Pedal stroke adjuster for a bicycle or exercise machine

Details Pedal stroke adjuster for a bicycle or exercise machine Pedal stroke adjuster for a bicycle or exercise machine

1983-10-05

1987-03-10

Smith, Gary L.

Machine element or mechanism

Elements

Cranks and pedals

745944, 74600, G05G 114

Patent

active

046482873

ABSTRACT:
A pedal stroke adjuster includes a pair of crank frames each of which is mounted on one of the crank arms of a bicycle or exercise machine. A mounting bracket, mounting blocks and spacers are used to align each crank frame in a vertical position when connected to a crank arm. The sides of the crank frame provide guide rails for a pedal mounting block and in one embodiment of the invention one of the guide rails is notched to receive a spring-loaded detent latch that is located in the pedal mounting block. A finger operated release mechanism is provided so that the latch may be removed from the notch and the position of the pedal mounting block changed. In an alternate embodiment, each guide rail is notched. The notches are offset so that the detent latches can be readily contained in the confined space of the block. In another embodiment of the invention, a threaded rod is used to move the pedal mounting block up and down within the crank frame and along the guide rails. Yet another embodiment of the invention, provides threaded apertures spaced along the pedal mounting bar that is attached to the crank arm as described hereinabove.

REFERENCES:
patent: 359609 (1887-03-01), Jeffery
patent: 363522 (1887-05-01), Knous
patent: 385717 (1888-07-01), Kibbe
patent: 394135 (1888-12-01), Roedel
patent: 421969 (1890-02-01), Pond
patent: 426670 (1890-04-01), Keating
patent: 446280 (1891-02-01), Blakely
patent: 1227743 (1917-05-01), Burgendorff
patent: 2533011 (1950-12-01), Hill
patent: 3081645 (1963-03-01), Bergfors
patent: 3789696 (1974-02-01), Beam, III
patent: 3888136 (1975-06-01), Lapeyre

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