Games using tangible projectile – Playing field or court game; game element or accessory... – Practice or training device
Reexamination Certificate
2000-01-11
2001-06-12
Chapman, Jeanette (Department: 3711)
Games using tangible projectile
Playing field or court game; game element or accessory...
Practice or training device
C273S371000, C073S493000, C403S300000, C356S028000, C473S156000
Reexamination Certificate
active
06244979
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a pitching practice device which includes a net portion and each string composing the net has its own detecting means to detect the displacement and the velocity of the ball.
BACKGROUND OF THE INVENTION
A conventional pitching device known to applicant is disclosed in Taiwanese utility patent application No. 88206273 and includes a frame with four sides. One of any two opposite sides of the frame has a plurality of emitting devices and the other side has receiving devices. The emitting devices each emit infrared rays to the corresponding receiving device on the opposite side so as to define a plurality of longitudinal rays and latitude rays, which define a net portion. The pitcher is required to pitch a ball through the frame and when the ball passes through the net portion, some of the infrared rays are interrupted so that the information is transferred to a CPU to display scores on a display board. However, the infrared rays emitting devices or the receiving devices are expensive so that the price of the pitching practice device will not be affordable for general players. Furthermore, the display board cannot show the velocity of the ball.
The present invention intends to provide a pitching practice device which includes simple parts and deformable strings so that when balls hit the strings, the displacement provides efficient data for the CPU to calculate the speed of the balls.
SUMMARY OF THE INVENTION
In accordance with one aspect of the present invention, there is provided a pitching practice device and comprising a frame having four sides, and a plurality of longitudinal strings and latitude strings connected between the four sides of the frame. Each side of the frame has two side members, a front member and a rear member. Each string is connected between a handle and a connection member. A plurality of first tubes extend through the side member on one side and a plurality of second tube extend through the side member on the other side. Each of the first tube and the second tube have a passage defined longitudinally therethrough. A receiving member is connected to an inside of each first tube and each connection member has an emitting member connected to a first end thereof and the emitting member is located in the passage of the first tube. A second end of each connection member is connected to a spring which is fixedly connected to the side member next to the first tube.
The object of the present invention is to provide a pitching practice device that has a net portion composed of strings each of which is deformable so that the speed of the ball can be calculated by the displacement of the strings.
These and further objects, features and advantages of the present invention will become more obvious from the following description when taken in connection with the accompanying drawings which show, for purposes of illustration only, several embodiments in accordance with the present invention.
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patent: 4850084 (1989-07-01), Iwasaki
patent: 5626526 (1997-05-01), Pao et al.
patent: 5779241 (1998-07-01), D'Costa et al.
patent: 5820496 (1998-10-01), Bergeron
patent: 5988645 (1999-11-01), Downing
Aryanpour Mitra
Chapman Jeanette
Rosenberg , Klein & Lee
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