Apparatus for driving screws mountable on a drive unit
US6330841A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2000 |
| Grant date | Dec 18, 2001 |
| Priority date | — |
| Expiry date | Mar 14, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25B23/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A screw holder mountable on a drive unit having a tubular passage with two axially-aligned sections, each provided with locking and centering elements, such that a screw inserted into such holder can initially only penetrate until the screw head is reliably held and suspended in the first section by the locking elements. The force of the centering and locking elements upon the screw head is overcome when the apparatus is placed on the screw location and an engagement tool coupled to a drive shaft is brought into driving engagement with the screw head, which driving movement forces the locking elements radially outward in response to the axial load upon the screw head and the passage of the screw head therethrough. After the screw head passes through the first section within the tubular passage, the screw shaft is engaged by the centering elements of the second section. The centering elements of the second section are then also forced back as the head of the screw passes therethrough.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.