Reciprocating tool
AssigneeMakita Corporation
InventorsYosuke Naoi, Yasushi Ogura
Life of this patent
Estimating the term…
Abstract
A reciprocating saw serving as reciprocating tool is equipped with a motor, a drive transmission mechanism that converts rotation of the motor into reciprocating motion, a rod that is connected to the drive transmission mechanism and that engages in reciprocating motion, and an upper roller and a lower roller that are capable of rolling and that have depressed portions that are capable of coming in contact with the rod, wherein the cross-section of the rod has no corners, and the depressed portions of the upper roller and the lower roller have hourglass-like profiles.
Claims21
A reciprocating cutting tool comprising:
- a motor with a rotational output;
- a reciprocating motion conversion mechanism operatively connected to the motor;
- a rod that is connected to and driven by the reciprocating motion conversion mechanism to reciprocate linearly along its entire length;
- and
- a roller that is capable of rolling and that has a contacting surface configured to contact the rod,
- wherein:
- a cross-section of the rod has no corners;
- the roller has a longitudinal axis and a shape of a spool such that the contacting surface is an exterior surface of the roller between ends of the roller that, in cross section along the longitudinal axis of the roller, (1) has a maximum distance from the longitudinal axis of the roller at the ends of the roller, (2) has a minimum distance from the longitudinal axis of the roller at the midpoint of the exterior longitudinal surface, and (3) is an arcuate surface between the maximum distance and the minimum distance;
- the rod has a longitudinal axis that is a straight line;
- the reciprocating motion conversion mechanism includes (1) a rotating gear with a rotation axis perpendicular to the longitudinal axis of the rod and (2) a shaft in the rotating gear that is operatively connected to the rod to cause the rod to reciprocate and has a longitudinal axis that is parallel to but offset from the rotation axis of the rotating gear.
A reciprocating cutting tool comprising:
- a motor with a rotational output;
- a reciprocating motion conversion mechanism operatively connected to and driven by the motor;
- a rod that is connected to and driven by the reciprocating motion conversion mechanism to reciprocate linearly along its entire length;
- a roller assembly configured to contact the rod and direct the rod in a linear direction as the rod reciprocates;
- and
- a housing that houses the reciprocating motion conversion mechanism, the rod and the roller assembly;
- wherein:
- the rod has a longitudinal axis that is a straight line;
- the reciprocating motion conversion mechanism includes (1) a rotating gear with a rotation axis perpendicular to the longitudinal axis of the rod and (2) a shaft in the rotating gear that is operatively connected to the rod to cause the rod to reciprocate and has a longitudinal axis that is parallel to but offset from the rotation axis of the rotating gear;
- an outer roller rotatably surrounding the inner roller;
- wherein the outer roller engages the rod;
- and wherein the outer roller has (a) a longitudinal axis, (b) a contacting surface configured to contact the rod, and (c) a shape of a spool such that the contacting surface is an exterior surface of the outer roller between ends of the outer roller that, in cross section along the longitudinal axis of the outer roller, (1) has a maximum distance from the longitudinal axis of the outer roller at the ends of the outer roller, (2) has a minimum distance from the longitudinal axis of the outer roller at the midpoint of the exterior longitudinal surface, and (3) is an arcuate surface between the maximum distance and the minimum distance.
Dependencies are inferred from the claim text.