摘要:
A golf club having a club head with a striking plate having a thickness in the range of 0.010 to 0.250 inches is disclosed herein. The club head may be composed of three pieces, a face, a sole and a crown. Each of the pieces may be composed of a titanium material. The striking plate of the club head may have an aspect ratio less than 1.7. The striking plate may also have concentric regions of thickness with the thickness portion in the center. The club head may be composed of a titanium material, have a volume in the range of 175 cubic centimeters to 400 cubic centimeters, a weight in the range of 165 grams to 300 grams, and a string plate surface area in the range of 4.00 square inches to 7.50 square inches. The golf club head may also have a coefficient of restitution greater than 0.8 under test conditions such as the USGA test conditions specified pursuant to Rule 4-1e, Appendix II, of the Rules of Golf for 1998-1999.
摘要:
A tapered wall shaft with a reinforced tip includes a rear portion, a front portion and an interconnecting portion. The interconnecting portion has a smoothly decreasing outer diameter and a smoothly increasing wall thickness. The tapered wall shaft with a reinforced tip is formed by a rotary swaging operation, a sink drawing operation and a rotary swaging operation.
摘要:
A tubular blank for producing golf club shafts comprises a butt section having a uniform cross-sectional configuration along its length, a tip section also having a uniform cross-sectional configuration along its length, and a tapered section interconnecting the butt and tip sections. Metallurgically formed rifling on the interior surface of the blank extends throughout the entirety of the butt, tip and tapered sections. The golf club shafts produced from these blanks have increased strength and stiffness which is a direct result of the interior rifling. A set of golf club shafts preferably is produced from a group of these tubular blanks with each blank of the group having the same length and the same natural frequency. Predetermined portions are then selectively removed from the tip and butt sections. The ultimately produced golf club shafts are frequency matched along a predetermined gradient and each shaft of the set has a predetermined stiffness distribution along its length directly related to the stiffness distribution of the other shafts of the set.
摘要:
The invention provides methods of manufacturing hardened stainless steel tubing, pipe, shafts and assemblies. The tubing can include having a brazed lock seam (18) or a channel seam to provide additional strength. The present invention further provides stainless steel shafts, tubing, pipe, or assemblies reinforced with stainless steel members (22) brazed and hardened within the shafts, tubing, pipe or assemblies.
摘要:
In einem Verfahren zur Herstellung eines mit einer Endfläche (121) versehenen Verbindungabschnitts (100) als Teil eines Werkzeuges (101), insbesondere eines axialbeweglich in der Werkzeugaufnahme eines Bohrhammers befestigten Bohrers, oder als Teil einer Verbindungsstange (800) weist der Verbindungsabschnitt (100) mindestens zwei Längsnuten (125) oder Längsflächen (125) auf, von denen mindestens eine zur Endfläche (121) des Verbindungsabschnitts hin zumindest teilweise geschlossen ist. Dabei wird ein Bohrerhalbzeug (107) oder einer Stange (800) mit einer im Wesentlichen zylinderförmigen Umfangsoberfläche (108) bereitgestellt, mindestens zwei Längsnuten (125) oder Längsflächen (125) in die Umfangsoberfläche (108) geformt und die mindestens eine geformten Längsnut oder Längsfläche weitergeformt (230).
摘要:
The present invention relates to a closing device (10) for sports footwear, which comprises a rack (20) and a lever (40) suitable for engaging with the rack (20) in at least one position. The lever (40) consists of a lever arm (50) and a forked lug (60) which are connected together by means of a tie-piece (70). The rack (20), the lever arm (50) and the forked lug (60) are made of an aluminium alloy and have a surface hardness factor of at least 90 HB. A suitable material is a 7000 series aluminium alloy. The invention also relates to a method for manufacturing the closing device (10). The method involves extruding a 7000 series aluminium alloy billet, stamping the components of the fastener in a blanking press and boring the obtained component.