Gripper head
US4687241A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1985 |
| Grant date | Aug 18, 1987 |
| Priority date | — |
| Expiry date | Dec 20, 2005 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65H3/22
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A gripper head for the pick-up of a single piece of material from a stack of such pieces. The gripper head is provided with curved needles mounted on the ends of two concentric hollow cylinders. Each hollow cylinder comprises a spiral guide slit. The pitch direction of the guide slit of one cylinder is opposite the pitch direction of the guide slit of the other cylinder. The guide slits cooperate with the gripper head casing to produce rotation of the cylinders in directions opposite to one another during axial advancement of the cylinders within the casing. The cylinders are advanced within the casing by means of a pressure bolt connected to the cylinders. The magnitude of the advancement is determined by the position of an adjustable stop ring located within the casing. In operation, the two sets of curved needles extend from the casing edge and simultaneously rotate in opposite directions in an adjustable and retractable fashion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.