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US 6,634,107 B2Granted
Cutting mechanism for a saber saw
AssigneeHitachi Koki Co., Ltd.
InventorYoshio Osada
Life of this patent
Estimating the term…
Abstract
A counterweight is provided to cancel axial vibration of a plunger of a saber saw. Swing rollers, rotatably supported at both ends of a roller shaft provided at a rear end of the plunger, interpose between a pair of opposing tracks formed in an axially elongated groove formed on the counterweight.
Claims7
A saber saw comprising:
- a housing for accommodating a motor;
- a driven shaft rotatably supported by said housing and rotated by said motor;
- a plunger capable of reciprocative motion with respect to said housing and having a front end to which a saw blade is attached;
- a first motion converting mechanism interposed between said driven shaft and said plunger for converting rotational motion of said driven shaft into the reciprocative motion of said plunger;
- a counterweight causing reciprocative motion with respect to said housing;
- a second motion converting mechanism interposed between said driven shaft and said counterweight for converting the rotational motion of said driven shaft into the reciprocative motion of said counterweight;
- and
- a pair of opposing tracks formed on said counterweight so as to extend in a direction substantially parallel to a reciprocating direction of said plunger, so that guide means of said plunger reciprocates along one of said opposing tracks formed on said counterweight while maintaining a clearance between said guide means and the other of said opposing tracks.
5 more elements
A saber saw comprising:
- a housing for accommodating a motor;
- a driven shaft rotatably supported by said housing and rotated by said motor;
- a plunger capable of reciprocative motion with respect to said housing and having a front end to which a saw blade is attached;
- a guide sleeve holding said plunger and being hingedly supported about a pivot fixed to said housing so that said guide sleeve can swing in a direction normal to a reciprocating direction of said plunger;
- a first motion converting mechanism interposed between said driven shaft and said plunger for converting rotational motion of said driven shaft into the reciprocative motion of said plunger;
- a counterweight causing reciprocative motion with respect to said housing;
- a second motion converting mechanism interposed between said driven shaft and said counterweight for converting the rotational motion of said driven shaft into the reciprocative motion of said counterweight;
- a pair of opposing tracks formed on said counterweight and extending in a direction substantially parallel to a reciprocating direction of said plunger, so that said plunger reciprocates along one of said opposing tracks formed on said counterweight;
- a roller shaft provided at a rear end of said plunger so as to extend in a direction normal to said reciprocating direction of said plunger and inserted in an elongated hole opened on said guide sleeve;
- and
- swing rollers rotatably supported at both ends of said roller shaft so as to roll along one of said opposing tracks formed on said counterweight while maintaining a clearance between each swing roller and the other of said opposing tracks.
8 more elements
Dependencies are inferred from the claim text.