Solenoid with movement dampener
US5710532A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 12, 1995 |
| Grant date | Jan 20, 1998 |
| Priority date | — |
| Expiry date | May 12, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F7/088
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A solenoid having a controlled rate of motion is provided. The solenoid includes a housing having a channel disposed therein, a coil disposed around the channel for providing an electromagnetic force in response to a current being supplied therethrough, and a plunger disposed within the channel and movable between a first position and a second position in response to the presence or absence of the electromagnetic force. A dampener is linked to the plunger which creates an atmospheric pressure differential as the plunger moves to one or both of the first position or the second position which pressure differential acts to slow the rate of movement of the plunger.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.