US3794168A - Filter with condition indicator - Google Patents

Filter with condition indicator Download PDF

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Publication number
US3794168A
US3794168A US00276694A US3794168DA US3794168A US 3794168 A US3794168 A US 3794168A US 00276694 A US00276694 A US 00276694A US 3794168D A US3794168D A US 3794168DA US 3794168 A US3794168 A US 3794168A
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US
United States
Prior art keywords
cylinder
piston
housing
chamber
filter
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00276694A
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English (en)
Inventor
G Perkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Parker Intangibles LLC
Original Assignee
Parker Hannifin Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Parker Hannifin Corp filed Critical Parker Hannifin Corp
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Publication of US3794168A publication Critical patent/US3794168A/en
Assigned to PARKER INTANGIBLES INC., A CORP. OF DE reassignment PARKER INTANGIBLES INC., A CORP. OF DE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: PARKER-HANNIFIN CORPORATION
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/143—Filter condition indicators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
    • B01D35/147—Bypass or safety valves

Definitions

  • filter devices have been provided with mechanical and/or electrically actuated means for indicating the cleanliness condition of the filter element.
  • Electrical indicators in the form of lights are advantageous in that they may be easily read and also lend themselves to mounting at a position remote from the filter assembly.
  • electrically actuated indicators have been used previously to show only the clogged condition of the filter.
  • the present invention is an improved method of sensing and indicating the cleanliness condition of a filter.
  • the sensing mechanism includes a cylinder havinga piston therein that is exposed to fluid pressures upstream and downstream of the filter element to be monitered and which carries an electrical conductor for making a circuit.
  • the cylinder has a common energized contact and one or more smaller contacts leading to a respective number of lights that comprise the indicating mechanism.
  • the piston is moved in the cylinder such that the lights are successively energized in a make before break configuration. Any number of lights may be used to indicate the filter condition at any number of desired stages.
  • the indicating mechanism comprises three lights for indicating when the filter is clean, dirty and bypassing due to being clogged.
  • the cylinder has an opening therein such that when the piston is at or near its furthermost point of travel due to a severely restricted or clogged filter element, fluid passes through the opening to the downstream side of the filter element, thus bypassing the latter.
  • the indicator lights are mounted in a separate housing member that may be mounted on the housing of the sensing mechanism so that it can be easily removed therefrom and displayed remotely.
  • the lights are mounted on the sensing mechanism housing both can be removed as a unit from the filter housing as a unit to facilitate replacement of the filter element.
  • the drawing is a vertical cross-sectional view of the filter device.
  • DETAILED DESCRIPTION Filter assembly includes a generally cylindrical housing 11, preferably of a plastic material such as polybutylene (terephthalate), with an inlet 12 and an outlet 13.
  • Inlet 12 is in a reduced diameter portion 14 that also includes a cylindrical portion 15 and an abutment shoulder 16. r
  • housing 11 is open and has a radial flange and an axially extending annular projection 22.
  • a sensing mechanism housing has a flange 23 with an axial projection 21 threaded into projection 22 to close the open end of housing 11.
  • An O-ring 26 seals the joint between flanges 20 and 23.
  • Sensing mechanism housing 25 is also of plastic or non-conductive material, preferably the same material as housing 11, and includes a cylinder 31 with piston 32 of plastic or other non-electrically conductive material disposed therein.
  • a spring 33 biases the piston against a stop pin 34 mounted on cylinder 31.
  • Cylinder 31 has a vent opening 35 and a flow passage 36 through the side wall thereof.
  • Piston 32 has an annular metal ring 40 disposed in a groove in the outside surface of the piston such that the ring is of substantially the same, or slightly larger diameter than the upper and lower ends of the piston.
  • Cylinder 31 has a narrow and elongated constantly energized contact 41 embedded therein.
  • a wire 42 runs from the contact 41 to a location outside the filter assembly 10 where it is connected to a source of power (not shown).
  • Cylinder 31 also has contacts 43, 44, and 45 connected to contacts 50, 51 and 52 respectively of lights 53, 54, and 55 via wires 56, 57, and 58.
  • Sensing mechanism housing 25 also has an annular flange which extends first radially and then axially and which receives the upper end of a hollow cylindrical filter element 61 which is radially spaced from housing section 1 1 to provide an annular space 67.
  • the lower end of filter element 61 is radially located by reduced diameter portion 15 of housing 11 and is sealed relative to body shoulder 16 by an O-ring 63.
