Fluid pressure operated electrical switch
US4400602A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 1981 |
| Grant date | Aug 23, 1983 |
| Priority date | — |
| Expiry date | Apr 3, 2001 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/38
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A fluid pressure operated electrical switch has a piston element subject to an operating fluid pressure on its acting end face for actuating an electrical switch. The switch employs a limiting member for limiting motion of the piston element to a predetermined extent in order to prevent the switch from being damaged due to overstroke of the piston element. The limiting member includes a flange at the rearmost end of the piston element and an annular shoulder in a bushing which is closely fitted within a port of a switch body for the operating fluid pressure. The piston element is loosely fit in the bushing with the flange in engagement within the shoulder of the bushing such that the flange and shoulder cooperate to provide limitation of the stroke of the piston element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.