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US 4,620,705 AGranted
Racket stringing device
AssigneeAsics Corporation
InventorAkira Tsuchida
Life of this patent
Estimating the term…
Abstract
A gut stringing device for stringing a tennis racket or the like which permits accurate adjustment of a tension applied to the string. The device has a threaded screw and a nut mounted on it. Slide plates carrying a string clamp are moved by driving the threaded screw. Simultaneously a lever coupled to the nut swings against the bias of a spring until it touches a limit switch set at a desired pound value. The limit switch stops a motor driving the threaded screw.
Claims6
A racket stringing device, comprising:
- a base;
- a slide plate slidably mounted on said base for movement in a direction;
- a reversible motor;
- a threaded screw fixedly coupled to said reversible motor for being reversably rotated thereby;
- a string clamping means, fixedly mounted on said slide plate, for clampingly receiving a string to be strung on a racket;
- a lever having one end pivotally mounted on said slide plate, said slide plate being formed with first and second slots extending in said direction, said lever being formed with third and fourth slots;
- means, fixed to said lever, for threadably engaging said threaded screw;
- a first pin extending through said first slot and said third slot and a second pin extending through said second slot and said fourth slot so as to loosely couple said lever to said slide plate at said first and second slots;
- and
- spring means, having one end secured to said slide plate and another end secured to the other end of said lever, for elastically connecting said other end of said lever to said slide plate.
7 more elements
A racket stringing device, comprising:
- a base;
- racket clamping means, attached to said base, for securing a racket in place;
- a slide plate slidably mounted on said base for movement in a direction;
- a reversible motor;
- a threaded screw fixedly coupled to said reversible motor for being reversably rotated thereby;
- a string clamping means, fixedly mounted on said slide plate, for clampingly receiving a string to be strung on a racket;
- a lever having one end pivotally mounted on said slide plate, said slide plate being formed with first and second slots extending in said direction, said lever being formed with third and fourth slots;
- means, fixed to said lever, for threadably engaging said threaded screw;
- a first pin extending through said first slot and said third slot and a second pin extending through said second slot and said fourth slot so as to loosely couple said lever to said slide plate at said first and second slots;
- and
- spring means, having one end secured to said slide plate and another end secured to the other end of said lever, for elastically connecting said other end of said lever to said slide plate.
8 more elements
Dependencies are inferred from the claim text.