  • Projection 21 has a cylindrical recess 64 into which a cylindrical section 66 of an indicator housing is press fitted.
  • Lights 53, 54, and 55 are mounted in housing 65.
  • Contacts 50, 51, and 52 have a common wire leading from housing 64 to the power source, (not shown).
  • Housing 65 also has an annular mounting flange 76.
  • OPERATION Fluid enters the interior 68 of filter element 61 via inlet 12 and normally passes through the side of the element into annular space 67 and out from the filter assembly 10 via outlet 13.
  • Fluid within element 61 exerts pressure on one side of piston 32 and fluid from space 67 exerts pressure on the other side of the piston via opening 35 and passage 36.
  • the filter is clean there is only a small pressure drop across the element 61 between its interior 68 and space 67 and hence the upward force on the piston due to the difference in pressures acting on opposite sides of the piston is quite small and is overcome by spring 33 for holding the piston against stop 34.
  • metal ring 40 completes a circuit between contacts 41 and 45 to energize light 55.
  • piston 32 has moved far enough to uncover passage 36 to allow fluid within element 61 to pass therethrough to the exterior of cylinder 25 and out through outlet 13 to thus effectively to bypass element 61.
  • Green Filter is clean, full filtration.
  • Yellow Element is dirty. Still full filtration.
  • lights may be made to turn on and off in sequence as described, or they may be made to remain on when once energized by making the distance between contacts 43, 45 less than the length of ring 40.
  • housing 65 containing lights 53, 54, and 55 is mounted directly on sensing mechanism housing 25 and both may be removed as a unit from filter housing 11 by unthreading housing 25 from projection 22 for replacing filter element 61.
  • indication housing 65 may be removed from the filter assembly by disengaging it at its press fit connection to housing 25 and mounting it at some remote location via flange 76.
  • a filter device comprising a first housing member having an inlet and an outlet with a chamber therebetween and with an opening connected to the chamber, a hollow filter element in the chamber having its interior connected to the inlet and its exterior spaced from the chamber wall to provide a first annular chamber portion exterior of the element, said first chamber portion being connected to the outlet, a second housing removably attached to the first housing and extending across the opening to close the same, said second housing having a cylinder depending therefrom into the chamber and engaging the filter element to hold it in a fixed position relative to the housing, the inner end of the cylinder being connected to the filter interior and the outer end of the cylinder being connected to the first annular chamber portion, a piston in the cylinder and movable by differentials of fluid pressures in said inner and outer ends to selected positions within the cylinder, electrical contact means carried by the cylinder and engageable by an outer peripheral surface of the piston to establish electric circuits when the piston is at said selected positions, and indicating means actuated by said electric circuits to indicate the position of said piston relative to
  • a filter device comprising a first housing member havang an inlet and an outlet with a chamber therebetween and with an opening connected to the chamber, a hollow filter element in the chamber having its interior connected to the inlet and its exterior spaced from the chamber wall to provide a first annular chamber portion exterior of the element, said first chamber portion being connected to the outlet, a second housing removably attached to the first housing and extending across the opening to close the same, said second housing having a cup shaped cylinder depending therefrom into the chamber and engaging the filter element to hold it in a fixed position therein, the cylinder being radially spaced from the wall of said chamber to form a second annular chamber portion that is connected to the first annular chamber portion, the inner end of the cylinder being connected to the filter element interior, passage means through a side wall of the outer end of the cylinder connecting said outer end with the second annular chamber portion, a piston in the cylinder and urged by a spring toward an inner position against a stop in the cylinder, said piston being movable to other positions within
  • said passage means includes portions spaced apart a sufficient distance to prevent complete blocking thereof by the piston as the piston moves toward said outer position and thereby prevent fluid lock in said cylinder outer portion.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtration Of Liquid (AREA)
  • Fluid-Pressure Circuits (AREA)
US00276694A 1972-07-31 1972-07-31 Filter with condition indicator Expired - Lifetime US3794168A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US27669472A 1972-07-31 1972-07-31

Publications (1)

Publication Number Publication Date
US3794168A true US3794168A (en) 1974-02-26

Family

ID=23057709

Family Applications (1)

Application Number Title Priority Date Filing Date
US00276694A Expired - Lifetime US3794168A (en) 1972-07-31 1972-07-31 Filter with condition indicator

Country Status (5)

