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Publication numberUS2492704 A
Publication typeGrant
Publication dateDec 27, 1949
Filing dateSep 4, 1944
Priority dateSep 4, 1944
Publication numberUS 2492704 A, US 2492704A, US-A-2492704, US2492704 A, US2492704A
InventorsLawrence R Lentz
Original AssigneeLawrence R Lentz
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
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US 2492704 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

Dec. 27, 1949 L. R. LENTZ FILTER Filed Sept. 4, 1944 atented ec. 27,! 94

' lL'rER Irawrenceil. LentadM-llersport, Ohio Appucafih "sitnt 4, 1921,51; serial, 16.15.52.300

My invention relates to' a new and useful irnprovernent'in a gasoline iter adapted for' use iii'filt'ering gasolineprior to'zits consumption. In the' inventionflutilz a phllality of lters and have? provided a mechanism whereby either filter maybe usedY selectively. 'e

'is anobject' of thepresent invention toV provide a ilter of'this class'which will be simplev in structure, economical" of manufacture, durable, compact andhi'ghl'y'ecient in use.

4A`Anotheroloj'ect 'o if the'invention is the provision of alterso 'arranged and constructed that while one'of thai-liter elements is being used,`the other may' be Washed and'rcl'eanedby a portion or the filtered gasoline.

Another object of' the invention is the provision oij an auxiliary delivery passage closed by a'va'lye which will open under excessive pressure so that should the filter become plugged-and prevent the fl'oW of' 'gasoline' to the 'object ofconsumption, the spring closed valve will open thus permitting unltered gasoline' to ow to 'tne engine o r the like so as Vto preventits stalling.

"Another object'of theinventi'on is'the provision ola" ilterl- 'element lhaving a'rigid A-top portion against which may bear a/springfor retaining the filter member distended.` e j Ytl'rerobjects'will appear hereinafter.

caticns" may be made'in'the"detaiiofstructure 3 illustrated Without departing from' `the v invention itself' and it is intendedthat such variations'and modifications, may "be encompassed-"Withintne scope of the-claims forming a part l'iereoiA fForming al vpart of this specification' arev drawings in Whichr*- y Fig. 1 is a front elevational vieW- of the invenf Fig. 2 is a longitudinal, vertical', trai-view-of'the'inventio -;V

Fig. V is a sectional view-'taken on 1ine-3-"3' 'of .l

...i 1,-, r .1 Fig. 4 is a top plan View of the invention; `Fig.{5 is a sectional-view takenon line. .5a-5 Fig: 4;* 1"

sectionahjcen- 6 is a sectional View" takenron line-6.4 ofs- Figgzj .l ...i` I..

Inrthe drawings, I have villustrated theirwen-iv tion embodyingfra base 9. formeeL-inwhichfis an outlet passage lucommunieating .witnw-hieh is a. 4450ml Sti- Proiectina suitableVY deliveryv conduit it I.. Wardly fromthis base!!4 -is a. bossplZ .leaving.anf` opening Iii-formed therein into whehismennented an'inlet delivery pine 1.4.. 'I nis:.onening.,l,-3=;com

municates, 4with the Vpassage ti .interpqsedfinnsaj I Stand-Si (Cl. zio-"163).v s: f

is a passage.. A passage ZI leads. .intatte Welll orelianiber Wire ...the passagei5-...T116 valvepiug la sont away. amtsonoo "besides-as att@ 'and 2.3 Protecting. Qutwa'rdl. remt Valve plus iisallgfz. The bess .fissatamii te provide the-Shogi ers and-25 so.. tritfwlael the valve plug i6 isl'rocked 'to one. sideftaeswab-Q. lSh v-C01.dllir1-c.ation between the [nassages i5 and Mathe., ,liia-12AJ-wllv. engage' the. Sheuler 26 and Wasn the ralrefplug, isjrockedulti'l. ,the lug. 24, engages tnesliouldeil., thlepfsseeesl i5 Z1. will be. incenununication each other. Pos1tionen ox/,ereach-ortne. .wells is land t9. is4 a similar cgnstruction. .anda 'description offene will. Sulieefr both J j inverted .cupvshaned housing 2.,'1fA threaded intotne based), seas; to cover the. well or: chamber i8. f.Projeating.y upwardly. from. the. base. dem

