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A self-propelled exercise device such as a bicycle includes a frame having a drive wheel rotatably supported thereupon. The bicycle includes a first and a second foot link which are powered by the user. A coupler assembly directs the first end of each foot link in an arcuate path of travel, and a fo

A self-propelled exercise device such as a bicycle includes a frame having a drive wheel rotatably supported thereupon. The bicycle includes a first and a second foot link which are powered by the user. A coupler assembly directs the first end of each foot link in an arcuate path of travel, and a foot link guide directs the second end of each foot link in a reciprocating path of travel. A power transfer linkage is in mechanical communication with the coupler assembly and with the drive wheel. When the device is in use, a user's foot disposed upon the foot link travels in an elliptical path of travel and provides power to the foot link. This power is transferred to the drive wheel by the power transfer linkage so as to propel the bicycle.

대표청구항 ▼

A self-propelled exercise device such as a bicycle includes a frame having a drive wheel rotatably supported thereupon. The bicycle includes a first and a second foot link which are powered by the user. A coupler assembly directs the first end of each foot link in an arcuate path of travel, and a fo

A self-propelled exercise device such as a bicycle includes a frame having a drive wheel rotatably supported thereupon. The bicycle includes a first and a second foot link which are powered by the user. A coupler assembly directs the first end of each foot link in an arcuate path of travel, and a foot link guide directs the second end of each foot link in a reciprocating path of travel. A power transfer linkage is in mechanical communication with the coupler assembly and with the drive wheel. When the device is in use, a user's foot disposed upon the foot link travels in an elliptical path of travel and provides power to the foot link. This power is transferred to the drive wheel by the power transfer linkage so as to propel the bicycle. tated in a second direction including an angle with the first direction, and (b) a wheel latching device including a first latching member on the wheel support and a co-operating second latching member on the frame, the first and second latching members being movable relative to one another along the indexing axis between a wheel indexing position, in which the wheel support is rotatable between the first and second indexed positions, and a wheel latching position, in which the latching members latch the wheel support against rotation about the indexing axis, wherein an upper portion of the wheel support and the second latching member provide limited relative movement of the wheel support at least in one direction along the indexing axis and the first latching member is movable relative to the wheel support along the indexing axis between the wheel indexing position and the wheel latching position. 2. The hand-propelled truck as claimed in claim 1, in which the first latching member is provided on a latching member body enclosing a portion of the wheel support and in which the latching members form a plug-and-socket connector device. 3. The hand-propelled truck as claimed in claim 1, in which the wheel support includes a tubular member surrounding a circular cylindrical part of the frame and the first latching member is provided on a sleeve having a non-circular internal cross-section and surrounding said part of the frame, a non-circular part of the second latching member being received in the sleeve in the wheel latching position. 4. The hand-propelled truck as claimed in claim 3, in which the sleeve is a tubular member of rectangular cross-section and the second latching member is receivable in one end of the sleeve upon relative movement of the latching members from the wheel indexing position to the wheel latching position. 5. The hand-propelled truck as claimed in claim 3, in which the latching members are resiliently urged towards the wheel latching position. 6. The hand-propelled truck as claimed in claim 3, in which the wheel support abuts the second latching member in said one direction. 7. The hand-propelled truck as claimed in claim 1, in which the angle included between the first direction and the second direction is 90 degrees.