US 6,659,922 B1Granted

Resistance adjustment mechanism for easy pull exerciser

AssigneeJao-Hsing Tsai

InventorHui-Nan Yu

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Abstract

A resistance adjustment mechanism for an easy pull exerciser mainly comprises an outer shell, adjustment device, winding wheel and gear axis. The outer shell is composed of the first and second shells. The first shell has an adjustment device containing a rotating knob, a retainer and a one-way clutch bearing. The retainer is clamped and attached to the first shell with outside for the rotating knob's thread stud to pass through. Normally, the teeth on gear axis match the inner ring gear of the second shell. A flexible arrangement for gear axis makes the gear axis rotate under inward pressure, so the degree of tightness for the spiral spring can be adjusted to control the resilient force for the pull string. Therefore, when back to the normal state, the gear axis is positioned to the inner ring gear. The mechanism provides easy adjustment and secured position for the gear axis.

A resistance adjustment mechanism for an easy pull exerciser, mainly comprising an outer shell having a pair of semi-spherical shells, a handle on one side of said outer shell, a winding wheel inside said semi-spherical shells, a wrapping pull string on peripheral of said winding wheel, one end of said wrapping pull string fixed to said winding wheel and the other end to a pull handle located on other side of said outer shell, a side cavity formed on one side of said winding wheel for placing a spiral spring, said winding wheel placed on an outer shell by passing a gear axis through, said spiral spring fixed to said winding wheel at outer end and fixed to said gear axis at an inner end, when said pull spring is subject to pulling force, said spiral spring is deformed and twisted, when no force is applied to said pull string, said spiral spring is back to normal state and said winding wheel is wrapped around by said pull spring, characterized by that:

said outer shell contains a first shell and a second shell, an adjustment device is placed at one end of said pull string near said winding wheel, said adjustment device contains a rotating knob, a retainer and a one-way clutch bearing, said retainer is clamped and fixed to said first shell, outside of said retainer is available for said rotating knob to secure by passing a thread stud through, said thread stud can connect to said one-way clutch bearing, a curved plate is located on a front of said one-way clutch bearing inside said outer shell for said pull string to move along a curved surface;
and
inside an axis holder for said second shell, there is a ring gear for holding said gear axis, at an outer end of said gear axis, there is a multilateral hole, on said gear axis, there are teeth in a circle, at a rear part, there is an extended hollow axis tube incorporating an elastic device, under normal conditions, said teeth of said gear axis are retained to an inner ring gear due to action of said elastic device.

Facts

Application

10/419,132Filed 21 Apr 2003

Granted

9 Dec 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification8 codes

A63B 21/153
Using flexible elements for reciprocating movements, e.g. ropes or chains: wound-up and unwound during exercise, e.g. from a reel
A63B 21/0004
Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without…:…
A63B 21/025
Wound springs: spiral springs with turns lying substantially in plane surfaces
A63B 21/4043
Characterised by the movements of the interface: free movement, i.e. the only restriction coming from the resistance

Abstract

Claims2