Reciprocal chuck for paving breaker

Details Reciprocal chuck for paving breaker Reciprocal chuck for paving breaker

B - Operations, Transporting

25

D

B25D 17/08 (2006.01) B25D 17/24 (2006.01)

Patent

CA 2188404

A handheld paving breaker (1) includes a reciprocal chuck (40) in a fronthead (20) and an elastic spring (52) for biasing the chuck toward the fronthead, The chuck can move longitudinally, but is restrained from rotation in the fronthead. A moil (28) mounted in the chuck is biased against the work surface by the chuck, to provide better control of the moil, during start-up and operation. Wear pads (130 136) between the spring and members against which the spring is seated improve spring life.

Un marteau (1) de démolition tenu à la main comprend, dans sa partie avant, un mandrin (42) à mouvement alternatif et un ressort qui exerce une sollicitation sur le mandrin en direction de la partie avant. Ce mandrin peut se déplacer dans le sens longitudinal, mais il ne peut pas tourner dans ladite partie avant. Un burin (25), monté dans le mandrin, est pressé par celui-ci contre la surface à travailler, ce qui permet de mieux maîtriser le burin pendant la phase de démarrage de l'opération et l'opération elle-même. La durée de vie du ressort est augmentée grâce à des blocs d'usure (120, 130) placés entre celui-ci et les éléments sur lesquels il repose.

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