Takraw ball

• US 4,813,674 A
• Filed: 07/08/1987
• Issued: 03/21/1989
• Est. Priority Date: 11/05/1986
• Status: Expired

• Current Assignee: Boonchai Lorhpipat
• Original Assignee: Boonchai Lorhpipat
• Inventors: Lorhpipat, Boonchai
• Primary Examiner(s): Marlo, George J.
• Application Number:
  US07/071,186
• Time in Patent Office: 622 Days
• Field of Search: 273/58 B, 273/58 BA, 273/327, 273/428, 273/58 K, 273/60 B, 273/58 R, 273/58 D, 428/11, 446/107, 446/120
• US Class Current: 473/612
• CPC Class Codes: A63B 2039/003 substantially hollow and pressureless
• CPC Class Codes: A63B 39/00 Hollow non-inflatable balls , i.e. having no valves rigid balls A63B37/00

Abstract

Disclosed herein is a takraw ball comprising hoops woven into a spherical basket, each hoop being formed of an elongate, generally flat strip of plastics material, each strip having one convex side edge of constant radius and the other side edge of sinusoidal undulating profile and being joined by its ends to form a frusto-conical hoop; pairs of hoops being arranged with the strip convex side edges opposed in a common plane or in parallel planes and the sinusoidal side edges relatively staggered so that interwoven hoops intersect at the troughs of sinusoidal side edges.

Claims

1. A takraw ball comprising bands (1) woven into a spherical basket, each band (1) comprising a pair of hoops (2), each hoop (2) being formed of an elongate strip (4) of plastics material, each strip having one convex side edge (5) of constant radius and the other side edge of sinusoidal undulating profile (6, 7) and being joined by its ends to form a frusto-conical hoop (2);

pairs of hoops (2) being arranged into bands with the strip convex side edges (5) of the pair of hoops of each band being contiguous or adjacent each other in parallel planes and the sinusoidal side edges (6,

     7) relatively staggered so that interwoven bands (1) intersect at the troughs (7) of sinusoidal side edges (6,

     7).

2. A takraw ball as claimed in claim 1, wherein each pair of hoops are separated by an additional hoop (3) formed of an elongate, narrow, flat and straightside edged strip (18) of plastics material, the additional hoop being inserted centrally between the opposed side edges of each hoop pair thereby to force each hoop pair apart to tighten the weave of the ball.

3. A takraw ball as claimed in claim 2, wherein the outer face (8) of each side hoop (2) is chamfered to one side (9) of each sinusoidal trough (7), to accommodate an overlying interwoven side hoop (2) at a cross-over (26).

4. A takraw ball as claimed in claim 3, wherein each sinusoidal side edge is asymetrically notched (11) to one side of each sinusoidal trough (7) to accommodate an overlying, central hoop (3) at a cross-over (26).

5. A takraw ball as claimed in claim 4, wherein the outer face (8) of each strip is provided with a longitudinal grooving (12, 21) to control the elasticity of the strip and the weight of the ball.

6. A takraw ball as claimed in claim 5, wherein each side strip (2) has at one end a tooth (13) shaped to engage a hole (14), located proximate the other end of the strip in a depression (15) in the outer face (8), the depression being shaped to accommodate the toothed end of the strip and form a flush-surface joint.

7. A takraw ball as claimed in claim 1 and comprising six bands (I-VI) woven into a spherical basket with twenty cross-overs, wherein the sinusoidal undulating profile of each side strip (2) comprises five equispaced peaks (6) and intervening troughs (7).