U.S. patent number 3,758,117 [Application Number 05/260,399] was granted by the patent office on 1973-09-11 for golf swing training device.
Invention is credited to John G. Harrison.
United States Patent |
3,758,117 |
Harrison |
September 11, 1973 |
GOLF SWING TRAINING DEVICE
Abstract
The inertia attachment includes an arm on which is a weight
adjustable longitudinally of the arm and a clamp adapted to attach
the arm to the shaft of a golf club which requires follow-through
when swung; the weight has tail fins and is shaped to be
directional in the direction into which the shaft is swung and is
registerable with the head of the golf club or the like; the arm is
pivoted on the clamp so as to be adjustable from an out of the way
position parallel with the shaft toward and above the club head. In
one embodiment, the weight may include a rotatable propeller
mounted in a recess between the tail fins. In another embodiment,
the weight is shiftable along a shaft and compresses a spring as
the weight moves rearwardly. The weight includes a passage through
which the arm extends, and the weight may be secured in various
positions along the length of the arm by the provision of a spring
clip located in the passage. The spring clip is adapted to
selectively engage grooves provided along the length of the
arm.
Inventors: |
Harrison; John G. (Benicia,
CA) |
Family
ID: |
22989009 |
Appl.
No.: |
05/260,399 |
Filed: |
June 7, 1972 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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143916 |
May 17, 1971 |
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Current U.S.
Class: |
473/231;
473/238 |
Current CPC
Class: |
A63B
69/3632 (20130101) |
Current International
Class: |
A63B
69/36 (20060101); A63b 069/36 () |
Field of
Search: |
;273/194,163,186,183,193,26,35 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Marlo; George J.
Parent Case Text
This application is a continuation-in-part of the copending
application Ser. No. 143,916, filed May 17, 1971 on Inertia
Follow-Through Attachment, now abandoned.
Claims
I claim:
1. In combination, a game club and an inertia device for
follow-through practice of said game club, said device
comprising,
an inertia body, and
means to attach said inertia body to said club so as to hold said
inertia body to be moved on the same arc as said club is swung
thereby to exert momentum for continued movement of said club,
said inertia body being approximately spherical,
a frusto-conical leading extension on said body,
tail fins extended from said body axially oppositely to said
leading extension,
and means to adjustably connect said inertia body to said attaching
means in a position wherein said leading extension is in the
direction of movement of said club.
2. The combination specified in claim 1, and
said club having a striking head, and
a shaft extended from the striking head for swinging said head.
3. The combination specified in claim 1, and
said club having a shank and a head, and a striking face on said
head for striking a ball,
said leading extension being at right angles to the plane of the
striking face of the club.
4. The combination specified in claim 3, and
said adjustable connecting means including an arm, and
means to adjustably support said inertia body on said arm.
5. The combination specified in claim 4, and
said attaching means including,
a clamp adapted to be secured to the shaft of the golf club,
said arm being adjustable on said clamp into positions parallel
with the shaft and into operative positions parallel with said club
head.
6. The combination specified in claim 4, and
said arm being flat, and being in a plane approximately at right
angles to the plane of said striking face of said club.
7. The combination specified in claim 6, and
said means to adjustably support said inertia body on said arm
including,
a plurality of grooves on said flat arm,
said body having a passage therethrough slideable on said flat
arm,
and a spring clip in said passage resiliently and selectively
engageable with said grooves.
8. The combination specified in claim 4, and
said tail fins providing an inward recess, and
a freely rotatable propeller mounted in said recess so as to be
rotated by the airflow during the back stroke of said article.
Description
BACKGROUND OF THE INVENTION
One of the primary faults of golf players is the lack of
follow-through after the golf ball is hit. In order to facilitate
the player to acquire the habit of consistent follow-through, the
herein invention provides a weight adjustable to such position that
the inertia of the weight coincides with the movement of the club
head and exerts a force to continue the swinging of the club after
the ball is hit, thereby to train the player. This inertia
follow-through attachment may be applied to the shafts or rods of
other items used in sports where follow-through is essential for
good performance.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a view of the inertia follow-through attachment on the
shaft of a golf club.
FIG. 2 is a sectional view taken substantially on lines 2--2 of
FIG. 1.
FIG. 3 is a top plan view of the weight.
FIG. 4 is a perspective view of a modified form of the clamp.
FIG. 5 is a plan view of a modified form of the invention.
FIG. 6 is a front view of said modified form.
FIG. 7 is a perspective view of the inertia member with a free
rotating propeller on the back to rotate during the back
stroke.
