Drain mechanism and fluid filter including drain mechanism
US8512562B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 2, 2009 |
| Grant date | Aug 20, 2013 |
| Priority date | — |
| Expiry date | May 15, 2031 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D35/16
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A drain mechanism includes: a cap that is attached detachably to a case of a fluid filter and formed with a drain hole, and includes an engaging projecting portion to which an engaging portion of a drain pipe inserted into the drain hole is engaged; and a valve member that is provided in the interior of the cap so as to close the drain hole and displaced in a direction for releasing closure of the drain hole upon contact with a tip end portion of the pipe inserted into the drain hole. The valve member is provided with a holding recess portion for holding the tip end portion of the pipe. A contact portion contacted by the tip end portion of the pipe is provided inside the holding recess portion of the valve member. When a tip end side of the engaging portion of the pipe inserted into the drain hole is in contact with a rear end side of the engaging projecting portion of the cap, an interval between a contact tip end of the engaging portion and the engaging projecting portion and an open end of the holding recess portion of the valve member closing the drain hole is longer than an interval between the contact tip end of the engaging portion and the engaging projecting portion and a t…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.