ALEXANDRIA, Va., Jan. 13 -- United States Patent no. 12,522,983, issued on Jan. 13, was assigned to Epiroc Industrial Tools and Attachment LLC (Delhi, Iowa).
"Cordless railroad spike puller" was invented by Jeffery Weatherill (Portland, Ore.), Balakumaran Gopalarethinam (Portland, Ore.) and Brice Helm (Portland, Ore.).
According to the abstract* released by the U.S. Patent & Trademark Office: "A control circuit can be operably coupled to the drive motor, a manually actuatable trigger switch. A pull rod position sensor can be coupled to the control circuit. The pull rod position sensor can be operable to provide at least one of an extended position signal to the control circuit in response to the non-rotating pull rod and the spike puller ...