EP0561040A1 - Rahmen eines Tennisschlägers aus Metallegierung - Google Patents

Rahmen eines Tennisschlägers aus Metallegierung Download PDF

Info

Publication number
EP0561040A1
EP0561040A1 EP92117798A EP92117798A EP0561040A1 EP 0561040 A1 EP0561040 A1 EP 0561040A1 EP 92117798 A EP92117798 A EP 92117798A EP 92117798 A EP92117798 A EP 92117798A EP 0561040 A1 EP0561040 A1 EP 0561040A1
Authority
EP
European Patent Office
Prior art keywords
alloy
head
racket frame
shaft
adhesive layers
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.)
Withdrawn
Application number
EP92117798A
Other languages
English (en)
French (fr)
Inventor
Ching-Dong Pai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
PAI CHING DONG
Original Assignee
PAI CHING DONG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by PAI CHING DONG filed Critical PAI CHING DONG
Publication of EP0561040A1 publication Critical patent/EP0561040A1/de
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/03—Frames characterised by throat sections, i.e. sections or elements between the head and the shaft
    • A63B49/032—T-shaped connection elements

Definitions

  • the present invention relates to bonding of an alloy racket frame, especially an aluminum alloy racket frame.
  • the bonding of the two ends 511 of the head 51 will gradually deteriorate along the boundary of the adhesive when the racket hits balls because of the impact coming therefrom directly transfers to the three-way joint 5, producing considerable stress, thereby resulting in cracks on the boundary. Therefore, the prior bonding cannot satisfy the essential properties of sport rackets. Also, the obvious adhesive portion of the exposed three-way joint 5 does not have aesthetic value.
  • Another object of this invention is to provide an alloy racket frame which possesses aesthetic value.
  • an alloy racket frame particularly an aluminum alloy racket frame
  • the racket frame consists of a head 1, a shaft 3 and a handle (not shown).
  • the head 1 has two ends 11 slightly contacting each other.
  • a first end of the shaft 3 slightly contacts the ends 11 and a second end of the shaft 3 is coaxially joined with the handle.
  • a member 2 for connecting the head 1 and the shaft 3 comprises a slim foam portion 20, a plurality of first adhesive layers 21 and a plurality of second adhesive layers 22.
  • the slim foam portion 20 which is made from, for example, EVA (copolymer of ethylene and vinyl acetate) is surrounded by the first adhesive layers 21.
  • the slim foam portion 20 has a first end inserted into a first end 11 and a second end inserted into the second end 11, for connecting the first and second ends 11.
  • the first end of the shaft 3 is sited below the ends 11.
  • the ends 11 which have been connected to each other and the first end of the shaft 3 are then surrounded by a number of second adhesive layers 22, thereby obtaining a bonding portion 30.
  • the adhesive layers 21 and 22 are prepregs, i.e., fibers such as carbon fibers, glass fibers, and boron fibers which are impregnated with thermosetting resins incorporating curing agents and, preferably, fillers therein.
  • fibers having impregnated thermosetting resins are wound about the ends 11 and the first end of the shaft 3 by means of filament winding with one or more fibers so as to form the bonding portion 30.
  • the bonding portion 30 is then hot pressed.
  • the slim foam portion 20 expands so that its two ends are secured in the ends 11.
  • the first adhesive layers 21 help securely attach the slim foam portion 20 to the head 1, which cure thereafter.
  • the second adhesive layers 22 tightly secure the head 1 and shaft 3 after being heated and compressed and cured.
  • the frame is to be painted and the head 1 is to be drilled for insertion of a string.
  • squash rackets employ larger diameters for the head 1, the shaft 3 and the handle as they have to endure much higher impact than badminton rackets, so that a stronger bonding portion 30 is necessitated.
  • Another layout of the bonding portion 30 is shown.
  • Two members 2 each have a slim foam portion 20 surrounded by first adhesive layers 21.
  • a first end of each member 2 is inserted in a corresponding end 11 and a second end of each member 2 is inserted in the shaft 3.
  • the ends 11 and the first end of the shaft 3 are surrounded by a number of second adhesive layers 22 so as to form the bonding portion 30.
  • the bonding portion 30 is then hot pressed and the slim foam portions 20 expand so as to force the first adhesive layers 21 to be respectively secured within the ends 11 and the first end of the shaft 3. Meanwhile, the second adhesive layers 22 tightly secure the head 1 and the shaft 3 together after being hot pressed and cured, thereby resulting in a squash racket possessing increased strength.
  • a wedge-shaped foam material can be sited between the two ends 11 and enclosed within the second adhesive layers 22.

