Source: http://www.google.com/patents/US7435347?dq=5527183
Timestamp: 2014-10-01 17:14:38
Document Index: 135734737

Matched Legal Cases: ['art 10', 'art 20', 'art 10', 'art 10', 'arts 10', 'arts 10', 'arts 30', 'art 28', 'arts 30', 'art 28', 'art 28', 'art 28', 'arts 30']

Patent US7435347 - Filter device and parts thereof and a method for operating of the filter device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA filter device has a filter housing part (10) with a filter element (12) and can be detachably connected to another filter housing part (20). A valve (24) clears a fluid path in the interconnected state of the housing parts (10, 20) with the filter element, and in the separated state of the housing...http://www.google.com/patents/US7435347?utm_source=gb-gplus-sharePatent US7435347 - Filter device and parts thereof and a method for operating of the filter deviceAdvanced Patent SearchPublication numberUS7435347 B2Publication typeGrantApplication numberUS 11/516,060Publication dateOct 14, 2008Filing dateSep 6, 2006Priority dateAug 25, 2006Fee statusPaidAlso published asDE102006039826A1, DE102006039826B4, US20080047890Publication number11516060, 516060, US 7435347 B2, US 7435347B2, US-B2-7435347, US7435347 B2, US7435347B2InventorsVolkmar KleinOriginal AssigneeHydac Filtertechnik Gmbh.Export CitationBiBTeX, EndNote, RefManPatent Citations (13), Referenced by (3), Classifications (13), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetFilter device and parts thereof and a method for operating of the filter deviceUS 7435347 B2Abstract A filter device has a filter housing part (10) with a filter element (12) and can be detachably connected to another filter housing part (20). A valve (24) clears a fluid path in the interconnected state of the housing parts (10, 20) with the filter element, and in the separated state of the housing parts (10, 20) from one another or without the filter element at least partially blocks it. Instead of known quarter-turn fastener and stopper solutions, a blocking is devised which can be economically implemented and which requires decidedly less installation space. A process for operation of a filter device is also provided.
FIELD OF THE INVENTION The present invention relates to a filter device having a filter housing part comprising a filter element and detachably connected to another filter housing part. The present invention furthermore relates to certain parts of the filter device and a method for its operation.
BACKGROUND OF THE INVENTION The prior filter devices include, among others, so-called spin-on filters. In their filter housing parts, a filter element designed especially for the respective filtration task is integrated. If the filter element is clogged with dirt causing the filter device to become unusable for its filtration task, the entire filter device, that is, the filter housing in addition to the filter element, must be replaced by a new filter device. This replacement has the disadvantage that the entire unit must be disposed of, although the actual filter housing part would still be usable. To remedy this situation, conventionally in the spin-on filter only the used filter element need be replaced such that the filter housing part with a new filter element can be used as a newly assembled filter device, especially for removing dirt from hydraulic circuits. Fundamentally, the problem arises that operators or even specially trained maintenance personnel forget to use a new filter element. Then, the reconnected filter housing part designed as a screw-in cartridge, even without the filter element, enables operation of the hydraulic system, but without dirt in the fluid flow being removed. Serious damage to the entire hydraulic system can then occur. Comparable problems also arise for other fluid media such as gases or pasty media.
SUMMARY OF THE INVENTION An object of the present invention is to provide an improved filter device having low production costs, reduced installation space, and a blocking solution which ensures that the filter device can only be operated together with its associated filter element, even when the filter element is replaced by a new, unused element.
If the fluid flow through the filter device is completely stopped by the valve, the hydraulic control unit evaluates this as a problem, resulting in an error report being delivered from which the operating or maintenance personal can then detect the absence of the filter element or by choking the fluid volumetric flow the respective hydraulic function is maintained. However, the differential pressure on the filter device increases such that a correspondingly mounted fouling display responds when the element is absent and delivers the message �Fouled filter element to be replaced�. The message is intended to cause the filter device to be checked with respect to its serviceability such that the possible absence of the filter element can be established without failure of the hydraulic components of the system occurring. Operators experienced in the handling of hydraulic machinery will moreover be able to recognize even without the display that the filter element is missing when the corresponding noise or slackening of machine performance occurs due to this choking of the volumetric flow.
DETAILED DESCRIPTION OF THE INVENTION The filter device shown in FIG. 1 has a cup-shaped filter housing part 10 surrounding the filter element 12, as is shown, for example, in FIG. 2. Flow takes place through the filter element 12 from the outside to the inside, as viewed in FIG. 1. The filter element has a conventional filter element structure which is not detailed, for example, comprising a pleated, multilayer filter mat supported against a fluid-permeable support pipe. Fouled fluid is optionally supplied from a hydraulic circuit (not detailed) via the fluid supply 14 to the filter device. Cleaned, filtered fluid travels via a center channel 16 of the filter element 12 to the fluid discharge 18 of the filter device. To be able to backflush the filter element 12, it would also be conceivable to operate the filter device in the reverse fluid direction. Likewise, it would be possible in a specially designed filter element 12 to reverse the direction of fluid throughflow so that then the fluid to be cleaned flows through the filter element 12 from the inside to the outside. In these instances, generally to support the pleated filter material, a support pipe or other support element such as a grating must be attached on the outer peripheral side of the filter element. This structure of a filter device is conventional will not be detailed. Conventionally, another filter housing part 20 forming a filter head and having a supply 14 and a discharge 18 extends over the filter housing part 10 on its upper free end on the front and to be detachably connected to the filter housing part 10 via a screw-on or threaded section 22.
