Rotary hammer
US9630307B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2013 |
| Grant date | Apr 25, 2017 |
| Priority date | — |
| Expiry date | Aug 4, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25D2216/0069
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A rotary hammer is adapted to impart axial impacts to a tool bit. The rotary hammer includes a motor, a spindle coupled to the motor for receiving torque from the motor, and a piston at least partially received within the spindle for reciprocation therein. A crank hub is coupled to the motor for receiving torque from the motor. The crank hub defines a rotational axis and includes a socket offset from the rotational axis. A pin includes a first portion at least partially received within the socket and a second portion fixed to the piston. The first portion of the pin is both pivotable within the socket and axially displaceable relative to the socket in response to rotation of the crank hub for reciprocating the piston between a forward-most position within the spindle and a rearward-most position within the spindle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.