Striking implement comprising a constrained frequency resonator
AssigneeArizona Board of Regents on behalf of Arizona State University
InventorCody Friesen
Life of this patent
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Abstract
A constrained frequency resonator is incorporated into the shaft of a striking implement for transferring and, advantageously, amplifying momentum from a striking end to a gripped end of the striking implement, thereby amplifying the sensation of a strike felt at the gripped end. The resonator has a substantially hourglass shape, with wide ends and a narrow waist, and is made of stainless steel or another very hard material. The shape of the resonator causes it to act as a vibration frequency filter that transfers and, preferably, amplifies a certain frequency or band of frequencies. The striking implement may be a golf club, pool cue, or other implement in which frequency transfer to a gripping section is desired.
Claims20
A striking implement having a shaft extending between a head and a gripping section, wherein the shaft includes a resonator having material properties and dimensioning tuned to resonate at a desired resonant frequency upon impact to the head, and wherein the resonator amplifies and transmits vibratory motion caused by the impact from the head to the gripping section at the resonant frequency, wherein amplifying, by the resonator, the vibratory motion increases an amplitude of the vibratory motion occurring at the resonant frequency.
A shaft for a striking implement, the shaft having a distal shaft section coupled to a gripping section by a resonator that amplifies and transmits vibratory motion to the gripping section at a resonant frequency of the resonator, wherein an amplitude of the vibratory motion occurring at the resonant frequency is increased by the resonator, wherein the resonator has a distal end configured to couple to the distal shaft section and a proximal end configured to couple to one of the gripping section and a proximal shaft section, and wherein the resonator has a recessed section coupling the distal end to the proximal end and being tuned to effect a pre-selected amplitude and frequency band of the vibratory motion transmitted to the gripping section, the pre-selected frequency band including the resonant frequency.
A resonator for a striking implement, the resonator comprising:
- a distal end configured to couple to a distal shaft section of the striking implement and to receive an impulse force imparted on the distal shaft section and effecting a vibratory motion in the distal end, the vibratory motion having a first amplitude and frequency, the distal end having a first width;
- a proximal end configured to couple to one of a gripping section and a proximal shaft section of the striking implement, the proximal end having a second width;
- a recessed section coupling the distal end to the proximal end and tuned to amplify and transmit a constrained vibratory motion from the distal end to the proximal end, the constrained vibratory motion having a second amplitude that is increased by the resonator and a second frequency in which the second frequency includes a resonant frequency of the resonator;
- and
- a waist having a third width, wherein the third width of the waist is inversely proportional to the second amplitude of the amplified and transmitted constrained vibratory motion.
Dependencies are inferred from the claim text.