The resilient member
can be actuated to separate the projection from the hole so that
the ball-pushing unit is biased by a spring to move quickly in the
bat body, thereby shooting a ball from an opening in an end of the
bat body. When it is desired to perform a subsequent ball serving
action, an adjustment member is pulled out from the bat body so as
to engage the retaining projection with the hole, after which the
adjustment member is returned to its normal position on the bat
body.
Inventors: |
Liu, Chao-Jih; (Taiwan,
CN) |
Correspondence
Address: |
OSTROLENK FABER GERB & SOFFEN
1180 AVENUE OF THE AMERICAS
NEW YORK
NY
100368403
|
Family ID: |
21676029 |
Appl. No.: |
09/810582 |
Filed: |
March 16, 2001 |
Current U.S.
Class: |
473/457 |
Current CPC
Class: |
A63B 69/407 20130101;
A63B 2208/12 20130101; A63B 69/0002 20130101; A63B 2069/0008
20130101; A63B 2102/18 20151001; A63B 59/50 20151001 |
Class at
Publication: |
473/457 |
International
Class: |
A63B 069/00 |
Foreign Application Data
Date |
Code |
Application Number |
Dec 13, 2000 |
CN |
089221648 |
Claims
I claim:
1. A baseball bat comprising: a tubular bat body having a barrel
portion, a grip portion extending axially from an end of said
barrel portion, and a ball-shooting opening formed in the other end
of said barrel portion, said barrel portion defining an
accommodating space therein, said bat body further including an
integral resilient member which is formed with a retaining
projection that is biased to move in a radial direction of said bat
body; a ball-pushing unit disposed within said accommodating space
in said bat body and including a bowl-shaped ball-receiving element
that is adapted to receive a baseball therewithin, and a push rod
unit which has an outer end that is connected fixedly to said
ball-receiving element, and an inner end that is provided with a
fixed retaining seat, said push rod unit being formed with a guide
slot that extends along length thereof and that has an outer end
and an inner end, said retaining seat having a slide slot, within
which said resilient member of said tubular bat body is received
slidably, and a hole, which is communicated with said slide slot
and which engages said retaining projection of said resilient
member, thereby positioning said ball-pushing unit within said bat
body; means for guiding said ball-pushing unit to move axially
within said bat body; a gripping rod retained at a retracted
position relative to said bat body and having a wide rod portion
disposed within said grip portion of said bat body, a narrow rod
portion disposed within said push rod unit of said ball-pushing
unit, a limiting shoulder defined between said wide and narrow rod
portions and abutting against said inner end of said push rod unit,
and a gripping portion formed on said narrow rod portion and
retained slidably within said guide slot in said push rod unit so
as to limit movement of said gripping portion between said inner
and outer ends of said guide slot, thereby retaining said
ball-pushing unit on said gripping rod; a coiled compression spring
sleeved on said wide rod portion of said gripping rod and disposed
between said ball-pushing unit and said bat body so as to bias said
ball-pushing unit away from said gripping rod when said resilient
member is actuated to remove said retaining projection of said
resilient member from said hole in said retaining seat, thereby
pushing the baseball from said ball shooting opening in said bat
body; and an adjustment member connected removably to said gripping
rod in such a manner that, after said retaining projection of said
resilient member has been removed from said hole in said retaining
seat, said adjustment element can move relative to said bat body so
that said resilient member slides within said slide slot in said
retaining seat of said push rod unit of said ball-pushing unit,
thereby engaging said retaining projection of said resilient member
with said hole in said retaining seat and consequently permitting
subsequent ball pushing action of said ball-pushing unit.
2. The baseball bat as claimed in claim 1, wherein said push rod
unit includes an inner rod that is formed with said guide slot
therethrough, and an outer tube that is disposed around said inner
tube, each of said inner rod and said outer tube having an end that
is connected fixedly to said ball-receiving element, said narrow
rod portion of said gripping rod having a plate-shaped portion that
engages said guide slot in said inner rod and that has a uniform
width, said guide slot in said inner rod having an elongated
rectangular cross-section with a long side and a short side that is
slightly longer than the width of said plate-shaped portion of said
narrow rod portion of said gripping rod, said plate-shaped portion
of said gripping rod and said guide slot in said inner rod
constituting said means for guiding said ball-pushing unit to move
axially within said bat body.
