Quick release for helically-threaded drive unit
US4322022A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1980 |
| Grant date | Mar 30, 1982 |
| Priority date | — |
| Expiry date | Mar 19, 2000 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/19735
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
The drive train of the threadably advanced piston for a power caulker is provided with a quick release feature. When this feature is activated, the active portions of the drive nut of a lead screw in the drive train are disconnected from the lead screw so that internal pressure in the supply chamber of the cartridge may quickly equilibrate itself by pushing the piston and its lead screw backwards. Thus, dispensing may be smartly stopped and sharply curtailed, merely by releasing the trigger on the power hand tool and activating the quick release. Either of these acts may be performed first or both may be performed simultaneously. By preference, the quick release feature includes threaded claws that are cammed into and out of driving relation with the lead screw by a simple twist of the drive nut.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.