Country Link
US (1) US3794168A (enrdf_load_stackoverflow)
JP (1) JPS4958466A (enrdf_load_stackoverflow)
CA (1) CA996659A (enrdf_load_stackoverflow)
DE (1) DE2335276A1 (enrdf_load_stackoverflow)
GB (1) GB1413366A (enrdf_load_stackoverflow)

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928201A (en) * 1974-08-08 1975-12-23 Caterpillar Tractor Co Filter mounting and bypass valve assembly
US4053410A (en) * 1975-09-10 1977-10-11 Caterpillar Tractor Co. Filter assembly with modulating bypass valve
FR2497319A1 (fr) * 1980-12-09 1982-07-02 Cummins Engine Co Inc Soupape de derivation avec alarme
US4366837A (en) * 1980-12-09 1983-01-04 Cummins Engine Company, Inc. Early warning bypass valve assembly
US4721563A (en) * 1986-09-11 1988-01-26 Rosaen Borje O Fluid filtering device
US20040118755A1 (en) * 2002-12-23 2004-06-24 Macdonald I. Scott Fluid filtration system with fluid flow meter
EP1479426A1 (de) * 2003-05-21 2004-11-24 Levitronix LLC Filtervorrichtung, sowie ein Verfahren zur Beurteilung des Zustandes einer Filtervorrichtung
US20070209978A1 (en) * 2006-03-10 2007-09-13 Mitchell Alan J Enhanced filter indicatior for refrigerator
US20090230034A1 (en) * 2008-03-14 2009-09-17 Darnell Justin R Filter cartridge
US20150144549A1 (en) * 2013-11-26 2015-05-28 Hydac Filtertechnik Gmbh Filter device
CN105540891A (zh) * 2015-12-11 2016-05-04 浙江沁园水处理科技有限公司 一种净水装置及其滤芯寿命实时监测器
US20180087419A1 (en) * 2016-09-23 2018-03-29 Bell Helicopter Textron Inc. Oil filter with impending and full-bypass indicators
US9976456B2 (en) 2013-01-24 2018-05-22 Cummins Filtration Ip, Inc. Virtual filter condition sensor
US10188969B2 (en) * 2015-03-19 2019-01-29 Hydac Filtertechnik Gmbh Filter device

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1181657B (it) * 1985-05-06 1987-09-30 Ital Idee Srl Filtro per olio lubrificante per motori a combustione interna,in particolare di autoveicoli,con organi di controllo del grado di intasamento della superficie filtrante
IT207038Z2 (it) * 1986-02-14 1987-11-02 G N G Di Gisonno E Graziano S Dispositivo rilevatore differenziale di intasamento per un filtro per fluidi idraulici
GB2309174A (en) * 1996-01-22 1997-07-23 Richard Henry Howard Barr Oil reclamation device
WO1997026979A1 (en) * 1996-01-22 1997-07-31 Centrax Limited Oil reclamation device
US5882507A (en) * 1996-04-30 1999-03-16 Recovery Engineering, Inc. Water filter cartridge end-of-life mechanism
DE102015003604A1 (de) * 2015-03-19 2016-09-22 Hydac Filtertechnik Gmbh Filtervorrichtung
EP3958996B1 (de) * 2019-07-25 2024-03-13 RT-Filtertechnik GmbH Filtervorrichtung
DE102019005324A1 (de) * 2019-07-25 2021-01-28 Rt-Filtertechnik Gmbh Filtervorrichtung
CN110585784B (zh) * 2019-09-18 2021-06-11 河南城建学院 一种水质监测用滤网
DE102021102116A1 (de) 2020-01-29 2021-07-29 Ifm Electronic Gmbh Vorrichtung zur Filterüberwachung einer Filterstation

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE142723C (enrdf_load_stackoverflow) * 1901-05-05 1903-07-27
US3046369A (en) * 1959-04-27 1962-07-24 Beatrice A Hicks Device for sensing gas density
DE1155187B (de) * 1959-02-25 1963-10-03 Bauer Eugen Gmbh Kurzzeitschalter zum Schalten eines Stromkreises fuer eine begrenzte Zeitdauer
US3323649A (en) * 1966-02-14 1967-06-06 Rosaen Filter Co Filter device and electrical indicating means
US3545616A (en) * 1969-09-05 1970-12-08 Sperry Rand Corp Filter and indicator means
US3644915A (en) * 1969-08-27 1972-02-22 Allis Chalmers Mfg Co Filter bypass indicator

