Apparatus for rotating and displacing in axial direction a machine element
US4005641A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1974 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Dec 23, 1994 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/5008
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An apparatus for selectively moving, for instance alternately or simultaneously rotating and displacing in axial direction, a machine element mounted to be rotatable and axially displaceable, comprising a motor, a hollow cylinder and a piston displaceable in said hollow cylinder. The piston is provided with a connection element for rigidly connecting it with the machine element. The piston also has a lengthwise extending opening which is sealed towards the outside at the side of the connection element and at the other end there extends into said lengthwise extending opening a drive shaft connected with said motor. This drive shaft at the side of the connection element has an end which together with the inner surface of the piston forms a first sealing section forming a sealed sliding seat, said drive shaft at the region of its end connected with the motor possessing a second sealing section which together with the hollow cylinder or an element rigidly connected therewith forms a tightly closing sliding seat. The piston and the drive shaft possess coupling means disposed between both of the sealing sections, said coupling means rigidly rotatably connecting the piston and the drive s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.