3. The baseball bat as claimed in claim 2, wherein said inner rod
has an end surface which is formed with a cylindrical recess that
is communicated with said guide slot in said inner rod and that has
a diameter smaller than width of said guide slot in said inner rod
to define a retaining shoulder therebetween, said gripping rod
being made of a flexible material and having a bifurcated end,
which constitutes said gripping portion and which includes two
lateral projections that extend integrally therefrom away from each
other and that are movable to abut against said retaining shoulder
so as to prevent removal of said bifurcated end of said gripping
rod from said inner rod.
4. The baseball bat as claimed in claim 2, wherein said bat body is
formed with an insert tube that is connected fixedly to said grip
portion of said bat body and that extends into said sleeve portion
of said bat body, said insert tube being inserted between said
inner rod and said outer tube of said push rod unit so as to permit
sliding movement of said insert tube therebetween, thereby further
guiding said ball-pushing unit to move axially in said bat
body.
5. The baseball bat as claimed in claim 1, wherein said wide rod
portion of said gripping rod is formed with a longitudinal slot
that extends along length thereof, said bat body including a radial
guide bolt that is fixed thereon and that extends slidably into
said longitudinal slot in said gripping rod, thereby guiding said
gripping rod to move axially in said bat body.
6. The baseball bat as claimed in claim 1, wherein said compression
spring is disposed between said ball-pushing unit and said guide
bolt, thereby biasing said ball-pushing unit away from said guide
bolt.
7. The baseball bat as claimed in claim 6, wherein said push rod
unit has an end surface which is formed with a cylindrical recess,
said compression spring having a first end portion that is received
fittingly within said cylindrical recess in said push rod unit, and
a second end portion that abuts against said guide bolt.
8. The baseball bat as claimed in claim 1, wherein said grip
portion of said bat body is formed with an axially extending
central hole therethrough, said wide rod portion of said gripping
rod extending into said central hole in said grip portion and
having an end surface that is formed with a threaded hole, said
adjustment member having an integral insert rod that is press
fitted within said central hole in said grip portion, a hole formed
through said adjustment member, and a lock bolt extending through
said hole in said adjustment member to engage said threaded hole in
said gripping rod, thereby retaining said gripping rod at said
retracted position, said adjustment member being capable of being
pulled away from said grip portion of said bat body so as to
separate said insert rod of said adjustment member from said
central hole in said grip portion and so as to move said
ball-pushing unit and said gripping rod relative to said bat body,
thereby moving said gripping rod to an extended position, in which
said retaining projection of said resilient member engages said
hole in said retaining seat of said ball-pushing unit.
9. The baseball bat as claimed in claim 1, wherein said retaining
seat has a generally U-shaped cross-section, and includes two
parallel side walls and a connecting wall that is formed integrally
with said side walls at two opposite sides thereof, said slide slot
in said retaining seat being defined between said side walls, said
hole in said retaining seat being formed through said connecting
wall.
10. The baseball bat as claimed in claim 1, wherein said sleeve
portion of said bat body is formed with an inward flange that
extends radially and inwardly therefrom and that defines said
ball-shooting opening, said bowl-shaped ball-receiving element of
said ball-pushing unit being formed with a hemispherical cavity
that is adapted to receive the baseball, said ball-shooting opening
being sized so as to be adapted to prevent movement of the ball
therethrough.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention
[0002] This invention relates to a baseball bat for training of
children, more particular to a baseball bat, which is provided with
a ball-serving device therein.
[0003] 2. Description of the Related Art
[0004] A baseball bat for training of children is made normally of
plastic. In practice, two children are needed to serve as a pitcher
and a batter, respectively. When somebody cannot find others to
play with, he must serve up a ball, and subsequently strike the
same in situ using a bat, thereby resulting in a monotonous and
difficult act.
SUMMARY OF THE INVENTION
[0005] An object of this invention is to provide a baseball bat
which is designed for training of children and which is provided
with a ball-serving device that can be operated easily to serve up
a ball so as to permit subsequent striking on the ball using the
bat.
