Scotch yoke having a curved track

Details Scotch yoke having a curved track Scotch yoke having a curved track

1979-06-19

1981-06-16

Staab, Lawrence J.

Machine element or mechanism

Mechanical movements

Rotary to or from reciprocating or oscillating

30394, B27B 1102, F16H 2118

Patent

active

042729963

ABSTRACT:
For a power tool having a reciprocating drive mechanism, an improved one-piece scotch yoke having a curved track design which substantially eliminates the contact pressure between the yoke and guides created in conventional straight track designs by the couple on the reciprocating yoke shaft imposed by the non-collinear blade and crank loads. The radius of curvature of the yoke track is preferably equal to the distance from the shaft bearing to the crank pin at its mid-stroke position where the velocity of the yoke is greatest.

REFERENCES:
patent: 245771 (1881-08-01), Bond
patent: 543768 (1895-07-01), Haag
patent: 644014 (1900-02-01), Jackson
patent: 735717 (1903-08-01), Dalmas
patent: 1505856 (1924-08-01), Briggs
patent: 1621103 (1927-03-01), Brumell
patent: 2931402 (1960-04-01), Papworth
patent: 3451276 (1969-06-01), Wadlow et al.
patent: 3890708 (1975-06-01), Bauer

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