Submersible cover for a low pressure accumulator
US5857753A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 20, 1996 |
| Grant date | Jan 12, 1999 |
| Priority date | — |
| Expiry date | Sep 20, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S303/11
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
An accumulator for an anti-lock brake system includes a valve body portion defining an accumulator chamber, an accumulator piston slidably disposed within the accumulator chamber, a spring, and a cover. The accumulator chamber has a fluid inlet for connection to a source of pressurized fluid at a first end of the chamber. The chamber has a second end open to atmosphere. The accumulator piston separates the first end of the chamber from the second end of the chamber. The spring is disposed in the accumulator chamber between the piston and the second end of the chamber and biases the piston toward a first position. The cover closes the second end of the chamber and atmosphere and has micro-porous structure. The micro-porous structure is configured to block water molecules and to pass constituent molecules of air, thereby enabling air to be communicated across while preventing the intrusion of water into the chamber through the second end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.