US20050272521A1 - Strengthened and vibration-damping shaft for sports equipment - Google Patents

Strengthened and vibration-damping shaft for sports equipment Download PDF

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Publication number
US20050272521A1
US20050272521A1 US10/857,862 US85786204A US2005272521A1 US 20050272521 A1 US20050272521 A1 US 20050272521A1 US 85786204 A US85786204 A US 85786204A US 2005272521 A1 US2005272521 A1 US 2005272521A1
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US
United States
Prior art keywords
shaft
vibration
central body
damping
strengthening
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US10/857,862
Inventor
Mei-Li Tsai
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to US10/857,862 priority Critical patent/US20050272521A1/en
Publication of US20050272521A1 publication Critical patent/US20050272521A1/en
Abandoned legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/12—Metallic shafts
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/54—Details or accessories of golf clubs, bats, rackets or the like with means for damping vibrations
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/08—Handles characterised by the material
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/06—Handles
    • A63B60/10—Handles with means for indicating correct holding positions
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A63B60/50—Details or accessories of golf clubs, bats, rackets or the like with through-holes

Definitions

  • the present invention relates to a shaft for sports equipment, and more particularly to a shaft that has strengthening and vibration-damping efficiency.
  • the present invention has arisen to mitigate or obviate the disadvantages of the conventional shaft for sports equipment.
  • the main objective of the present invention is to provide a strengthening shaft that has a central body accommodated inside the shaft to enhance supporting efficiency.
  • Another objective of the present invention is to provide a vibration-damping shaft that has multiple holes defined in the central body to provide a shock minimizing efficiency.
  • FIG. 1 is an intersected perspective view of a golf club with a strengthening and vibration-damping shaft in accordance with the present invention
  • FIG. 2 is a partially enlarged perspective view of the strengthening and vibration-damping shaft in FIG. 1 , wherein a flat central body extends inside the shaft;
  • FIG. 3 is a partially cross-sectional side plane view of the strengthening and vibration-damping shaft, wherein multiple damping holes are formed throughout the shaft all;
  • FIG. 4 is a partially cross-sectional side plane view of the strengthening and vibration-damping shaft, wherein multiple damping holes are formed in only a portion of the shaft;
  • FIG. 5 is a partially cross-sectional perspective view of another embodiment of the strengthening and vibration-damping shaft for sports equipment in accordance with the present invention, wherein a cruciform central body is accommodated inside the shaft;
  • FIG. 6 is a partially cross-sectional perspective view of still another embodiment of the strengthening and vibration-damping shaft for sports equipment in accordance with the present invention, wherein the shaft is oval in cross-section.
  • a strengthening and vibration-damping shaft for sports equipment in accordance with the present invention comprises a tube, a central body accommodated inside the tube, and multiple damping holes defined either entirely or partly along the length of the central body.
  • the central body provides a supporting efficiency to the shaft to prevent the shaft curving or deforming when the shaft is being swung.
  • the damping holes mitigate vibration transmission and so eliminate most vibrating energy. Therefore, the shaft has less vibration whereby the comfort and strength enable the user to keep the shaft steady for accurate hitting of balls etc.
  • a first preferred embodiment of the strengthening and vibration-damping shaft ( 30 ) used in a golf club comprises a tube ( 10 ) round in cross-section, a flat central body ( 15 ) extending inside the round tube ( 10 ), and multiple cutouts ( 152 ) defined in the flat central body ( 15 ).
  • the round tube ( 10 ) has an inner channel ( 102 ) with an inner periphery.
  • the flat central body ( 15 ) is longitudinally accommodated inside the inner channel ( 102 ) and has two sides respectively abutting to the inner periphery of the round tube ( 10 ).
  • the multiple cutouts ( 152 ) are longitudinally defined in the flat central body ( 15 ) at intervals and respectively at sides of the flat central body ( 15 ).
  • Each of the multiple cutouts ( 152 ) is a segment with an arcuate edge and a flat edge, wherein the flat edge is adjacent to the inner periphery of the round tube ( 10 ).
  • the cutout ( 152 ) forms a damping hole ( 20 ) inside the shaft ( 30 ) to mitigate and decrease vibration transmission along the shaft.
  • damping holes ( 20 ) can be varied.
  • the damping holes ( 20 ) are longitudinally defined in sides of the flat central body ( 15 ) at intervals along the entire length of the flat central body ( 15 ) to eliminate the vibration gradually.
  • the damping holes ( 20 ) are selectively defined in partial sections at sides of the flat central body ( 15 ) at intervals but not over the entire length of the flat central body ( 15 ).
  • a second preferred embodiment of the strengthening and vibration-damping shaft has the same structure with the first embodiment except that the central body ( 16 ) is cruciform in cross section.
  • the cruciform central body ( 16 ) correspondingly has four sides respectively connected to the inner periphery of the round tube ( 10 ).
  • Multiple damping holes ( 20 ) are defined in each side of the cruciform central body ( 16 ).
  • a third embodiment of the strengthening and vibration-damping shaft for sports equipment has an oval cross-section tube ( 101 ).

