In collaboration with our partner Division, LLC., we have designed a new type of tennis racquet, the “equalizer”, that represents the first fundamental innovation in tennis since the large-head racket was introduced in 1976.
- a. All current rackets look and play essentially the same.
- b. All current racket faces have nearly identical oval shapes. These provide strong and light frames, but convey very limited power and control, and have a relatively small sweet spot (about the size of a man’s fist).
- c. All current rackets require a choice between power (low string tension) and control (high tension). They cannot provide both; and whatever choice is made, the result is far from optimal.
- d. Conventional stringing is slow, cumbersome, and highly inaccurate -- string tensions on all current rackets are very different from those requested, initially, and even more so after play.
- f. The Equalizer® will change all this.
1. Approximately rectangular racket face
- a. All main strings have approximately the same length and can be independently tensioned to vibrate with the same frequency.
- b. All cross strings also have the same (shorter) length, and with suitable string material can be tensioned to vibrate with the same frequency as the mains.
- c. Equalized vibration frequency of all strings produces greater power and a sweet spot (SS) at least four times larger (about the size of a man’s face).
- d. With this new source of power, and immense SS you can have both power and control.
- e. The Equalizer®’s large axial moment of inertia reduces the error from off-axis hits.
- e. Equalized string vibrations reduce the error from hits on adjacent strings.
- f. The Equalizer®, which provides the first new face look in 150 years, is made possible by the use of innovative new materials, grommets, and stringing protocols.
- g. Our dramatic new metallic look incorporates improved aerodynamics.
2. Integrated lockable grommets
- a. Enable independent stringing and exact tensioning of each string.
- b. Enable equal frequencies without equal string lengths.
- c. Enable rounded corners and a shorter outer side for increased strength and playability.
- d. Enable lower tensions on (shorter) cross and outer strings, to create an even larger SS.
- e. Enable rapid stringing with pre-cut strings using a smart-phone “app”.
- f. Enable easy re-tensioning or replacement of individual strings -- courtside.
- h. Enable playability even with broken strings.
3. Stringing protocols and devices
- a. New stringing protocol maintains face shape at each step so there are no tension changes.
- b. Protocol eliminates release shock on frame.
- c. Protocol enables strong quasi-rectangular face with light weight.
- d. New stringing device enables fast, automated in-shop stringing, allowing all strings to be tensioned simultaneously.
- e. Hand-held tensioning device with smartphone “app” enables stringing anywhere – even courtside.
4. Vibration control
- a. Aerodynamic lightening holes, insulated grommets, and wedge-shape profile all reduce vibrations.
- b. Patented “Sting Stopper” in handle absorbs and dissipates remaining vibrations, dramatically reducing incidence of “tennis elbow”.