Master cylinder with combined reservoir cover, seal and fluid level sensor assembly
US4047048A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1976 |
| Grant date | Sep 6, 1977 |
| Priority date | — |
| Expiry date | Apr 12, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H35/18
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A master cylinder assembly has a stamped steel reservoir and a cover in which a switch, appropriate electrical conduits, and a connector are integrally molded. A fluid level sensor float and rod are arranged to open and close the switch depending upon the level of fluid in the reservoir. A diaphragm seal is assembled to the underside of the cover and has a rod guide provided for the sensor rod. The guide also provides a suitable vent between the fluid chamber of the reservoir and the otherwise sealed space between the diaphragm and the cover. The cover has a peripheral channel receiving a peripheral mounting edge of the diaphragm so that the diaphragm also acts as a seal between the cover and the reservoir housing. The sealing action is primarily radial, between a channel wall and the reservoir housing wall, therefore not requiring the cover to be tightly clamped in place in order to compress a seal. The cover assembly is snapped into place on the reservoir housing. The reservoir also has a plastic inserted baffle dividing the reservoir into a plurality of baffled chambers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.