Bent composite golf club shaft and methods for manufacturing bent composite golf club shafts
US12257764B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 13, 2021 |
| Grant date | Mar 25, 2025 |
| Priority date | — |
| Expiry date | May 12, 2043 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2031/5227
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Lightweight, low-torque, composite golf club shafts with bent tips and methods of manufacturing such golf club shafts are disclosed herein. Some methods involve the use of pre-bent, rigid tubes that remain inside the finished composite shafts to support their bent tip structures. Other methods require the use of cores (which may be flexible and/or dissolvable), which support the composite shaft precursors when they are placed into forming molds to form the bent tips. These cores may be removed at the end of the bending process. Still other methods incorporate the use of bladders to provide support for shaft tips when they are subjected to molding forces.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.