Amusement devices: games – Surface projectile game; game element – Simulated game
Patent
1986-01-17
1988-05-10
Marlo, George J.
Amusement devices: games
Surface projectile game; game element
Simulated game
273189R, 340573, A63B 6936
Patent
active
047430281
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a golf swing practice device.
The correct positioning of the "power arm" with respect to the body of a golfer during a golf swing is an important aspect of the golf swing. The term "power arm" as used herein means the arm which generates club head speed. In particular the power arm is the right arm of the golfer playing with right handed clubs and the left arm of a golfer playing with left handed clubs. A problem common to many golfers is that the upper portion of the power arm moves too far away from the body during the back swinging of the golf stroke. This can result in a loss of power and control of the golf club head. As such, golfers must make a conscious effort to try and learn to keep the upper portion of the power arm tucked in against the body during swinging.
Applicant has already devised a practice device to assist in learning control of the power arm and this device is the subject of Australian co-pending application 20922/83. While this device is satisfactory it does create some difficulties owing to its relatively large size.
U. S. Pat. No. 4,193,065 discloses a device for indicating to a golfer that the golfer's target control arm is being bent during a golf swing. Essentially the device comprises a movable member which is hingedly connected to a main housing both of which are strapped about the golfer's target control arm so that hinged or pivotal movement of the member causes a circuit to open and close thereby illuminating a light if the golfer's control arm bends. While this device may be satisfactory for the specific problem of target arm control it clearly would not be suitable for the problem confronted by applicant in the present invention for reasons which will be apparent from a reading of the following description.
It is a object of the present invention to provide a golf swing practice device which can be used by a golfer to develop a better golf swing.
According to the present invention there is provided a golf swing practice device for providing an indication as to the position of a golfer's power arm with respect to their body during the execution of their golf swing, the practice device comprising:
a main body which is configured so that, in an operative position, it can be disposed between the golfer's power arm and their body and including means for securing the main body in said operative position;
sensing means operatively carried by said main body and being capable of adopting either an activated position or a de-activated position;
biasing means for causing said sensing means to be normally urged into one of said activated or de-activated positions and, in use, said sensing means is adapted to be urged into the other of said positions as a result of pressure applied by the golfer's power arm towards their body against the bias of said biasing means; and
indicating means responsive to the position of said sensing means to provide an indication as to which of said positions said sensing means is in, said sensing means and said indicating means being arranged in an electrical circuit.
In use the main body is configured for positioning between the inside of the user's upper portion of the power arm and the user's body and when the arm is in the correct position against the user's body the sensing means adopts either its activated or deactivated position. During the back swing of the golf stroke the sensing means will move into the outer position as a result of the upper portion of the user's power arm moving substantially away from the user's body.
Preferably the main body comprises two parts which are operatively connected together for limited movement towards and away from one another, this limited movement causing the sensing means to adopt its activated and deactivated positions.
The biasing means may be adapted to normally urge the two parts of the main body away from one another. In one form the biasing means may comprise a piece of resilient or elastic material disposed between the two parts of the main body. In another form the bias
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