Weight adjustable tennis racquet
US5054780A · kind A · utility
Inventor
Key dates
| Filing date | Aug 30, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Aug 30, 2010 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63B60/54
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A weight adjustable tennis racquet comprises a head frame and a handle, wherein, at least one elastic counter-weight holder with a plurality of counter weights can be attached to the head frame. At least one receiving recess is formed on the head frame along with a retaining bar extending across the width of each recess to conform with the profile of the head frame. Each counter-weight holder has a cavity formed on its inner surface and a retaining groove formed on its outer surface. A plurality of circular recesses is formed on the base of each retaining groove receive a variable number of counter weights for weight adjustment. The elastic counter-weight holders with the selective addition of counter weights, can be inserted into the receiving recesses with their cavities gripping the inner circumference of the head frame and the retaining bars in place over the retaining grooves, holding the counter-weight holders and counter weights in place.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.