The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 30, 2019
Filed:
Dec. 15, 2017
Applicant:
Yamashin-filter Corp., Kanagawa, JP;
Inventors:
Assignee:
YAMASHIN-FILTER CORP., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D 36/00 (2006.01); B01D 29/33 (2006.01); B01D 35/00 (2006.01); F15B 1/26 (2006.01); F15B 21/04 (2019.01); B01D 19/00 (2006.01); F01M 1/10 (2006.01); F16N 39/00 (2006.01); F15B 21/044 (2019.01); B01D 35/027 (2006.01); B01D 35/147 (2006.01); B01D 29/21 (2006.01); B01D 29/92 (2006.01); B04C 3/06 (2006.01); F16N 29/00 (2006.01); B04C 3/00 (2006.01); B04C 9/00 (2006.01);
U.S. Cl.
CPC ...
B01D 36/001 (2013.01); B01D 19/0057 (2013.01); B01D 29/21 (2013.01); B01D 29/33 (2013.01); B01D 29/925 (2013.01); B01D 35/005 (2013.01); B01D 35/027 (2013.01); B01D 35/147 (2013.01); F01M 1/10 (2013.01); F15B 1/26 (2013.01); F15B 21/04 (2013.01); F15B 21/044 (2013.01); F16N 39/002 (2013.01); B04C 3/06 (2013.01); B04C 2003/006 (2013.01); B04C 2009/002 (2013.01); F01M 2001/1035 (2013.01); F16N 29/00 (2013.01);
Abstract
A return filter is provided in a tank, for removing bubbles from hydraulic oil before returning the hydraulic oil to the tank. A vortex forming portion that includes a spiral-shaped blade member is provided in an outflow portion that has a substantially cylindrical shape and communicates with a hollow portion of a filter element. Thus, a vortex forms in the hydraulic oil flowing through the outflow portion and bubbles contained in the hydraulic oil are collected.