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Golf Clubs (AREA)

Abstract

A strengthening and vibration-damping shaft for sports equipment has a tube, a central body accommodated inside the tube, and multiple damping holes defined in the central body partly or completely along the length of of the central body. The central body provides a supporting efficiency to the shaft to prevent the shaft curving or deforming when the shaft is being swung. The damping holes mitigate and decrease vibration transmission to eliminate most vibrating energy. Therefore, the shaft has less vibration to keep the shaft steady for accurate hitting without deformation.

Description

    BACKGROUND OF THE INVENTION
  • 1. Field of the Invention
  • The present invention relates to a shaft for sports equipment, and more particularly to a shaft that has strengthening and vibration-damping efficiency.
  • 2. Description of Related Art
  • Many items of sports equipment have a shaft, especially badminton rackets and golf clubs, wherein the shaft is long and thin. Conventional II shafts in such equipment have a simple tubular structure without any strengthening element. Therefore, the shaft is easily deformed and curved by a reacting force when being violently swung to hit a ball. The deformation of the shaft causes an inaccurate trajectory of the ball so that a user can not precisely determine the destination of the ball. Additionally, vibration that occurs during impact of the ball and shaft causes injury to the user's hands.
  • The present invention has arisen to mitigate or obviate the disadvantages of the conventional shaft for sports equipment.
    • SUMMARY OF THE INVENTION
  • The main objective of the present invention is to provide a strengthening shaft that has a central body accommodated inside the shaft to enhance supporting efficiency.
  • Another objective of the present invention is to provide a vibration-damping shaft that has multiple holes defined in the central body to provide a shock minimizing efficiency.
  • Further benefits and advantages of the present invention will become apparent after a careful reading of the detailed description with appropriate reference to the accompanying drawings.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is an intersected perspective view of a golf club with a strengthening and vibration-damping shaft in accordance with the present invention;
  • FIG. 2 is a partially enlarged perspective view of the strengthening and vibration-damping shaft in FIG. 1, wherein a flat central body extends inside the shaft;
  • FIG. 3 is a partially cross-sectional side plane view of the strengthening and vibration-damping shaft, wherein multiple damping holes are formed throughout the shaft all;
  • FIG. 4 is a partially cross-sectional side plane view of the strengthening and vibration-damping shaft, wherein multiple damping holes are formed in only a portion of the shaft;
  • FIG. 5 is a partially cross-sectional perspective view of another embodiment of the strengthening and vibration-damping shaft for sports equipment in accordance with the present invention, wherein a cruciform central body is accommodated inside the shaft; and
  • FIG. 6 is a partially cross-sectional perspective view of still another embodiment of the strengthening and vibration-damping shaft for sports equipment in accordance with the present invention, wherein the shaft is oval in cross-section.
    • DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
  • A strengthening and vibration-damping shaft for sports equipment in accordance with the present invention comprises a tube, a central body accommodated inside the tube, and multiple damping holes defined either entirely or partly along the length of the central body. The central body provides a supporting efficiency to the shaft to prevent the shaft curving or deforming when the shaft is being swung. The damping holes mitigate vibration transmission and so eliminate most vibrating energy. Therefore, the shaft has less vibration whereby the comfort and strength enable the user to keep the shaft steady for accurate hitting of balls etc.
  • With reference to FIGS. 1 and 2, a first preferred embodiment of the strengthening and vibration-damping shaft (30) used in a golf club comprises a tube (10) round in cross-section, a flat central body (15) extending inside the round tube (10), and multiple cutouts (152) defined in the flat central body (15).
  • The round tube (10) has an inner channel (102) with an inner periphery. The flat central body (15) is longitudinally accommodated inside the inner channel (102) and has two sides respectively abutting to the inner periphery of the round tube (10). The multiple cutouts (152) are longitudinally defined in the flat central body (15) at intervals and respectively at sides of the flat central body (15). Each of the multiple cutouts (152) is a segment with an arcuate edge and a flat edge, wherein the flat edge is adjacent to the inner periphery of the round tube (10). Thereby, the cutout (152) forms a damping hole (20) inside the shaft (30) to mitigate and decrease vibration transmission along the shaft.
  • With further reference to FIGS. 3 and 4, arrangements of the damping holes (20) can be varied. In FIG. 3, the damping holes (20) are longitudinally defined in sides of the flat central body (15) at intervals along the entire length of the flat central body (15) to eliminate the vibration gradually. In FIG. 4, the damping holes (20) are selectively defined in partial sections at sides of the flat central body (15) at intervals but not over the entire length of the flat central body (15). With reference to FIG. 5, a second preferred embodiment of the strengthening and vibration-damping shaft has the same structure with the first embodiment except that the central body ( 16) is cruciform in cross section. The cruciform central body (16) correspondingly has four sides respectively connected to the inner periphery of the round tube (10). Multiple damping holes (20) are defined in each side of the cruciform central body (16).
  • With reference to FIG. 6, a third embodiment of the strengthening and vibration-damping shaft for sports equipment has an oval cross-section tube (101).
  • Although the invention has been explained in relation to its preferred embodiment, it is to be understood that many other possible modifications and variations can be made without departing from the spirit and scope of the invention as hereinafter claimed.

