Counterbalanced reciprocating mechanism
Patent 5079844 Issued on January 14, 1992. Estimated Expiration Date: 
November 13, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 13, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 3170496 3863342 Saber saw Cutting apparatus Thrust bearing arrangement for a power tool transmission Patent #: 4976164 InventorAssigneeApplicationNo. 612525 filed on 11/13/1990US Classes:30/392, With means to reciprocate saw30/393, In uniplanar compound path74/50Slidable connections (e.g., scotch yoke)ExaminersPrimary: Watts, Douglas D.Assistant: Heyrana, Sr., Paul M. Attorney, Agent or FirmInternational ClassesB23D 049/16B23D 049/00 F16H 021/18 AbstractThe motor drives the crown gear which has an upwardly projecting eccentric drive pin which drivingly engages the channel fixed on the spindle which reciprocates in the fixed tube and supports a saw blade. The induced vibration is counterbalanced by the reciprocating counterbalance which slides on the outside of the tube. The crown gear has a cylindrical drive member which engages the cylindrical hole in the transfer block. The transfer block is moved in an orbital path and the opposed parallel sides engage and reciprocate the counterweight. The crown gear and cylindrical drive member have material removed to counterbalance the two drives. | |