trailer of thewelior chamber Itis ythe ttringler b ossz.; which is internalrlrithreaded to receive oney end ci themtuloe .294... VThis tube projectsnpf. warmyintq.meinten@ of mepe11dwsuike` intel; at, its upper end Witha rigid disk l. ,raeamstwhwh .hears Queen@ ci tussenbe- 3Z thesonpositecfend '.oiihe ,Spring- 3 2: bear ing f against. .a .imilan dsli. Exam Fiel 5... it. wil1.be.notedthat gasoline ydeliwere ...tothe 'I Jase` Sage l-.i ser, :ttedtetlew ictQthechamber It and 11:1? zal .1X mtg: bhe-h wemelt .This lltelr memben ia'suitablelt e or the; like., and the elementi easelme flew .mieten the. alter, 1;

011g the-mbe 29. inteihe o Here@ gasoline. wil

Wale letales the sa Wirf-mme titer Del.. Qflecfms; lili-tm leeeefaer tenant.ailier-V reason it is desired to use the; insite filter meine beate@ relive-,ring .i6 anni@ .te tetateii tcsneieit Qsitiqnshewa Eig... entament ninety...eesessatlmslesineeeo .Y I tween the passages 20 and I5 and opening @me munication between the passages; 2l and.: l5?, thais permitirme; thesaseline .te non. into the .cnamber lia... whiehiconstitutesan `extensiex-i .ci the pase Sagejms Shewninjfig, when thepassages. are in, cnmrnunieaticn so .th aft-the/ gasos maillon v line is flowing into the chamber I8 for illtering purposes, the passage |a and the passage 2l are in communication. The filtered gasoline which passes downwardly of the tube 29, in the structure shown in Fig. 5, will pass into the outlet passage l. An examination of Fig. 5 and Fig. 2 will indicate that this passage I0 is always in communication with the tubes within the filter members. Consequently, as the operator is using the lter A for ltering purposes, the filtered gasoline will also flow upwardly in the tube of the filter B and thence outwardly through the iilter element into the well or chamber i9 and downwardly to the passage |5a. The operator may then, when switching from one lter element to the other, by opening the drain cock 34, which is operated by the handle 35, drain out from the lter which is in use the gasoline which has flowed into the interior of the lter and through it. Thus the lter member which is not in use is washed by ltered gasoline which enters into the interior thereof and flows therethrough. This method of operation has proven quite conclusively that the washing operation is one which will remove all foreign material from a dirty lter and restore it to proper condition for use. It is thus seen that I have provided a lter construction in which a plurality of lter members are used and which are so interrelated that while one is being used, the other may be shut oir and means is provided for cleaning the filter member which is not being used.

In the use of this gasoline filter arrangement, the operator may, when the filter becomes dirty so that the proper flow of gasoline therethrough is no longer permitted, fail to switch over to the clean filter, with the result that the proper amount of gasoline for engine operation is not being delivered. In the present invention, I have provided a means of taking care of such carelessness or indifference. Communicating with the opening I3 is a passage 36. Formed in the boss l2 is the vertically extending, elongated passage 31 having a valve seat 38 at its upper end. Engaging this valve seat is a spring pressed valve 39 normally held in closed position by the spring 40. The construction is such that when the ow of gasoline through the filter member is retarded anda pressure is built up in the filter I4 beyond normal, the valve 39 will be forced off its seat, thus permitting the gasoline to flow downwardly of the passage 31 into the outlet delivery passage Il). This permits the unltered gasoline to flow to the engine but is only for emergency purposes in order to prevent stalling of the engine. Attached to and movable in unison with the valve 39 is the stem 4l which, upon movement of theV mentioned inlet delivery passage, said base havvalve 39 to open position, will engage the electric contact l2 and close a circuit to the alarm bell or other signaling device 43 so that the operator is warned that unfiltered gasoline is being passed to the engine and his attention called to the fact that the valve plug I 6 should be rotated to use the other filter member.

With a filter constructed in this manner, a compact arrangement is provided, one which is durable and which has proven most eiicient in operation.

What I claim as new is:

1. In a filter of the class described a base hav-V ing a pair of wellsl formed in its upper face eachl ing a pair of lateral passages formed therein each communicating with one of said wells and with said inlet delivery passage at the location of said valve, said valve being movable to positions for controlling the communication of said lateral p-assages with said inlet delivery passage.