[0006] According to this invention, a baseball bat includes a
tubular bat body with a resilient member, a ball-pushing unit which
is disposed within the bat body, a gripping rod that retains the
ball-pushing unit within the bat body, and an adjustment member
that is coupled with the gripping rod. The resilient member is
formed with a retaining projection that engages a hole in the
ball-pushing unit. The resilient member can be actuated to separate
the projection from the hole so that the ball-pushing unit is
biased by a spring to move quickly in the bat body, thereby
shooting a ball from an opening in an end of the bat body. When it
is desired to perform a subsequent ball serving action, an
adjustment member is pulled out from the bat body so as to engage
the retaining projection with the hole, after which the adjustment
member is returned to its normal position on the bat body.
BRIEF DESCRIPTION OF THE DRAWINGS
[0007] These and other features and advantages of this invention
will become apparent in the following detailed description of a
preferred embodiment of this invention, with reference to the
accompanying drawings, in which:
[0008] FIG. 1 is a partly exploded perspective view of the
preferred embodiment of a baseball bat according to this invention,
which is provided with a ball-serving device;
[0009] FIG. 2 is an assembled perspective view of the preferred
embodiment;
[0010] FIG. 3 is a longitudinal sectional view of the preferred
embodiment;
[0011] FIG. 4 is another longitudinal sectional view of the
preferred embodiment, illustrating engagement between a retaining
projection of a resilient member and a hole in a retaining
seat;
[0012] FIG. 5 is a longitudinal sectional view of the preferred
embodiment, illustrating how a ball is served from an opening in an
end of a bat body; and
[0013] FIG. 6 is a longitudinal sectional view of the preferred
embodiment, illustrating a state after an adjustment member is
pulled out from the bat body, thereby permitting subsequent ball
serving action of the ball-serving device.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0014] Referring to FIGS. 1, 2, 3 and 4, the preferred embodiment
of a baseball bat according to this invention is shown to include a
tubular bat body 10, and a ball-serving device, which includes a
ball-pushing unit 20, a gripping rod 30, and a coiled compression
spring 40.
[0015] The bat body 10 has a barrel portion 11, a grip portion 12
extending axially from an end of the barrel portion 11, and a
ball-shooting opening 13 formed in the other end of the barrel
portion 11. The barrel portion 11 defines an accommodating space
111, and has a notch 14 formed in a wall thereof. The bat body 10
further includes an integral resilient member 15, which is formed
with a retaining projection 151 that is biased to move in a radial
direction of the bat body 10. A polyurethane sleeve 121 is disposed
fixedly around the grip portion 12. An insert tube 16 is connected
fixedly to the grip portion 12, and extends into the sleeve portion
11. The grip portion 12 has an axially extending central hole 17
formed therethrough, and a radial threaded hole 120. A radial guide
bolt 18 extends threadably through the threaded hole 120 in the
grip portion 12. The ball shooting opening 13 is defined by an
inward flange 131 that extends integrally, radially and inwardly
from an end of the sleeve portion 11.
[0016] The ball-pushing unit 20 is disposed within the
accommodating space 111 in the bat body 10, and includes a
bowl-shaped ball-receiving element 21 and a push rod unit 22, which
consists of an outer tube 23 and an inner rod 24 that define an
annular space 25 (see FIGS. 3 and 4) therebetween. The
ball-receiving element 21 defines a hemispherical cavity 211 that
is adapted to receive a baseball 100 (see FIG. 4) therein, and is
formed with an integral annular flange 212. Because the
ball-receiving element 21 has a maximum diameter that is slightly
larger than the diameter of the ball-shooting opening 131 in the
bat body 10, removal of the ball-receiving element 21 from the
opening 131 is prevented. The inner rod 24 is formed with a guide
slot 26 therethrough that has an inner end (26A) and an outer end
(26B), and a cylindrical recess 241 that is formed in an end
surface of the inner rod 24 and that is communicated with the inner
end (26A) of the guide slot 26. The cylindrical recess 241 has a
diameter smaller than the width of the guide slot 26 in the inner
rod 24 to define a retaining shoulder 261 (see FIG. 1)
therebetween. The push rod unit 22 has an outer end 201 (see FIG.
4) that is connected fixedly to the ball-receiving element 21, and
an inner end 202 that is provided with a fixed retaining seat 27 on
an outer surface of the outer tube 23. Each of the inner rod 24 and
the outer tube 23 has an end that is connected fixedly to the
ball-receiving element 21. In this embodiment, the inner rod 24 is
press fitted within the annular flange 212 of the ball-receiving
element 21. The outer tube 23 is press fitted within an annular
groove in the flange 212. The retaining seat 27 has a generally
U-shaped cross-section, and includes two parallel side walls (27A)
that define a slide slot 271 therebetween, and a connecting wall
(27B) that is formed integrally with the side walls (27A) at two
opposite sides thereof and that has a hole 272 formed therethrough.
