Counterbalanced reciprocating mechanism
Patent 5025562 Issued on June 25, 1991. Estimated Expiration Date: 
June 20, 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.
June 20, 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 2793661 3590659 3863342 Vibration dampening and heat sink mechanism for a reciprocating power saw Power-driven hand tool Wabble plate engine mechansim Patent #: 4688439 InventorAssigneeApplicationNo. 541093 filed on 06/20/1990US Classes:30/392, With means to reciprocate saw30/393, In uniplanar compound path74/60Wabbler typeExaminersPrimary: Watts, Douglas D.Assistant: Heyrana, Sr., Paul M. Attorney, Agent or FirmForeign Patent References
International ClassesB23D 049/04B23D 049/02 F16H 023/00 AbstractThe reciprocating saw incorporates a counterbalanced reciprocating drive having a jackshaft on which primary and secondary wobble plates are mounted. The wobble plates drive reciprocating saw spindle and a concentric counterweight in opposite directions to cancel out the induced vibrations. The spindle reciprocates in a bearing sleeve having a slot through which the primary wobble arm projects to drive the spindle. The counterweight slides on the outside of the sleeve and has a slot which slides over the primary arm. The secondary arm drives the counterweight. The arms are out of alignment to permit their strokes to overlap without collision. The wobble plates are angled out of 180° so the spindle and counterbalance reverse at the same time. The cutting stroke and speed are increased and vibration is insignificant. The drive has many other uses. | |
