Control cylinder for pneumatic control devices with signal switches
US5438911A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jan 19, 1994 |
| Grant date | Aug 8, 1995 |
| Priority date | — |
| Expiry date | Jan 19, 2014 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16B2200/30
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A pneumatic control device has a control cylinder with dovetailed guiding means with a guiding rail and a guiding groove for holding and guiding housings of reed-contacts or the like. The cross-sectional area of the substantially trapezoidal guiding rail of the contact housing has not the same shape as the trapezoidal cross-sectional area of the corresponding guiding groove of the control cylinder. Provided both elements (rail and groove) have substantially the same height or depth, the width of the guiding rail at the side adjacent to the contact housing is smaller than the gap width (121) of the guiding groove (12) at its open side. The total width of the guiding rail is unilaterally shortened to a size determined by a circle drawn around an edge at the narrow side of the guiding rail having a radius (133) that is at the maximum equal to the gap width (12) of the guiding groove (12). The spacing (134) between the other edge of the narrow side of the guiding rail (132) and the diametrically opposed outer edge (135) of the guiding rail (132 ) exceeds the gap width (121) of the guiding groove (12).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.