Abstract: A golf club includes a head, a retaining ring, a tightening ring, an adjusting sleeve, a hosel, a fixing sleeve, a coupler, and a shaft. A pin is threadedly engaged with a transverse screw hole of the neck and a transverse screw hole of the hosel and extended into a transverse hole of the coupler, such that the shaft is pivotable about the pin to allow adjustment in the tilt angle between the shaft and the head. The golf club provides a tilt adjustable mechanism with a strong structure while providing reliable tilt adjustment.

Abstract: A golf club includes a head, a retaining ring, a tightening ring, an adjusting sleeve, a hosel, a fixing sleeve, a coupler, and a shaft. A pin is threadedly engaged with a transverse screw hole of the neck and a transverse screw hole of the hosel and extended into a transverse hole of the coupler, such that the shaft is pivotable about the pin to allow adjustment in the tilt angle between the shaft and the head. The golf club provides a tilt adjustable mechanism with a strong structure while providing reliable tilt adjustment.

Abstract: This invention relates to a golf club head with an adjustable tilt mechanism which is designed to be mounted between a shaft and a head. Simply speaking, the neck of the head forms a long adjusting cavity and the shaft is held in the long adjusting cavity of the head by the pivot but pin permitting left or right swing. The shaft is further locked in the lock ring and clamped in place by the tie land and tie slot carved on the head to retain the shaft fast within the long adjusting hole of the head. This mechanism permits an adequate adjustment of tilt angle (an angle of elevation) of the face. At the case of a long flight of ball striking, the face at a desirable tilt angle will render the ball a low or high parabola along the flight course to fly over the obstacle.

Abstract: A cylinder block has a chamber communicating with a cylinder sleeve. The cylinder sleeve has spiral recesses on the outer periphery of the cylinder sleeve. Spaced through holes are on the spiral recesses. Oil-seepage holes are on the periphery of the oil pipe. The oil pipe coils around the cylinder sleeve along the spiral recesses. An oil-collecting groove is beneath the cylinder sleeve to communicate with an outlet pipe. An inlet pipe communicates with the upper end of the cylinder sleeve. The upper end of the oil pipe communicates with the inlet pipe.