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE142723C (enrdf_load_stackoverflow) * 1901-05-05 1903-07-27
DE1155187B (de) * 1959-02-25 1963-10-03 Bauer Eugen Gmbh Kurzzeitschalter zum Schalten eines Stromkreises fuer eine begrenzte Zeitdauer
US3046369A (en) * 1959-04-27 1962-07-24 Beatrice A Hicks Device for sensing gas density
US3323649A (en) * 1966-02-14 1967-06-06 Rosaen Filter Co Filter device and electrical indicating means
US3644915A (en) * 1969-08-27 1972-02-22 Allis Chalmers Mfg Co Filter bypass indicator
US3545616A (en) * 1969-09-05 1970-12-08 Sperry Rand Corp Filter and indicator means

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3928201A (en) * 1974-08-08 1975-12-23 Caterpillar Tractor Co Filter mounting and bypass valve assembly
US4053410A (en) * 1975-09-10 1977-10-11 Caterpillar Tractor Co. Filter assembly with modulating bypass valve
FR2497319A1 (fr) * 1980-12-09 1982-07-02 Cummins Engine Co Inc Soupape de derivation avec alarme
US4366837A (en) * 1980-12-09 1983-01-04 Cummins Engine Company, Inc. Early warning bypass valve assembly
US4423751A (en) 1980-12-09 1984-01-03 Cummins Engine Company, Inc. Bypass valve and alarm assembly
US4721563A (en) * 1986-09-11 1988-01-26 Rosaen Borje O Fluid filtering device
US20040118755A1 (en) * 2002-12-23 2004-06-24 Macdonald I. Scott Fluid filtration system with fluid flow meter
US6860988B2 (en) 2002-12-23 2005-03-01 Envirogard Products Ltd. Fluid filtration system with fluid flow meter
EP1479426A1 (de) * 2003-05-21 2004-11-24 Levitronix LLC Filtervorrichtung, sowie ein Verfahren zur Beurteilung des Zustandes einer Filtervorrichtung
US20070209978A1 (en) * 2006-03-10 2007-09-13 Mitchell Alan J Enhanced filter indicatior for refrigerator
US8337693B2 (en) 2006-03-10 2012-12-25 Whirlpool Corporation Enhanced filter indicatior for refrigerator
US20090230034A1 (en) * 2008-03-14 2009-09-17 Darnell Justin R Filter cartridge
US10287935B2 (en) 2013-01-24 2019-05-14 Cummins Filtration Ip, Inc. Virtual filter condition sensor
US9976456B2 (en) 2013-01-24 2018-05-22 Cummins Filtration Ip, Inc. Virtual filter condition sensor
US10634022B2 (en) 2013-01-24 2020-04-28 Cummins Filtration Ip, Inc. Virtual filter condition sensor
US9533244B2 (en) * 2013-11-26 2017-01-03 Hydac Filtertechnik Gmbh Filter device
US20150144549A1 (en) * 2013-11-26 2015-05-28 Hydac Filtertechnik Gmbh Filter device
US10188969B2 (en) * 2015-03-19 2019-01-29 Hydac Filtertechnik Gmbh Filter device
CN105540891A (zh) * 2015-12-11 2016-05-04 浙江沁园水处理科技有限公司 一种净水装置及其滤芯寿命实时监测器
CN105540891B (zh) * 2015-12-11 2019-06-28 浙江沁园水处理科技有限公司 一种净水装置及其滤芯寿命实时监测器
US20180087419A1 (en) * 2016-09-23 2018-03-29 Bell Helicopter Textron Inc. Oil filter with impending and full-bypass indicators
US10941683B2 (en) * 2016-09-23 2021-03-09 Bell Helicopter Textron Inc. Oil filter with impending and full-bypass indicators
US20210254518A1 (en) * 2016-09-23 2021-08-19 Bell Textron Inc. Oil Filter with Impending and Full-Bypass Indicators
US11680500B2 (en) * 2016-09-23 2023-06-20 Textron Innovations Inc. Oil filter with impending and full-bypass indicators

Also Published As

Publication number Publication date
CA996659A (en) 1976-09-07
DE2335276A1 (de) 1974-02-14
JPS4958466A (enrdf_load_stackoverflow) 1974-06-06
GB1413366A (en) 1975-11-12

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Legal Events

Date Code Title Description
AS Assignment

Owner name: PARKER INTANGIBLES INC., A CORP. OF DE, DELAWARE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:PARKER-HANNIFIN CORPORATION;REEL/FRAME:005886/0169

Effective date: 19881221