Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
2000-04-04
2001-10-09
Boehler, Anne Marie (Department: 3618)
Land vehicles
Wheeled
Occupant propelled type
C280S251000, C280S255000, C280S282000
Reexamination Certificate
active
06299189
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an exerciser bike, and more particularly to an exerciser bike having two treadle-typed driving mechanisms for driving two rear wheels respectively.
2. Description of the Prior Art
Everybody knows that exercise is beneficial to our health. Traditional exercising devices such as treadmill and stationary exercising bike are indoor and quite tedious. Therefore, outdoor bicycle and tricycle exercises are more and more popular.
Regarding bicycle, not everyone can ride a bicycle. Basically, a tricycle is easier, safer and more stable than a bicycle. For those persons who are not suitable to ride a bicycle or who cannot ride a bicycle (such as kids, elders, weak patients, etc.), riding a tricycle seems to be a better choice for exercising.
A typical tricycle comprises a front wheel and two rear wheels. The two rear wheels are secured on a rear wheel axle and rotated in concert with the rear, wheel axle. The conventional tricycle comprise a single rotary driving mechanism for driving the rear wheel axle such that the two rear wheels will be actuated by the single driving mechanism simultaneously. Because there is no any differential gear system in the rear wheel axle, the tricycles may not be turned left or right easily.
The present invention is provided to obviate the above-described disadvantages of the conventional tricycles.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide an exerciser bike having two treadle-typed driving mechanisms for driving the rear wheels respectively and separately and for allowing the exerciser bike to be easily turned with the rear wheels.
The second objective of the present invention is to provide, an exerciser like which is driven by two, treadle-like driving mechanism so that a repeated up-and-down treading exercising is achieved and the user's body can be kept straight up.
In accordance with one aspect of the invention, there is provided an exerciser bike comprising a frame including a front portion having a front wheel and a handle for steering the front wheel, and including a rear portion having two rear wheel axles, two rear wheels rotatably secured to the rear wheel axles, and two treadle-typed driving means for driving the rear wheels separately. The exerciser bike is allowed to be turned with the rear wheels when the rear wheels are actuated with different speeds with the two driving means.
The two driving means each includes a ratchet sprocket wheel secured on the rear wheel axles, a foot support having a middle portion pivotally coupled to the frame at a pivot shaft and having a first end and a second end, a foot pedal secured on the first end of the foot support, and a chain engaged on the ratchet sprocket wheel and having a first end secured to a predetermined point of the foot support and a second end connected to a resilient element and then secured to the second end of the foot support, for allowing the rear wheels and the ratchet sprocket wheels to be driven by the foot supports via the chains.
Further objectives and advantages of the present invention will become apparent from a careful reading of the detailed description provided below, with appropriate reference to the accompanying drawings.
REFERENCES:
patent: 1276587 (1918-08-01), Spaulding
patent: 1587650 (1926-06-01), Johnson
patent: 2118640 (1938-05-01), Bergen
patent: 2185698 (1940-01-01), Wright
patent: 4453729 (1984-06-01), Lucken
patent: 5876052 (1999-03-01), Olson et al.
Boehler Anne Marie
Rosenberg , Klein & Lee
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