Power pruning shears

• US 3,178,816 A
• Filed: 04/12/1963
• Issued: 04/20/1965
• Est. Priority Date: 04/12/1963
• Status: Expired due to Term

• Current Assignee: Arvin E. Schmid
• Original Assignee: Arvin E. Schmid
• Inventors: Schmid, Arvin E.
• Application Number:
  US04/272,562
• Time in Patent Office: 739 Days
• US Class Current: 30/228
• CPC Class Codes: A01G 3/037 the driving means being an electric motor
• CPC Class Codes: B26B 15/00 Hand-held shears with motor-driven blades

Claims

1. A POWER SHEARING DEVICE COMPRISING AN ELONGATED CASING, A FIRST SHEARING BLADE FIXEDLY MOUNTED ON SAID CASING, A SECOND SHEARING BLADE PIVOTED TO SAID CASING AND BEING SHEARINGLY COOPERABLE WITH SAID FIRST BLADE, A REVERSIBLE ELECTRIC MOTOR MOUNTED IN SAID CASING, A DRIVE SCREW JOURNALED IN SAID CASING MEANS DRIVINGLY CONNECTING SAID MOTOR TO SAID SCREW, A NUT MEMBER THREADED ON SAID SCREW, MEANS DRIVINGLY CONNECTING SAID NUT MEMBER TO SAID SECOND SHEARING BLADE, A PAIR OF SUPPLY CONDUCTORS, MEANS TO CONNECT SAID SUPPLY CONDUCTORS TO SAID MOTOR TO DRIVE SAME IN A DIRECTION TO MOVE SAID NUT MEMBER AND DRIVE SAID SECOND BLADE THROUGH A SHEARING STROKE RELATIVE TO SAID FIRST BLADE, AND MEANS TO REVERSE THE CONNECTIONS OF SAID CONDUCTORS TO SAID MOTOR RESPONSIVE TO MOVEMENT OF SAID NUT MEMBER TO A PREDETERMINED POSITION IN SAID CASING.