Pneumatic actuator
US4230025A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 1978 |
| Grant date | Oct 28, 1980 |
| Priority date | — |
| Expiry date | Nov 2, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF15B15/10
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pneumatic actuator having a cap-shaped diaphragm cam rigidly attached to a resilient diaphragm retained in an actuator housing. The diaphragm cam is provided with opposed drive slots cut through the wall thereof, and with at least one correction slot cut through the wall at a bottom edge thereof. A drive pin coupled to a drive shaft is rotatably mounted with the drive slot such that a vertical movement of the diaphragm cam produces a rotational movement of the drive pin and the drive shaft. A correction cam having a shape corresponding to that of the correction slot is formed in the actuator housing beneath the correction slot and is firmly seated within the correction slot upon descent of the diaphragm cam to correct any rotational movement of the diaphragm cam.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.