Knockout tools
AssigneeBlack & Decker Inc.
InventorsJose Henrique Waechter, Andre Felipe Breternitz de Souza, Marco Lourenco
Life of this patent
Estimating the term…
Abstract
Power-driven knockout tools are provided, including knockout tool accessory devices for power-driven tools. A plurality of different die sets can be coupled to the knockout tools, for forming openings through rigid plate or sheet material. The knockout tool portion of the tools may include a transmission that provides for sufficient speed reduction and corresponding increase in output torque from an input speed/torque associated with a rotary force input to the transmission to an output speed and an output torque for the pulling of a punch portion of the die set through the rigid sheet or plate material.
Claims23
A knockout tool comprising:
- a housing;
- a transmission received in the housing;
- an input shaft at least partially received in the housing and configured to transmit an input torque to the transmission;
- a driving member at least partially received in the housing and configured to be rotatably driven about a first axis by the transmission, the driving member including a threaded first portion and a second portion proximate the threaded first portion;
- and
- a driven member at least partially received in the housing and configured to be axially moveable along a second axis, the driven member including a coupling portion configured to be coupled to a punch of a die set and a threaded portion engageable with the threaded first portion;
- wherein, during operation, in response to rotation of the input shaft in a first direction, the threaded first portion is rotatably driven by the transmission to engage the threaded portion such that rotation of the driving member about the first axis causes axial movement of the driven member and the punch in a first axial direction along the second axis to form a hole in a workpiece;
- and
- wherein, in response to further rotation of the input shaft, the threaded portion is positioned proximate the second portion causing the threaded first portion and the threaded portion to disengage such that further rotation of the driving member about the first axis does not cause axial movement of the driven member along the second axis.
Dependencies are inferred from the claim text.