FIG. 8 is a side view of another modified form showing a spring and
weight combination with the inertia member.
DETAILED DESCRIPTION
The weight of the inertia device includes an inertia element in the
form of a substantially spherical body 1 which has a conical
projection 2 on one side thereof, and which has a diametrical slot
3 slideable on an arm 4. Tail fins 5 extend from the body 1 in a
direction opposite from the conical point 2 for directional
movement of the inertia body 1. A detent spring 6 in one side of
the slot 3 bears against the adjacent face of the arm 4. The arm is
preferably flat and the face of the arm adjacent the detent spring
6 has suitable ribs 7 thereon for engagement by the detent spring 6
thereby to hold the inertia body 1 in adjusted position.
The arm 4 is pivoted on a suitable pivot 8 in a forked lug 9 of a
bracket 10. The bracket has an open recess 11 on one face with a
knurled or serrated portion 12 opposite which is provided a set
screw 13 for tightly clamping the bracket 10 on the shaft 14 of the
golf club. The arm 4 is tightly engaged in the slot 15 in the
forked lug 9 to be held in an adjusted attitude. For instance, the
arm may be pivoted upwardly into a position parallel with the shaft
14 or may be adjusted from there downwardly to a position
substantially parallel with the club head 16 as shown in FIG. 1 in
full lines. The inertia body 1 is so positioned on the arm 4 that
its pointed end 2 points in the same direction as the face of the
club head 16 so that the inertia body 1 swings substantially
parallel with the club head 16 thereby to exert a force to pull the
club head and thereby the hand of the player through the swing
after hitting the ball.
It is critical that the conical point 2 of the inertia body 1 point
in a direction generally at right angles to the plane of the face
of the club head 16. The axis of the pivot 8 is also to be at right
angles to said plane and parallel with the axis of the inertia body
1 through the point of conical point 2. The slot 3 is at right
angles to the horizontal axis of the inertia body 1 through the
point of the conical projection 2.
The form of the clamp shown in FIG. 4 includes preferably a plate
16 which has a dent 17 to form a seat for the shaft 14 so that a
clamping flange 18 extends on one end and an arm support flange 19
extends on the other end. A clamp 21 fits over the opposite side of
the shaft 14 and has a pair of prongs 22 inserted in holes 23 in
the arm supporting flange 19. Another flange 23 overlies the
securing flange 18 and is tightly held together by a suitable screw
24 and wing nut 26. A suitable removable liner 27 is provided
within the clamp 21 to accommodate the clamp to shafts of different
sizes.
The arm 7 is pivotally supported on a pivot screw 28 and is tightly
held in position by a wing nut 29. On the end of the arm 7 beyond
the pivot 28 is a pressed detent 31 which can engage selectively a
series of sockets or holes 32 arranged on an arc centered on the
pivot 28, whereby the arm 7 is positively in adjusted position.
In the form shown in FIG. 5 the arm 41 is twisted relatively to the
clamp 42 on the shaft 43 so that its edge 44 faces in the direction
of the swing thereby to reduce air resistance. On the flat portion
of the arm 41 are a plurality of grooves 46. The inertia member has
a substantially spherical head 47 with slightly elongated nose. A
transverse hole 48 in the inertia member 47 slideably fits over the
arm 41. A spring clip 49 in the hole 48 resiliently fits into the
hole above the top face of the arm 41 so that its central rib 51 is
resiliently urged into the selected grooves 46 to adjust the
leverage of the inertia member. Elongated fins 52 extend rearward
from the inertia member 47.
The clamp 42 is a continuous resilient extension of the arm 41
which latter is made of spring steel or other suitable material of
sufficient resiliency to aid in the swing. A suitable bolt 53
extends through the free end of the clamp 42 and the root or base
of the arm 41 to tighten the clamp as shown in FIG. 5.
In the form shown in FIG. 7 a freely rotating propeller 54 is held
on a central hub shaft 56 recessed inwardly of the tips of the fins
52 so as to allow the propeller to be freely rotated on the back
stroke.
In the form shown in FIG. 8 instead of fins the inertia member 61
has a frusto-conical tail 62 from which extends a shaft 63 which
has a head 64 at its outer end spaced from the end of the tail 62.
An inertia ball 66 has a hole 67 therethrough slideable on the
shaft 63. A coil spring 68 between the tail 62 and the ball 66
resiliently holds the ball against the head 64, so that when the
club is swung forward the ball 66 compresses the spring 68 and
assists in the direction of the follow-through.
* * * * *