2. In a lter of the class described a base having a pair of wells formed in its upper face, each of said wells being spaced from the other; a boss projecting upwardly from said base between said wells and having an elongated longitudinally directed inlet delivery passage formed therein; a

delivery pipe communicating with said delivery passage and there being formed in said base an outlet delivery passage, and said boss having anA auxiliary inlet delivery passage formed therein extending parallel to the said iirst mentioned inlet delivery passage and communicating with said outlet delivery passage; and a spring pressed valve positioned in said auxiliary inlet delivery passage and normally spring pressed to closed position and movable to open position upon the development of a pressure in said auxiliary inlet delivery passage at one side of said valve; and a valve positioned in the lower end of said first mentioned inlet delivery passage, said base having a pair of lateral passages formed therein, each Vcommunicating with one oi said wells and with said inlet delivery passage at the location of said valve, said valve being movable to positions for controlling the communication of said lateral passages with said inlet delivery passage, said base having an outlet delivery passage formed therethrough, one end of said auxiliary inlet delivery passage being in communication with said outlet delivery passage; a closed housing mounted on Ysaid base over each of said wells for forming therewith a chamber; a hollow filter f member positioned in each of said housings and L non-communicating therewith; and means for l establishing communication of theinterior of the ilterV member with said outlet passage for conducting liquid terminating through said lter Y member into the interior therefrom.

inga pair of weils formed in its upper face, each l,oi said wells being spaced from the other; a boss projecting upwardiyjirom said basebetween said wells and having an elongated longitudinally directed inlet delivery passage formed therein; a delivery pipe communicating with said delivery passage and there being formed in said base an Y outlet delivery passage, and said boss having an auxiliary inlet delivery passage formed therein extending parallel to the said rst'mentioned inlet delivery passage and communicating with said outlet delivery passage; and a spring pressed valve positioned in said auxiliary inlet delivery passage and normally spring pressed to closed position and movable'to open position upon the development of a pressure in said auxiliary inlet delivery passage at one sidev of said valve; and a valve positioned in the lower end of said first mentioned inlet delivery passage, said base having a pair of lateral passages formed therein, each communicating with one of said wells and with said inlet delivery passage at the location of said valve, said valve being movable to positions for controlling the communication of said lateral passages with` said inlet delivery passage, said base having an outlet delivery passage formed therethrough, one end of said auxiliary inlet delivery passage being in communication with said outlet delivery passage; a closed housing mounted on said base over each of said wells for forming therewith a chamber; a hollow lter member positioned in each of said housing-s and non-communicating therewith; and means for establishing communication of the interior of the lter member with said outlet passage for conducting liquid terminating through said filter member into the interiol` therefrom, said filter member being positioned above the point of communication of said lateral passages with the well.

LAWRENCE R. LENTZ.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US1708517 *May 19, 1922Apr 9, 1929 William w
US1784103 *Nov 27, 1925Dec 9, 1930American Bemberg CorpExchangeable filter, more particularly for artificial-silk-spinning machines
US1861805 *Feb 1, 1930Jun 7, 1932Lawrence R LentzFilter
US2095447 *Aug 22, 1935Oct 12, 1937Lawrence R LentzFilter
US2134385 *Oct 7, 1935Oct 25, 1938Charles A WinslowFilter mechanism
US2239868 *Oct 27, 1938Apr 29, 1941Motor Improvements IncFilter
US2253684 *Mar 18, 1937Aug 26, 1941Michiana Products CorpFilter
US2333609 *Dec 21, 1942Nov 2, 1943Ralph L SkinnerCleanable multiple filter
US2348651 *Jun 28, 1941May 9, 1944Business Collaborators IncFilter
US2359938 *Jan 16, 1943Oct 10, 1944Quiroz Francisco AngelFluid strainer
US2365776 *Sep 15, 1943Dec 26, 1944Searle & CoIodo-sugar derivatives and method of preparing same
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2679320 *Dec 1, 1951May 25, 1954Air Maze CorpDual filter with pressure differential selector valve
US3914176 *May 6, 1974Oct 21, 1975Clark Equipment CoDual filter assembly
US6991725 *Oct 25, 2002Jan 31, 2006Frerichs Stephen ASwitchable diesel fuel filter assembly
US7992667 *Aug 3, 2007Aug 9, 2011David Wayne RennieOil cooling and filtering system, kit and apparatus
Classifications
U.S. Classification210/333.1, 210/130, 210/340, 210/438
International ClassificationB01D35/12
Cooperative ClassificationB01D35/12
European ClassificationB01D35/12