Removable filter cap for spring brake actuator
US6378414B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 28, 1999 |
| Grant date | Apr 30, 2002 |
| Priority date | — |
| Expiry date | Jun 28, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60T17/085
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
Disclosed is an easily removable and replaceable filter cap for attachment the caging tool opening in the top of the upper housing of an emergency brake actuator. The cap includes a plurality of ventilation holes and a membrane preferably made of oilophobic and hydrophobic material which allows air to pass into and out of the emergency brake housing, while keeping foreign material out. The present invention may be easily adapted for use on any of a large number of existing emergency brake housing assemblies at minimal cost. When the filter cap of the present invention is installed, breather openings in the housing are plugged so that all air is filtered through the membrane in the cap. In an emergency or service situation, the cap may be easily removed to allow a caging tool to be inserted into the upper housing to release the emergency spring brake. After removal, the cap may be reused or replaced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.