Back to results
US 6,662,455 B2Granted
Cutting mechanism for a saber saw
AssigneeHitachi Koki Co., Ltd.
InventorsToshihiko Tachibana, Yoshio Osada
Life of this patent
Estimating the term…
Abstract
Two different eccentric shaft portions are formed on a secondary shaft. A contact plate has two different contact portions which are selectively brought into contact with two eccentric shaft portions of the secondary shaft. The contact plate is attached to a guide sleeve. A plunger is slidably coupled in the guide sleeve. A saw blade, attached to a front end of the plunger, causes an orbital motion according to a phase difference between two eccentric shaft portions regardless of attached direction (i.e., normal or upside-down) of the saw blade.
Claims33
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 causing 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;
- and
- a second motion converting mechanism interposed between said driven shaft and said plunger for converting the rotational motion of said driven shaft into swing motion of said plunger,
- wherein
- a plurality of eccentric shaft portions are formed on said driven shaft;
- and
- said second motion converting mechanism includes contact portions selectively brought into contact with said eccentric shaft portions of said driven shaft.
7 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 causing reciprocative motion with respect to said housing and having a front end to which a saw blade is attached;
- a guide sleeve slidably holding said plunger so as to allow said reciprocative motion 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;
- and
- a second motion converting mechanism interposed between said driven shaft and said plunger for converting the rotational motion of said driven shaft into swing motion of said plunger,
- wherein
- first and second eccentric shaft portions are formed on said driven shaft;
- and
- said second motion converting mechanism includes a guide member attached to said guide sleeve, said guide member having first and second contact portions selectively brought into contact with said first and second eccentric shaft portions of said driven shaft.
8 more elements
A saber saw comprising:
- a housing for accommodating a motor;
- a bevel gear rotatably supported by said housing and rotated by said motor;
- a plunger causing reciprocative motion with respect to said housing and having a front end to which a saw blade is attached;
- a guide sleeve slidably holding said plunger so as to allow said reciprocative motion 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 bevel gear and said plunger for converting rotational motion of said bevel gear into the reciprocative motion of said plunger;
- and
- a second motion converting mechanism interposed between said bevel gear and said plunger for converting the rotational motion of said bevel gear into swing motion of said plunger,
- wherein
- first and second slant surfaces are formed on said bevel gear;
- and
- said second motion converting mechanism includes a guide member attached to said guide sleeve, said guide member having first and second contact portions selectively brought into contact with said first and second slant surfaces of said bevel gear.
8 more elements
Dependencies are inferred from the claim text.