Linear drive with hydraulic amplification
US5056414A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 20, 1989 |
| Grant date | Oct 15, 1991 |
| Priority date | — |
| Expiry date | Jun 20, 2009 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B9/12
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A linear drive comprises a hydraulic unit (1), a control valve (5) and an actuating drive (9) with an actuating member (7). These elements are interconnected by means of two inertia drive starters (4, 8), which results in a mechanically-induced return movement. The movement of the piston rod (15) of the hydraulic unit (1) is controlled in the actuating drive (9) by means of active elements (10, 35, 56) moved translationally in the direction of the longitudinal axis of the linear drive. The active elements (10, 35) and the actuating member (7) are connected without play in the axial direction but can counterrotate with respect to each other by means of a bearing (38). A lever (13) is arranged on the actuating member (7) and can be rotated together with the actuating member (7) about the axis (60). The lever (13) cooperates with a stop element (14) which can be adjusted by a rack (50) and which limits the rotation of the lever (13).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.