Iron type golf club head

Inactive Publication Date: 2003-09-25
BRIDGESTONE SPORTS
View PDF15 Cites 42 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A long iron is a club difficult for beginners to make a good shot because it has a smaller loft angle and a longer shaft than that of a short iron.
As a result, it is difficult for beginners or powerless golfers to hit a ball high or the hit ball is apt to travel to the right (in the case of right-handed golfers, the same thing will be applied hereinafter) or slice heavily.
When the distance from the center of gravity is larger than this range, it becomes difficult particularly for beginners to turn the head so that a hit ball is apt to travel to the right or slice.
On the contrary, when the distance from the center of gravity is smaller than this range, it becomes easy to turn the head excessively so that a missed shot called a smothered ball or an excessive hook ball is apt to appear.
In this case, however, the vertical width of the sweet area is reduced, or there arises the feeling of insecurity to the eyes of be

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Iron type golf club head
  • Iron type golf club head
  • Iron type golf club head

Examples

Experimental program
Comparison scheme
Effect test

Example

.degree. 31.8 17.5 6.8 28.4 10.2 Comp. 23.degree. 35.7 21.5 2.2 18.9 3.6 Example

[0046] A carbon shaft was attached to each of the golf club heads so as to manufacture a golf club (long iron) having a club length of 38.5 inches (978 mm). Thus, evaluation was made by trial shots. As a result, a high handicapped golfer could not hit any shot but a ground ball to the right using the golf club with the iron type golf club head in Comparative Example. On the other hand, the high handicapped golfer could hit a ball substantially straightly about 170 yards repeatedly using the golf club with the iron type golf club head according to the invention.

[0047] As described above, according to the invention, a golf club head is provided in which the center of gravity is low, and with which it is easy even for beginners to hit a ball high, while there is a little fear that a hit ball travels to the right or slices.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

An iron type golf club head including a face portion having a planar face surface, and a hosel portion connected to the heel side of the face portion. A shaft insertion hole is provided in the hosel portion so as to penetrate the hosel portion. The distance from the center of gravity is 28-33 mm, the height of the center of gravity is 12-21 mm, the depth of the center of gravity is 5-15 mm, and the goose distance is 4-15 mm.

Description

[0001] The present disclosure relates to the subject matter contained in Japanese Patent Application No. 2002-1540 filed on Jan. 8, 2002, which is incorporated herein by reference in its entirety.[0002] 1. Field of the Invention[0003] The present invention relates to an iron type golf club head, and particularly relates to an iron type golf club head applicable to a long iron having a small loft angle.[0004] 2. Description of the Related Art[0005] As known well, an iron type golf club head has a face portion having a planar face surface, and a hosel portion connected to the heel side of the face portion and provided with a shaft insertion hole. A shaft is inserted into the shaft insertion hole and fixedly attached thereto by a bonding agent. A distance (distance in front view) between the center of gravity of the golf club head and the extension of the shaft axis is called a distance from the center of gravity.[0006] A long iron is a club difficult for beginners to make a good shot ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): A63B53/04A63B102/32
CPCA63B53/047A63B2053/0408A63B2053/0433A63B2053/0416A63B2053/0491A63B53/0408A63B53/0416A63B53/0433A63B60/02
Inventor SHIMAZAKI, HIDEO
Owner BRIDGESTONE SPORTS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products