Brakes – Wheel – Transversely movable
Patent
1997-07-08
1999-09-28
Oberleitner, Robert J.
Brakes
Wheel
Transversely movable
188196BA, 188196V, 188 7962, 74569, F16D 5100
Patent
active
RE0363120
ABSTRACT:
The present invention relates to a cam-operated, self-adjusting brakeshoe which employ single and/or multiple-web brakeshoes. The brakeshoe adjustor includes a roller assembly, a cylindrical roller sleeve, and a pawl assembly. The roller assembly comprises a fixed eccentric roller(s) and spindle arrangement for slidable engagement with a cylindrical roller sleeve(s) which in turn is actuated by the rotation of the cam shaft. At least one portion of the spindle is provided with a ratchet for constant engagement with a mateable pawl. The rotation of the roller sleeve(s) about the eccentric roller(s) is limited by the arcuate distance of a slot contained about the edge of the roller sleeve within which a pin, radially extending from the roller, is engaged. In one embodiment, the pawl assembly comprises (i) at least one bracket sleeve for slidable engagement with a corresponding web end of the brakeshoe and having an opening for slidably receiving one of the extensions of the spindle therethrough; and (ii) at least one pawl secured to the side of the bracket sleeve for engagement with the ratchet about the spindle to permit rotation of the spindle in one direction only, the effect of which will be to restrain the combined spindle and eccentric roller(s) from turning in the direction of actuation of the cam shaft.
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Brakes: An Update, Fleet Equipment, vol. 18, No. 19, Oct. 1992.
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Lipka Pamela J.
Oberleitner Robert J.
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