Land vehicles – Wheeled – Occupant propelled type
Reexamination Certificate
1999-03-01
2001-03-27
Boehler, Anne Marie (Department: 3618)
Land vehicles
Wheeled
Occupant propelled type
C280S220000, C280S240000, C280S304000
Reexamination Certificate
active
06206394
ABSTRACT:
BACKGROUND OF THE INVENTION
I. Field of the Invention
This invention relates generally to exercise equipment, and more particularly to relates to versatile health exercise equipment that may be utilized as either a stationary exercising device or as a transport vehicle that exercises both the upper and lower body. The exercise apparatus of the present invention is propelled by a simulated rowing motion, wherein the length of the rowing stroke and amount of force required for rowing is adjustable to thereby maximize the efficiency and/or effectiveness of exercising the user's upper and lower body. The exercise apparatus of the present invention further includes an improved stabilizing member and drive mechanism. The exercise apparatus of the present invention simulates the rowing motion of a scull, utilizing and exercising the major muscle groups of both the upper and lower body.
II. Discussion of the Related Art
For many years the bicycle has been used as an economic mode of transportation. The typical bicycle is foot powered, wherein foot pedals are connected to crank shafts which in turn rotate a sprocket that is chain linked to the rear wheel. The use of such a bicycle is an excellent workout for the lower body, however, the upper body muscles are not equally exercised. The only significant exercise to the upper body muscles occurs when the user steers the bicycle using the upper body muscles for steering.
Various rowing type vehicles have been devised, whereby a rowing motion powers the vehicle. The following patents describe vehicles powered by a simulated rowing motion: Lawrence, U.S. Pat. No. 4,639,007 (hereinafter the '007 patent); McElfresh, U.S. Pat. No. 4,618,160 (hereinafter the '160 patent); Salmon, U.S. Pat. No. 4,700,962 (hereinafter the '962 patent); Mendez, U.S. Pat. No. 4,305,600 (hereinafter the '600 patent); Ellefson, U.S. Pat. No. 4,632,414 (hereinafter the '414 patent); Geller, U.S. Pat. No. 4,796,907 (hereinafter the '907 patent); International PCT application WO 94/18059 (hereinafter the WO patent); and Horst, European Patent No. 461,286 A1 (hereinafter the '286 patent). None of these patents show or describe a slide rail and support member in vertical alignment, a lever arm used to row the vehicle containing a portion of the drive mechanism within the lever arm, and/or the lever arm rotatably attached to the vehicle below the slide rail. Each of the drive mechanisms disclosed by the prior art is exposed to the user. The user's clothing or accessories can easily catch in the drive mechanism, potentially creating a hazardous situation to the user. Hence, there is a need for a rowing type vehicle that reduces the amount of drive mechanism exposed to the user.
Lawrence, in the '007 patent, discloses a low clearance exercise cart having four wheels. The user sits on a seat of the cart and pushes against foot pedals. The foot pedals slide on a rail and are attached to a drive mechanism. The drive mechanism includes a cable attached at one end to the foot pedals and the other end is attached to a wind-up pulley and rear axle. As the foot pedals are pushed forward, the cable rotates the pulley and rear axle, thereby moving the cart forward. A spring connected to the foot pedals tends to return the foot pedals to their rearward position. At this point, a wind up spring causes the cable to rewind on the pulley. A second cable is attached at one end to a second wind-up pulley and rear axle and at the other end to a hand bar. When the hand bar is pushed forward, the rear axle rotates, thereby moving the cart forward.
The cart disclosed by Lawrence is limited in several respects. First, the drive mechanism is not variable. When traveling up a steep hill, it may become impossible for the user to supply enough force against the foot pedals to move them forward. Second, the handle bar powers the rear axle when the bar is pushed forward. Generally, a user can supply a greater force by pulling compared to pushing. When traveling up a steep hill, it may likewise be impossible for the user to supply enough force against the handle bar to push it forward. Third, the cart disclosed requires a wide riding path. Hence, there is a need for a narrow vehicle that is easily operable in varying terrain.
The carts disclosed in the '907 and '414 patents are likewise limited by the width of the front axle. A front axle having a wheel connected on each end is provided to increase the stability of the cart. Also, a chain or cable forming part of the drive mechanism is attached to a lever arm between the handle bar and fulcrum of the lever arm, requiring additional pulleys. Neither the '907 or '414 patent disclose positioning the fulcrum between the handle bar and the chain.
Salmon in the '962 patent discloses a three wheeled rowing type vehicle. Cables link a rotation axis of the seat to the front fork. By leaning to one side or the other, the front fork is rotated, thereby steering the vehicle. There are situations, for example riding over bumps, where the user unintentionally leans to one side without wanting to alter the course of propulsion. In this instance, the imbalance of the vehicle is compounded, making the vehicle difficult to steer. The present invention overcomes these and other disadvantages of the prior art.
SUMMARY OF THE INVENTION
The present invention overcomes these and other disadvantages by providing an exercise apparatus that is powered by a simulated rowing motion, wherein the length of the rowing stroke and amount of force required for rowing is adjustable to thereby maximize the efficiency and/or effectiveness of exercising the user's upper and lower body. The exercise apparatus includes a handle bar and lever arm pivotally mounted to a unshaped frame and connected to a drive mechanism. A seat slides on a slide rail, allowing the user to push and pull against a lever arm and footrest connected to the frame. The user propels the exercise apparatus by pushing and pulling the lever arm in a rowing motion using upper body muscles, while sliding in unison on the slide rail, using lower body muscles. A steering device is connected to the handle bar and front fork of the exercise apparatus, allowing the user to steer the exercise apparatus during the rowing motion.
Without limitation, components of the frame and lever arm are manufactured from a hollow tubular alloy and are extruded to form the desired shape. The main frame or support member is attached to a lower portion of the slide rail and extends downward from the slide rail such that the slide rail and support member or frame lie in a central vertical plane of the apparatus. The seat is slidably mounted on the slide rail, whereby a user may sit on the seat and slide between a first forward position and a second rearward position. The front fork is attached to a front portion of the frame or slide rail and a rear fork is attachable to a rear portion of the frame or slide rail. The front and rear wheels are rotatably mounted to the front and rear fork, respectively.
The frame, front and rear forks, and slide rail are dimensioned such that when the wheels are attached, the slide rail angles slightly forward relative to the riding surface plane. The slight angle creates added resistance when the user is sliding rearward, thereby requiring the user to exert an additional force with the leg muscles.
The lever arm is rotatably attached about its fulcrum to a portion of the frame or support member. The lever arm's fulcrum is adjustable and the point of attachment on the support member is adjustable, allowing the user to change the amount of torque provided by the lever arm and the arc the lever arm passes through as the lever arm is rotated between the fore and aft positions. As the lever arm pivots about its fulcrum, the frame traverses through a window formed in the lever arm. In this manner, the stability and durability of the exercise apparatus are enhanced.
The steering handle bar is preferably pivotally attached to an upper end o
Olson Scott B.
Sauter David P.
Boehler Anne Marie
Nikolai, Mesereau & Dietz, P.A.
O.S. Designs, Inc.
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