公开(公告)号：US20230321805A1

公开(公告)日：2023-10-12

申请号：US18295633

申请日：2023-04-04

Applicant: Melvelle Equipment Corp. Pty Ltd

Inventor： Jason Casboult ,  Ben Holmes

IPC: B25C11/02 ,  E01B29/26

CPC classification number: B25C11/02 ,  E01B29/26

Abstract: The present invention is directed to a handheld railway spike puller. The spike puller is adapted to operate for pulling of a railway spike from a sleeper and its associated sleeper plate. The spike puller is adapted for coupling with a rotational driver in the form of battery-powered impact wrench. The spike puller generally includes a housing assembly being generally elongate and at a proximal end adapted for detachable coupling with the impact wrench, a drive screw substantially housed within the housing assembly, and arranged for rotation via the impact wrench, a slide assembly including an internal thread configured to engage an external thread of the drive screw which on rotation in a forward direction and a reverse direction effects sliding movement of the slide assembly within the housing assembly between an extended position and a retracted position, respectively. The internal and external threads are designed on rotation of the drive screw in the forward direction to release from one another in the extended position of the slide assembly. Biasing means includes a spring operatively coupled to the drive screw. The biasing means is arranged on release of the internal and external threads to urge the slide assembly in the extended position axially toward the drive screw.