Protective boot for solenoid
US4407517A · kind A · utility
12Cited by
6References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 6, 1982 |
| Grant date | Oct 4, 1983 |
| Priority date | — |
| Expiry date | Dec 6, 2002 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16J3/041
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A protective boot of resilient elastomer material comprising a fixed end sealable around a housing opening through which the reciprocal shaft of a solenoid or like device extends and having a movable end sealed to the shaft includes a fluid chamber interconnecting the fixed and movable ends of the boot; the fluid chamber has an unstressed length exceeding the length of the shaft stroke and is formed by a plurality of concave wall portions each extending axially of the shaft, the concave wall portions being forced outwardly of the shaft during retraction movement so that the volume in the fluid chamber remains generally constant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.