Hydraulic tapping apparatus
US4050835A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1976 |
| Grant date | Sep 27, 1977 |
| Priority date | — |
| Expiry date | Feb 2, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T408/6793
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Apparatus for heavy duty tapping operations includes a compact, lightweight, hydraulic tool unit and a remote hydraulic power unit, with the entire apparatus being designed for portability. The tool unit includes an elongated housing having a high torque, low speed hydraulic motor with internal reduction gearing, for directly driving a spindle supported in the housing for rotation and longitudinal movement. The spindle includes a lead screw coacting with a lead nut mounted at the spindle end of the housing. The spindle is directly driven by the motor drive shaft through a spline drive coupling; and the spindle is fully supported by the lead nut and drive coupling. Reversing and stop control devices control the tapping and retracting limits of movement of the spindle; and the design provides for minimum damage to the tool unit in the event of failure of the reversing or stop control devices. The remote power unit includes a reservoir for hydraulic fluid, a hydraulic pump and electric drive motor, reversing valve, and electric controls for operating the tool unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.