Racket for striking a ball
OwnerEckard Schlenkerinventor
Life of this patent
Estimating the term…
Abstract
A racket for striking a ball, in particular a tennis racket includes a closed inner stringed frame which is at least partly enclosed by an outer support frame, with both frames being hingedly connected by at least two joints such that a local rotation of both frames relative to each other is permitted at the points of articulation. The joints are arranged relative to each other in such a manner that the inner frame is prevented from carrying out a rigid-body motion relative to the outer support frame and that both frames are prevented from carrying out a translational movement perpendicular to each other perpendicular to the racket plane.
Claims22
A racket for striking a ball;
- comprising:
- a racket head defining a racket plane and including a stringed inner frame and an outer support frame which at least partly encloses said inner frame and is connected to a handle;
- and
- joint means for hingedly connecting said inner frame with said outer frame, said joint means defining at least two axes of rotation which are oriented parallel to said racket plane without coinciding with each other, said joint means allowing a local rotation of said inner and outer frames relative to each other at each point of articulation and preventing a relative translational motion of said inner and outer frames perpendicular to said racket plane.
A racket for striking a ball;
- comprising:
- a racket head defining a longitudinal axis and including a stringed inner frame and an outer support frame which at least partly encloses said inner frame;
- and
- joint means for hingedly connecting said inner frame with said outer frame and allowing a rotation of both frames relative to each other at each point of articulation, said joint means including three joints, with one joint defining an axis of rotation coinciding with said longitudinal axis, and with each of said other two joints defining an axis of rotation, with said two axes of rotation of said other two joints intersecting upon said longitudinal axis.
A racket for striking a ball;
- comprising:
- a racket head defining a longitudinal axis and including a stringed inner frame and an outer support frame which at least partly encloses said inner frame;
- and
- joint means for hingedly connecting said inner frame with said outer frame and allowing a rotation of both frames relative to each other at each point of articulation, said joint means including at least two joints arranged in such a manner that two axes of rotation are oriented perpendicular to and intersecting each other, with one axis of rotation coinciding with said longitudinal axis.
A racket for striking a ball;
- comprising:
- a racket head defining a longitudinal axis and including a stringed inner frame and an outer support frame which at least partly encloses said inner frame;
- and
- joint means for hingedly connecting said inner frame with said outer frame and allowing a rotation of both frames relative to each other at each point of articulation, said joint means including at least two joints defining two axes of rotation which are oriented parallel at a distance to each other and extend perpendicular to said longitudinal axis.
A racket for striking a ball;
- comprising:
- a racket head including a stringed inner frame and an outer support frame which at least partly encloses said inner frame;
- and
- joint means for hingedly connecting said inner frame with said outer frame and allowing a rotation of both frames relative to each other at each point of articulation, said joint means including four joints defining two axes of rotation intersecting each other and extending perpendicular to each other.
Dependencies are inferred from the claim text.