Claims (9)

1. A strengthening and vibration-damping shaft for sports equipment comprising:
a tube having an inner channel with an inner periphery;
a central body longitudinally accommodated inside the inner channel and having at least two sides respectively abutting to the inner periphery of the tube; and
multiple damping holes longitudinally defined in the central body at intervals.
2. The strengthening and vibration-damping shaft as claimed in claim 1, wherein the multiple damping holes are respectively defined at sides of the central body.
3. The strengthening and vibration-damping shaft as claimed in claim 2, wherein each of the multiple damping holes is a segment with an arcuate edge and a flat edge; and
the flat edge of the damping hole is adjacent to the inner periphery of the tube.
4. The strengthening and vibration-damping shaft as claimed in claim 3, wherein the multiple damping holes are defined along an entire length of the central body.
5. The strengthening and vibration-damping shaft as claimed in claim 3, wherein the multiple damping holes are defined along part of a length of the central body.
6. The strengthening and vibration-damping shaft as claimed in claim 1, wherein the central body is cruciform in cross-section.
7. The strengthening and vibration-damping shaft as claimed in claim 1, wherein the central body is straight in cross-section.
8. The strengthening and vibration-damping shaft as claimed in claim 1, wherein the tube is round in cross-section.
9. The strengthening and vibration-damping shaft as claimed in claim 1, wherein the tube is oval in cross-section.
US10/857,862 2004-06-02 2004-06-02 Strengthened and vibration-damping shaft for sports equipment Abandoned US20050272521A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US10/857,862 US20050272521A1 (en) 2004-06-02 2004-06-02 Strengthened and vibration-damping shaft for sports equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10/857,862 US20050272521A1 (en) 2004-06-02 2004-06-02 Strengthened and vibration-damping shaft for sports equipment

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US20050272521A1 true US20050272521A1 (en) 2005-12-08

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070049431A1 (en) * 2005-08-23 2007-03-01 Meyer Rene P Sticks for athletic equipment
US20090023514A1 (en) * 2007-07-18 2009-01-22 Directflex, Llc Direct flex
US10213666B1 (en) 2018-01-31 2019-02-26 Breakthrough Golf Technology Llc Golf shaft
US10857433B2 (en) 2018-01-31 2020-12-08 Breakthrough Golf Technology, Llc Golf shaft system and golf shaft

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265401A (en) * 1964-01-29 1966-08-09 Spier I Martin Reinforcement for a pole
US4374315A (en) * 1980-02-04 1983-02-15 Timbrook Robert L Golf club shaft and method of making the same
US20030144071A1 (en) * 2002-01-28 2003-07-31 Dodge David J. Sports equipment having a tubular structural member

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3265401A (en) * 1964-01-29 1966-08-09 Spier I Martin Reinforcement for a pole
US4374315A (en) * 1980-02-04 1983-02-15 Timbrook Robert L Golf club shaft and method of making the same
US20030144071A1 (en) * 2002-01-28 2003-07-31 Dodge David J. Sports equipment having a tubular structural member

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070049431A1 (en) * 2005-08-23 2007-03-01 Meyer Rene P Sticks for athletic equipment
US7614969B2 (en) 2005-08-23 2009-11-10 Hammer Sports Inc. Sticks for athletic equipment
US8323129B1 (en) 2005-08-23 2012-12-04 Meyer Rene P Process for making composite athletic shaft
US20090023514A1 (en) * 2007-07-18 2009-01-22 Directflex, Llc Direct flex
US7594861B2 (en) * 2007-07-18 2009-09-29 Directflex, Llc Direct flex
US10213666B1 (en) 2018-01-31 2019-02-26 Breakthrough Golf Technology Llc Golf shaft
US10729952B2 (en) 2018-01-31 2020-08-04 Breakthrough Golf Technology, Llc Golf shaft
US10857433B2 (en) 2018-01-31 2020-12-08 Breakthrough Golf Technology, Llc Golf shaft system and golf shaft
US11045700B2 (en) 2018-01-31 2021-06-29 Breakthrough Golf Technology, Llc Golf shaft
US11358041B2 (en) 2018-01-31 2022-06-14 Breakthrough Golf Technology Llc Golf shaft system and golf shaft
US11752407B2 (en) 2018-01-31 2023-09-12 Breakthrough Golf Technology Llc Golf shaft system and golf shaft

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