Movable working platform

A movable working platform comprising:

• a scaffold including a front frame having a pair of support posts, and a pair of front wheels mounted on opposite sides of a lower end of said front frame, a rear frame having a pair of support posts, and a pair of rear wheels mounted on opposite sides of a lower end of said rear frame, and a scaffolding platform disposed between said front and rear frames;
• a steering mechanism including a steering shaft vertically arranged along said front frame, a handle mounted on an upper end of said steering shaft, and a drive wheel mounted on a lower end of said steering shaft;
• a drive mechanism including a pedal swingably supported by said front frame, a wire member wound on a pulley and reciprocally moved in response to a swinging motion of said pedal, and a one-way clutch for transmitting only a one-way rotation of said pulley to said drive wheel;
• and
• means for adjusting a vertical mounting position of said scaffolding platform between said front and rear frames, and means for adjusting a vertical mounting position of said pedal.

A movable working platform comprising:

• a scaffold including a front frame having a pair of support posts, and a pair of front wheels mounted on opposite sides of a lower end of said front frame, a rear frame having a pair of support posts, and a pair of rear wheels mounted on opposite sides of a lower end of said rear frame, and a scaffolding platform disposed between said front and rear frames;
• a steering mechanism including a steering shaft vertically arranged along said front frame, a handle mounted on an upper end of said steering shaft, and a drive wheel mounted on a lower end of said steering shaft;
• a drive mechanism including a pedal swingably supported by said front frame, a wire member wound on a pulley and reciprocally moved in response to a swinging motion of said pedal, and a one-way clutch for transmitting only a one-way rotation of said pulley to said drive wheel;
• and
• said steering mechanism further includes a front wheel raising mechanism for raising said front wheels so as to retain said drive wheel in a lower position than said front wheels.

A movable working platform comprising:

• a scaffold including a front frame having a pair of support posts, and a pair of front wheels mounted on opposite sides of a lower end of said front frame, a rear frame having a pair of support posts, and a pair of rear wheels mounted on opposite sides of a lower end of said rear frame, and a scaffolding platform disposed between said front and rear frames;
• a steering mechanism including a steering shaft vertically arranged along said front frame, a handle mounted on an upper end of said steering shaft, and a drive wheel mounted on a lower end of said steering shaft;
• and
• a foot-actuated drive mechanism including a foot-actuated pedal pivotally supported by said front frame proximate to the scaffolding platform, a wire member wound on a pulley and reciprocally moved in response to a reciprocating pivoting motion of said pedal, and a one-way clutch for transmitting only a one-way rotation of said pulley to said drive wheel in order to propel the working platform,
• the steering mechanism including a front wheel raising mechanism for raising the front wheels so as to retain said drive wheel in a lower position than said front wheels.