US 8,075,429 B2 · Racquet stringing machine

Abstract

A stringing machine includes a base and an adjustable stringing platform coupled to the base. The stringing platform includes a turntable rotatable about a first axis, and a first releasable resistance assembly coupled to the turntable. The first releasable resistance assembly is selectable between an engaged operating mode in which the releasable resistance assembly resists rotation of the turntable about the first axis, and a disengaged operating mode in which the releasable resistance assembly does not resist rotation of the turntable about the first axis. The releasable resistance assembly includes a magnetorheological fluid for resisting rotation of the turntable about the first axis when in the engaged operating mode.

Claims22

Dependent claims

A stringing machine, comprising:

a base;
an adjustable stringing platform coupled to the base, the stringing platform including a turntable rotatable about a first axis, and a first releasable resistance assembly coupled to the turntable, the first releasable resistance assembly being selectable between an engaged operating mode in which the releasable resistance assembly resists rotation of the turntable about the first axis, and a disengaged operating mode in which the releasable resistance assembly does not resist rotation of the turntable about the first axis, the releasable resistance assembly including a magnetorheological fluid for resisting rotation of the turntable about the first axis when in the engaged operating mode.

A racquet stringing machine configured to support a racquet, the stringing machine comprising:

a base;
a stringing platform coupled to the base, the stringing platform including
a turntable rotatable about a first axis,
a first releasable resistance assembly coupled to the turntable, the first releasable resistance assembly being selectable between an engaged operating mode in which the releasable resistance assembly applies a resistance force of 3 lbs or less against the rotation of the turntable about the first axis, and a disengaged operating mode in which the releasable resistance assembly does not resist rotation of the turntable about the first axis, and
a second releasable resistance assembly coupled to the stringing platform and the turntable, and wherein the second releasable resistance assembly when activated locks the turntable preventing the turntable from rotating about the first axis.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/758,486Filed 12 Apr 2010 · continuation in part

Priority

11 Apr 2007

Published

US 2010/0227716 A19 Sep 2010

Granted

13 Dec 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

A63B 51/14
Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings: arrangements for stringing, e.g. for controlling the…
A63B 21/0056
Using electromagnetic or electric force-resisters: using electromagnetically-controlled friction, e.g. magnetic particle brakes
A63B 2209/08
Characteristics of used materials: magnetic
A63B 2225/09
Miscellaneous features of sport apparatus, devices or equipment: adjustable dimensions

Family

Application60/922,799Us provisional application · filed 11 Apr 2007

Application12/077,012Parent of this continuation-in-part · filed 14 Mar 2008

US 2010/0227716 A1Pre-grant publication · published 9 Sep 2010

US 7,695,383 B2Parent of this continuation-in-part

US 2008/0254924 A1Published application

US 8,075,429 B2This patent

From the US filing history. Foreign family members aren’t listed.

Racquet stringing machine

Life of this patent

Racquet stringing machine

Life of this patent

Abstract

Claims22