Impact tool with collapsible member to compensate for thermal expansion
US12304034B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 12, 2024 |
| Grant date | May 20, 2025 |
| Priority date | — |
| Expiry date | Feb 12, 2044 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25F5/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An impact power tool includes a motor, an output shaft to which a tool bit is attachable for performing work on a workpiece, and an impact mechanism disposed between the motor and the output shaft for converting a continuous torque output from the motor to discrete pulses of torque upon the output shaft, the impact mechanism including a cylinder assembly, a cavity defined within the cylinder assembly containing a hydraulic fluid, and a collapsible member having a first end and a second end opposite the first end. The collapsible member is maintained in a shape coinciding with that of the cavity by fitment within the cavity, with the first and second ends being disconnected from each other. The collapsible member is collapsible to compensate for thermal expansion of the hydraulic fluid during operation of the impact mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.