The resilient member 15 is disposed slidably within the slide slot
271. The retaining projection 151 engages the hole 272, thereby
positioning the ball-pushing unit 20 within the bat body 10.
[0017] The gripping rod 30 is retained normally at a retracted
position, and has a wide rod portion 31 disposed within the grip
portion 12 of the bat body 10, and a narrow rod portion 32 disposed
within the push rod unit 22 of the ball pushing unit 20. The wide
and narrow rod portions 31, 32 define a limiting shoulder 33
therebetween, on which the inner end 202 (see FIG. 4) of the
ball-pushing unit 20 rests. The wide rod portion 31 is formed with
a longitudinal slot 34 therethrough, which extends along length
thereof. The guide bolt 18 of the bat body 10 extends slidably into
the longitudinal slot 34, thereby guiding the gripping rod 30 to
move axially within the bat body 10 between the retracted position
and an extended position shown in FIG. 6. An adjustment member 35
has an integral insert rod 351 that is press fitted within the
central hole 17 in the grip portion 12, a hole 352 formed through
the adjustment member 35, and a lock bolt 353 extending through the
hole 352 to engage a threaded hole 311 in an end surface of the
wide rod portion 31 of the gripping rod 30, thereby retaining the
gripping rod 30 at the retracted position. The narrow rod portion
32 of the gripping rod 30 has a plate-shaped portion 320 that
engages the guide slot 26 in the inner rod 24 and that has a
uniform width. As illustrated, the guide slot 26 has an elongated
rectangular cross-section with a long side and a short side that is
slightly longer than the width of the plate-shaped portion 320 of
the narrow rod portion 32 of the gripping rod 30. As such, the
ball-pushing unit 20 is guided to move axially within the bat body
10. The gripping rod 30 is made of a flexible material, and has a
bifurcated end or gripping portion, which includes two lateral
projections 36 that extend integrally therefrom away from each
other and that are limited to move between the inner and outer ends
(26A, 26B) of the guide slot 26 in the ball-pushing unit 20,
thereby preventing removal of the lateral projections 36 from the
inner rod 24.
[0018] The spring 40 is sleeved on the wide rod portion 31 of the
gripping rod 30, and has a first end portion that is received
within the cylindrical recess 241 in the inner rod 24, and a second
end portion that abuts against the guide bolt 18. The spring 40 is
compressed between the ball-pushing unit 20 and the guide bolt
18.
[0019] In use, a ball 100 is placed in the cavity 211 of the
ball-receiving element 21 of the ball-pushing unit 20, as shown in
FIG. 4. When the resilient member 15 is pressed to disengage the
retaining projection 151 from the hole 272, the ball-pushing unit
20 is pushed by the spring 40 to move quickly within the base body
10 to the position shown in FIG. 5, where the lateral projections
36 contact the retaining shoulder 261 and where the ball 100 is
shot from the bat body 10 through the opening 131.
[0020] When it is desired to perform a subsequent ball serving
action of the ball-pushing unit 20, the adjustment member 35 is
pulled out from the central hole 17 in the grip portion 12 of the
bat body 10 in a direction shown by the arrowhead of solid lines in
FIG. 6, so that the gripping rod 30 moves relative to the bat body
10 to the extended position shown in FIG. 6, where the ball-pushing
unit 20 is pulled by the lateral projections 36 to a position, in
which the retaining projection 151 engages the hole 271. Note that
no movement is caused to the spring 40 during movement of the
gripping rod 30 within the bat body 10. Then, the adjustment member
35 is pushed back in a direction shown by the arrowhead of phantom
lines in FIG. 6 to its normal position, where it engages the
central hole 17 in the grip portion 12 of the bat body 10 and where
the gripping rod 30 is at the retracted position.
[0021] With this invention thus explained, it is apparent that
numerous modifications and variations can be made without departing
from the scope and spirit of this invention. It is therefore
intended that this invention be limited only as indicated in the
appended claims.
* * * * *