Reciprocating saw-blade device

• US 5,155,914 A
• Filed: 01/31/1992
• Issued: 10/20/1992
• Est. Priority Date: 02/01/1991
• Status: Expired due to Term

• Current Assignee: Kioritz Corporation (Yamabiko Corporation)
• Original Assignee: Kioritz Corporation (Yamabiko Corporation)
• Inventors: Ohkanda, Masao
• Primary Examiner(s): Yost, Frank T.
• Assistant Examiner(s): PAYER, HWEI SIU CHOU
• Application Number:
  US07/829,188
• Time in Patent Office: 263 Days
• Field of Search: 30/392, 30/394, 30/208, 30/216, 30/228, 30/369, 30/502, 30/210, 56/123, 56/158, 56/236, 56/242, 83/618, 83/623, 83/628
• US Class Current: 30/369
• CPC Class Codes: B23D 49/006 with contiguous, oppositely reciprocating saw blades

Abstract

A reciprocating saw-blade device includes: a case; a main spindle rotatably supported by the case; bearings respectively arranged in front and rear end sections of the case; upper and lower saw blades protruding forward beyond the case and supported by the bearings in such a manner as to be slidable in the longitudinal direction thereof; eccentric cams formed on the main spindle such as to be axially spaced away from and 180° out-of-phase with respect to each other; connecting rods respectively having big end portions pivotably connected with the eccentric cams and small end portions extending along the saw blades toward the rear end section of the case, where they are pivotably connected with the saw blades; and laterally-curved portions formed on the blades and extending in the longitudinal direction on one side of a middle section of the main spindle.

Claims

1. A reciprocating saw-blade device comprising:

a case;

a main spindle rotatably supported by said case;

bearings respectively arranged in front and rear end sections of said case;

upper and lower saw blades protruding forward beyond said case and supported by said bearings in such a manner as to be slidable in a longitudinal direction thereof;

eccentric cams formed on said main spindle such as to be axially spaced away from and 180°

out-of-phase with respect to each other;

connecting rods respectively having big end portions pivotably connected with said eccentric cams and small end portions extending along said saw blades toward the rear end section of said case, where they are pivotably connected with said saw blades; and

laterally-curved portions formed on said blades and extending in a longitudinal direction parallel to said blades on one side of a middle section of said main spindle.