Landscapes

  • Health & Medical Sciences (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Laminated Bodies (AREA)
EP92117798A 1992-03-18 1992-10-19 Rahmen eines Tennisschlägers aus Metallegierung Withdrawn EP0561040A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MY9200439 1992-03-18
MYPI9200439 1992-03-18

Publications (1)

Publication Number Publication Date
EP0561040A1 true EP0561040A1 (de) 1993-09-22

Family

ID=19749659

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92117798A Withdrawn EP0561040A1 (de) 1992-03-18 1992-10-19 Rahmen eines Tennisschlägers aus Metallegierung

Country Status (1)

Country Link
EP (1) EP0561040A1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3633597A1 (de) * 1985-10-02 1987-04-30 Hitachi Ltd Pcm-signal-aufzeichnungs- und wiedergabevorrichtung
JP2009034333A (ja) * 2007-08-01 2009-02-19 Yonex Co Ltd バドミントンラケット及びバドミントンラケットの製造方法
JP2010131319A (ja) * 2008-12-08 2010-06-17 Yonex Co Ltd バドミントンラケット及びバドミントンラケットの製造方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083968A (en) * 1958-12-17 1963-04-02 Takahashi Yoshiaki Game racket construction
GB1223834A (en) * 1967-03-15 1971-03-03 Maurice Robinson Improvements relating to rackets
US4360202A (en) * 1978-09-08 1982-11-23 Lo Kun Nan CFRP or FRP made badminton racket frame
GB2151492A (en) * 1983-12-16 1985-07-24 Yonex Kk Badminton racket

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3083968A (en) * 1958-12-17 1963-04-02 Takahashi Yoshiaki Game racket construction
GB1223834A (en) * 1967-03-15 1971-03-03 Maurice Robinson Improvements relating to rackets
US4360202A (en) * 1978-09-08 1982-11-23 Lo Kun Nan CFRP or FRP made badminton racket frame
GB2151492A (en) * 1983-12-16 1985-07-24 Yonex Kk Badminton racket

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3633597A1 (de) * 1985-10-02 1987-04-30 Hitachi Ltd Pcm-signal-aufzeichnungs- und wiedergabevorrichtung
JP2009034333A (ja) * 2007-08-01 2009-02-19 Yonex Co Ltd バドミントンラケット及びバドミントンラケットの製造方法
EP2177247A4 (de) * 2007-08-01 2012-11-07 Yonex Kk Federballschläger und verfahren zur herstellung eines federballschlägers
JP2010131319A (ja) * 2008-12-08 2010-06-17 Yonex Co Ltd バドミントンラケット及びバドミントンラケットの製造方法

Similar Documents

Publication Publication Date Title
US6413343B1 (en) Method for manufacturing hybrid golf club shafts
JP3985201B2 (ja) 強化木製バットと製法
US6251034B1 (en) Ball bat
EP1084737A2 (de) Golfschlägerschaft
US5071124A (en) Badminton racquet
EP1755748B1 (de) Verbundschläger mit doppelrohrigem rahmenkopf
EP1790393B1 (de) Sport Schläger mit Rahmen bestehend aus mehreren Sektionen
US5217223A (en) Tennis racket with metal/composite frame
EP0561040A1 (de) Rahmen eines Tennisschlägers aus Metallegierung
US4855173A (en) Repair process for a fibre reinforced structure
US20050064965A1 (en) Shock absorbing baseball bat and method of manufacturing
US20220040547A1 (en) Ball bat with one-piece multi-wall barrel portion
US4579343A (en) Graphite composite racquet
US4282642A (en) Method of making composite racquet construction
JP2762006B2 (ja) バドミントン用ラケットフレームの成形方法
JPH06178829A (ja) 継ぎ目に接着剤のないテニス・ボール
US5417418A (en) Monoshaft composite tennis racquet
EP0235777A2 (de) Tennisschlägerrahmen und Herstellungsverfahren
EP0574626A1 (de) Aus Kunststoff-Verbundmaterial bestehender Schlägerrahmen
US5344139A (en) Racket shaft mounting device
JPH05177020A (ja) ゴルフクラブシャフト及びその製造方法
US11325327B2 (en) Ball bat with one-piece multi-wall barrel portion
US5155896A (en) Method of manufacturing the throat portion of an aluminum racket
CA2028373C (en) Golf club construction
JP3761652B2 (ja) ゴルフクラブ

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19930625

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT DE DK FR GB IE NL SE

RBV Designated contracting states (corrected)

Designated state(s): AT DE DK FR GB NL SE

17Q First examination report despatched

Effective date: 19940525

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19941005