Brakes – Vehicle – Railway
Patent
1979-12-04
1982-01-05
Valenza, Joseph E.
Brakes
Vehicle
Railway
104 17R, B61H 712
Patent
active
043089372
ABSTRACT:
Disclosed herein are novel imporvements in a clamping apparatus adapted to grip the sides of a clamped member and, more specifically, the sides of rails such as those used for cranes and railroads. The clamping apparatus includes a frame adapted for primary movement relative to and substantially parallel with the clamped member, and secondary movement substantially perpendicular to the sides of the clamped member. Secured to the frame, in opposed relation to the clamped member, are lateral guides. A pair of yokes, including clamp guides and lever centering surfaces is slidably mounted in the lateral guides for movement substantially perpendicular to the sides of the clamped member. A pair of clamp levers, having clamping surfaces in opposed relation to the sides of the clamped member, are pivotally mounted intermediate their ends in the pair of yokes. An actuating link is pivotally connected to the other end of each clamp lever. A linear actuator is pivotally mounted in the frame axis substantially parallel with the clamped member. The actuating links are pivotally connected to the linear actuator. In both engaged and released modes of the apparatus, the clamping surfaces and yoke move in the lateral guides to compensate for the secondary movement of the frame and to align the surfaces with the sides of the clamped member. In their retracted position, the clamp levers are centered relative to the clamped member and the clamping surfaces are protected from contact with the clamped member by the clamp guides.
REFERENCES:
patent: 2856030 (1958-10-01), Snow
patent: 3552320 (1971-01-01), Traupmann
patent: 3722629 (1973-03-01), Totschnig
patent: 3972392 (1976-08-01), Johnson
patent: 4236608 (1980-12-01), Kobelt
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