The filter device furthermore has a valve 24, as shown in FIG. 4. Other solutions or embodiments for the valve 24 are shown in FIGS. 5 to 7. If, as shown in FIG. 1, the two housing parts 10, 20 are connected to one another, the valve 24 is moved into the open position to clear the fluid-carrying path. In the separated state of the housing parts 10, 20 from one another, the fluid-carrying path between the center channel 16 and the fluid discharge 18 is blocked. In the absence of a control part and designed as a complete closure (valve function), the valve remains closed until the pressure p1 has reached or exceeded the opening pressure p0 of the valve, i.e., p1<p0:p2=0 for an unpressurized connection to the tank, volumetric flow Q=0, p1>=p0:p2=p1�Δpvalve, ideally for Δpvalve=0:p2=p1.
The top of the center plug 48 is connected to the raising plug 34. The three inserted control parts 30 extend between an annular flange 52, on the top end of the center plug 48, and a contact-making and pushing pin 54 on the free end of the trigger part 28. These bridge-like trigger parts 30 can be further stiffened by at least one middle ring 56. The fluid passages 58, bordered by the stiffening bridges 46, the top of the contact-making plate 36 and the bottom of the encompassing edge 38 are used for incident flow onto the actual filter element with its filter medium in the seated state. The fluid passages 58 more or less form the inflow channel between the filter element and the optional �dirt catcher� used to catch dirt in the direction of flow through from the outside to the inside. The insertion bevels 60 point down on the stiffening bridges 46 to facilitate insertion of the trigger part 28 into the (optional) dirt catcher along its upper edge. This trigger part 28 preferably is formed of a plastic material which can be economically produced, for example, by an injection molding process. For permanent connection of the trigger part 28 made in one piece to the filter material of the filter element 12 a cement connection (not detailed) can be used. Instead of three control parts 30, a different number of control parts (not shown) can also be used.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3307819 *Apr 12, 1965Mar 7, 1967Cocito Joe MichaelDisc valve for vacuum boardUS3319791 *Mar 2, 1964May 16, 1967Horne Fred HPoppet valve and disposable container combinationUS3385475 *Oct 22, 1965May 28, 1968Loe IndContainer puncturing assembly associated with a pump and check-valve meansUS3485368 *Nov 3, 1967Dec 23, 1969Caterpillar Tractor CoHydraulic circuit with filter controlUS3703913 *Aug 2, 1971Nov 28, 1972Cvc CoAutomatic rate of flow control valveUS3715032 *Nov 3, 1971Feb 6, 1973S NickoFluid treatment devicesUS3868991 *Sep 14, 1972Mar 4, 1975Avm CorpValve assemblyUS3957083 *Jan 27, 1975May 18, 1976The United States Of America As Represented By The Secretary Of The Air ForcePressure sensitive regulating valveUS4077876 *Oct 21, 1976Mar 7, 1978Amf IncorporatedShut-off valve apparatusUS5643446 *Nov 10, 1993Jul 1, 1997Parker Hannifin CorporationFuel filter and priming pumpUS5695168 *May 31, 1995Dec 9, 1997Williams; Richard T.Automatic valving unit, and pressure vessel having automatic valvingUS5914037 *Nov 24, 1997Jun 22, 1999Yen; Chiu-SenFilter device for a water filterUS6269837 *Nov 9, 1998Aug 7, 2001The Procter & Gamble CompanyRechargeable dispensing system* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS8671980Aug 6, 2010Mar 18, 2014General Ecology, Inc.Apparatus for filtering and/or conditioning and/or purifying a fluid such as waterEP2601141A1 *Aug 6, 2010Jun 12, 2013General Ecology, Inc.Apparatus for filtering and/or conditioning and/or purifying a fluid such as waterWO2012018321A1 *Aug 6, 2010Feb 9, 2012General Ecology, Inc.Apparatus for filtering and/or conditioning and/or purifying a fluid such as water* Cited by examinerClassifications U.S. Classification210/234, 210/739, 210/100, 251/902, 210/235, 210/90, 137/512.15, 210/741International ClassificationB01D35/153Cooperative ClassificationY10S251/902, B01D2201/16, B01D35/143European ClassificationB01D35/143Legal EventsDateCodeEventDescriptionMar 19, 2012FPAYFee paymentYear of fee payment: 4Oct 5, 2006ASAssignmentOwner name: HYDAC FILTERTECHNIK GMBH, GERMANYFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KLEIN, VOLKMAR;REEL/FRAME:018382/0874Effective date: 20060927RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google