Abstract A filter for a hydraulic system which filter is mounted within the reservoir containing the hydraulic fluid supply. The filter comprises a yieldably mounted cylinder element that is normally biased towards a closed filtering position, said filter element being adapted to yield to an open position at such times as porous side walls of the filter element become clogged to the extent that a predetermined back pressure is imposed by the filter element on the flow passing therethrough. The apparatus is further characterized by a filter condition sensing and indicating means that senses only that pressure build-up within the filter element which is caused by clogging of the porous walls of the element. Hence, false condition indications due to flow surges inherent in filtered systems are eliminated.
Inventors
👤 R Raymond
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-28 19:44
CPC Classifications
B; B01; B01D; B01D35/00; B01D35/14; B01D35/143
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
139 words
A reservoir and filter apparatus comprising, in combination, reservoir means for containing a bath of fluid to be filtered and including a reservoir wall provided with a filter access port; a filter and filter condition indicating apparatus mounted on said reservoir wall and extended through said filter access port and into said Bath, said apparatus being removable from said reservoir means as an assembly and comprising (a) a hollow filter element comprising a porous filter wall and a filter cavity provided with a filter inlet orifice; (b) by-pass means for bypassing hydraulic fluid past said filter inlet orifice upon clogging of said porous wall; (c) a pressure detector tube including an inner detector tube port disposed in said filter cavity and an outer detector tube port; (d) and a filter condition indicator connected to said outer detector tube port.
Claim 2
Dependent Claim
139 words
A reservoir and filter apparatus comprising, in combination, reservoir means for containing a bath of fluid to be filtered and including a reservoir wall provided with a filter access port; a filter and filter condition indicating apparatus mounted on said reservoir wall and extended through said filter access port and into said Bath, said apparatus being removable from said reservoir means as an assembly and comprising (a) a hollow filter element comprising a porous filter wall and a filter cavity provided with a filter inlet orifice; (b) by-pass means for bypassing hydraulic fluid past said filter inlet orifice upon clogging of said porous wall; (c) a pressure detector tube including an inner detector tube port disposed in said filter cavity and an outer detector tube port; (d) and a filter condition indicator connected to said outer detector tube port.
Claim 3
Dependent Claim
80 words
The reservoir and filter apparatus of claim 1 wherein said reservoir means includes a second reservoir wall provided with a reservoir port for the flow of fluid through the reservoir means and a first mounting shoulder for said filter and filter condition indicating apparatus; and wherein said filter and filter condition indicating apparatus includes a housing portion provided with a housing port communicating with said reservoir port and a second mounting shoulder removably connected to said first mentioned mounting shoulder.