Wood-type club

• US 6,482,106 B2
• Filed: 02/07/2001
• Issued: 11/19/2002
• Est. Priority Date: 02/07/2000
• Status: Expired due to Fees

• Current Assignee: Mitsuhiro Saso, Tadashi Nakata
• Original Assignee: Mitsuhiro Saso, Tadashi Nakata
• Inventors: Saso, Mitsuhiro
• Primary Examiner(s): Passaniti, Sebastiano
• Application Number:
  US09/777,926
• Publication Number:
  US 20010027139A1
• Time in Patent Office: 650 Days
• Field of Search: 473/324, 473/327, 473/328, 473/345, 473/346, 473/350, 473/228, D21/733, D21/734, D21/759
• US Class Current: 473/327
• CPC Class Codes: A63B 2225/01 Special aerodynamic features, e.g. airfoil shapes, wings or air passages
• CPC Class Codes: A63B 53/04 Heads
• CPC Class Codes: A63B 53/0433 with special sole configurations
• CPC Class Codes: A63B 53/0437 with special crown configurations
• CPC Class Codes: A63B 53/0466 wood-type
• CPC Class Codes: A63B 60/00 Details or accessories of golf clubs, bats, rackets or the like
• CPC Class Codes: A63B 60/006 Surfaces specially adapted for reducing air resistance
• CPC Class Codes: A63B 60/52 with slits

Abstract

The present invention provides a wood-type club constituted such that the toe-down effect and the covering effects of the head can be more reliably suppressed. Attitude-correcting portions (30, 31) extending from the impact face (11) side to the back (14) side of the head are provided in at the least the toe (T) side and the heel (H) side of the head relative to a center line passing longitudinally through the head center of gravity in either the side parts (15, 16) or the sole (13) of the head (10), and are formed such that a portion of the highspeed airflow impacting the head at downswing is captured by at the least two attitude-correcting portions, either maintaining the head in a proper attitude, or correcting the head to a proper attitude.

Claims

1. A wood-type club, in which there are at the least two disposed concave groove attitude-correction portions extending from an impact face side to a back side of the head in at the least a toe side and a heel side of the head relative to a center line passing longitudinally through the head center of gravity in the side parts of the head, wherein an extension of each of said at the least two attitude-correcting portions cross each other behind the back side of the head, and said at the least two attitude-correcting portions are formed so as to capture a portion of the highspeed airflow impacting the head at downswing and form a highspeed air body which acts as a cylindrical guide member, either maintaining the head in a proper attitude, or correcting the head to a proper attitude.

2. The wood-type club according to claim 1, wherein said attitude-correcting portion is formed by cutting into the head.

3. The wood-type club according to claim 1, wherein said concave groove forms a sectional shape for which the opening width thereof is either the same as the maximum groove width or smaller than the maximum width.

4. The wood-type club according to claim 1, wherein said concave groove is provided either in a horizontal direction or downwardly from a horizontal direction relative to a head in a square attitude.

5. A golf club head comprising:

at the least two concave groove attitude-correction portions disposed in the head, said at the least two concave groove attitude-correction portions extending from an impact face side to a back side of the head in at the least a toe side and a heel side of the head relative to a center line passing longitudinally through the head center of gravity in the side parts of the head, said at the least two attitude-correcting portions being substantially linear and formed so as to capture a portion of the highspeed airflow impacting the head at downswing and form a highspeed air body which acts as a cylindrical guide member to either maintain the head in a proper attitude or correct the head to a proper attitude,

wherein a substantially linear extension of each said at the least two attitude-correcting portion cross each other behind the back side of the head.