Golf swing training device

• US 4,614,343 A
• Filed: 02/11/1985
• Issued: 09/30/1986
• Est. Priority Date: 02/11/1985
• Status: Expired due to Term

• Current Assignee: Guhn Y. Kim
• Original Assignee: Snapper, Inc. (Briggs & Stratton Corporation)
• Inventors: Radway, Ronald F.
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US06/700,473
• Time in Patent Office: 596 Days
• Field of Search: 273/186 A, 273/26 B, 273/29 A, 273/193 R, 273/193 A, 273/194 B
• US Class Current: 473/234
• CPC Class Codes: A63B 69/3635 with sound-emitting source

Abstract

A golf swing training device comprising an elongate golf club shaft provided with a golf club hand grip at the upper end thereof and a weighted mechanical head assembly fixedly connected to the lower end thereof. The shaft is connected to the mechanical head assembly by an improved connector assembly. The mechanical head assembly comprises a spring biased weighted cartridge member positioned within a barrel housing and provided with snap ring-engaging fingers extending outwardly through slots provided in the barrel housing. The barrel housing is provided with an adjustable head closure member at the lower end thereof which is adapted to selectively increase or decrease tension of the cartridge-engaging main spring contained in the barrel housing. A cartridge-engaging main spring is positioned within the barrel housing by use of upper and lower locator bearings. A snap ring is provided for selective slidable movement along the external surface of the barrel housing and is retained at the upper portion thereof by the cartridge snap ring-engaging fingers which extend through the slots of the barrel housing when the golf swing training device is not in use. Upon execution of a properly executed golf swing, the resultant centrifugal force causes the spring loaded weighted cartridge to move downwardly within the barrel so as to cause the snap ring-engaging fingers to retract within the barrel, thereby releasing the snap ring which proceeds downwardly along the outer surface of the barrel at a high rate of speed until it collides with the edge of the adjustable head housing so as to produce a loud snap and a resultant physical feeling as if a golf club had properly struck a golf ball.

Claims

1. In a golf swing training device for use by golf instructors and golfers comprising:

a flexible hollow golf club shaft, said shaft provided with a golf club hand grip at the upper end thereof;

a mechanical head assembly fixedly connected to the lower end of said shaft by use of shaft connector assembly means, said mechanical head assembly comprising;

a barrel housing having a pair of opposed snap ring-engaging finger receiving slots provided therethrough;

a weighted spring biased cartridge member slidably mounted within said barrel housing, said weighted cartridge member provided with a pair of opposed pivotally mounted outwardly curved spring-biased snap ring-engaging fingers, said snap ring-engaging fingers extending through said finger receiving slots when said cartridge member is in its upper rest position within said barrel housing;

an upper spherical cartridge-engaging locator bearing provided within said barrel housing being in operative engagement with the lower end of said weighted cartridge member;

a main compression spring provided within said barrel housing in operative engagement with said upper locator bearing to maintain said weighted cartridge member in its upper rest position within said barrel housing, said main compression spring being in operative engagement with said upper cartridge-engaging locator bearing at the upper end thereof;

a lower spherical locator bearing provided within said barrel housing being in operative engagement with the lower end of said main compression spring;

an adjustable head closure member provided in threaded closure engagement with the lower end of said barrel housing and having an upper edge adjacent the external surface of the barrel housing, said adjustable head closure member being in positive engagement with said lower spherical locator bearing so as to selectively vary the tension of said main compression spring by selective threaded adjustment of said adjustable head closure member in relation to the barrel housing;

said shaft connector assembly means comprising;

a collar member having a shaft-receiving bore therethrough which is adapted for press-fit engagement with said hollow shaft positioned therethrough;

a longitudinally oriented expander pin in press-fitted engagement within the lower end of said hollow shaft so as to expand said hollow shaft into fixed positive engagement with the interior of said collar member, said collar member defining a lower downwardly extending narrow neck portion adapted for press-fit engagement within the upper interior end of said barrel housing; and

a transverse spring pin positioned within a diametral transverse bore through said barrel housing, said neck portion of said collar member, said hollow shaft and said expander pin so as to maintain said barrel housing, said collar member, said hollow shaft and said expander pin in permanent fixed mating engagement; and

a snap ring member slidably provided on the external surface of said barrel housing, said snap ring member retained in its upper rest position on said barrel housing by the ends of said snap ring-engaging fingers extending through said finger receiving slots, said snap ring selectively releasable to rapidly slide downwardly along said barrel housing into snap sound-engaging contact with the upper edge of said adjustable head closure member when the centrifugal force created by the properly executed swing of the golf club training device causes said weighted cartridge member to move downwardly within the barrel housing so as to retract said snap fingers within said barrel housing upon conatct with the lower edges of said longitudinal slots, thereby releasing said snap ring to also move downwardly in response to the centrifugal force created by the properly executed swing so as to strikably engage the upper edge of said adjustable head closure member to impart a simulated feel and sound of a properly struck golf ball to the golfer.

2. In the golf swing training device of claim 1 wherein said weighted cartridge member is provided with a transversely positioned snap ring-engaging finger expander spring therethrough, said expander spring adapted to act upon the ends of said opposed snap ring-engaging fingers so as to selectively maintain them in their expanded position through said longitudinal slots provided through said barrel housing, said expander spring being selectively compressible so as to permit said snap ring-engaging fingers to retract within said barrel housing when said weighted cartridge member moves downwardly within said barrel housing in response to centrifugal force created by the properly executed swing of said golf swing training device.

3. In the golf swing training device of claim 1 wherein said adjustable head closure member is provided with an internal conical lower spring locator bearing-engaging surface, said conical surface adapted to stabilizingly engage said lower spring locator bearing so as to maintain said main compression spring in a stable position within said barrel housing.

4. In the golf swing training device of claim 1 wherein a safety loop wrist strap is provided at the top of said golf club hand grip so as to selectively encircle the wrist of a golfer during the use of said golf swing training device.

5. In the golf swing training device of claim 1 wherein spring tension indicator indicia are provided along the lower exterior surface of the barrel housing, said indicia adapted to cooperate with the upper edge of the adjustable head closure member to give a visual indication of the selective threaded adjustment of the adjustable head closure member so as to selectively vary the tension of said main compression spring.