GB2307422A - Screw cap with centring means for a filter insert - Google Patents

Screw cap with centring means for a filter insert Download PDF

Info

Publication number
GB2307422A
GB2307422A GB9623420A GB9623420A GB2307422A GB 2307422 A GB2307422 A GB 2307422A GB 9623420 A GB9623420 A GB 9623420A GB 9623420 A GB9623420 A GB 9623420A GB 2307422 A GB2307422 A GB 2307422A
Authority
GB
United Kingdom
Prior art keywords
screw cap
filter insert
cap
annular
pipe socket
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.)
Withdrawn
Application number
GB9623420A
Other versions
GB9623420D0 (en
Inventor
Thomas Brieden
Hans Jensen
Dietmar Sonntag
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.)
Knecht Filterwerk GmbH
Original Assignee
Knecht Filterwerk GmbH
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 Knecht Filterwerk GmbH filed Critical Knecht Filterwerk GmbH
Publication of GB9623420D0 publication Critical patent/GB9623420D0/en
Publication of GB2307422A publication Critical patent/GB2307422A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B01D35/30—Filter housing constructions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/114—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/96—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor in which the filtering elements are moved between filtering operations; Particular measures for removing or replacing the filtering elements; Transport systems for filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/24—Tools used for the removal of filters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/30—Filter housing constructions
    • B01D2201/301—Details of removable closures, lids, caps, filter heads
    • B01D2201/305—Snap, latch or clip connecting means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/40—Special measures for connecting different parts of the filter
    • B01D2201/4084—Snap or Seeger ring connecting means

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
  • Filtration Of Liquid (AREA)

Abstract

A screw cap 2 for a filter housing 1 includes a centring means 7 and a snap connection 8, 10 for rotatably and radially non-elastically mounting an annular filter insert 9 contained in the housing. The centring means 7 is preferably a round bolt moulded in the cap interior and it is received in a recess in a holding closure member 8 which slide fits in the filter insert 9. The outer periphery of the closure member 8 snaps into holding clips 10 of deformable material, which are carried by the screw cap. The cap may include a pipe socket 4 with a hexagonal profile for receipt of a tool, a stopper 6 being inserted in the socket so as to reinforce the socket.

Description

Tltle: SCREW CAP FOR A FILTER HOUSING This invention relates to a plastic screw cap for a filter housing.
Such screw caps are known, for example, from DE 43 44 588 Al and from EP 0612549. In the latter case, the inner contour of the screw cap is shaped outwardly with a bulge in the region of the pipe socket in a first design. The transition from the pipe socket into the base of the bell of the screw cap therefore has to have a relatively thick wall so the forces of an applied fitting tool can be absorbed and the resultant deviation of the base of the bell from its ideal shape is at least partially compensated by pressure chambers. However, accumulations of material in plastic parts are undesirable for various reasons. Among other things, they adversely affect the ideal distribution of tension and therefore decisively reduce the resistance of the plastic screw cap to pulsation.
A second design according to that document affords advantages with respect to the internal contour of the screw cap. However, the integrally moulded pipe socket, on whose external surface designed as a polygon, a fitting tool acts has to be dimensionally stable in order to be able to absorb the radially acting forces occurring during release by means of the tool. Undesirable accumulations of material in the transitional region to the base of the bell with the above-mentioned drawbacks are therefore unavoidable.
The present invention is based on the idea of not adversely affecting, in terms of strength, a specific form of the screw cap base required for strength in the deformability by, in particular, an attachment existing in the form of a thickwalled pipe socket for a fitting tool.
The present invention thus aims to deal with the problem of reinforcing the radially resilient mounting of the filter insert on the screw cap.
A further aim of the invention is to provide a screw cap for a filter housing which enables replacement of an exchangeable annular filter element to be achieved as simply and inexpensively as possible.
Accordingly, the present invention provides a plastics screw cap for a filter housing in which an annular filter insert in the interior of the cap is separable therefrom and can be rotatably mounted round the screw axis thereof, wherein the rotatability is provided by a snap closure in which one connecting member has an annular web and the other connecting member has radially resilient holding clips which axially fix this annular web and wherein centring means for radially nonelastic mounting of the annular filter insert relative to the screw cap are provided between the screw cap and the annular filter insert.
Preferably, the centring means consist of a round bolt moulded on the interior of the base of the screw cap which may be engageable in a recess in the adjoining end face of the filter insert or in a recess in a holding member which is adapted to be connected to the filter insert with a sliding fit.
The holding member is desirably designed as a closure cap for the radial interior of an annular filter insert.
According to a preferred embodiment of the invention, an attachment extends axially from the exterior of the screw cap and serves for the radial support of a stopper which is adapted to be introduced into a pipe socket coaxially surrounding the attachment with radial spacing, and to serve as a means for reinforcing said pipe socket.
The invention will now be described in detail, by way of example, with reference to the drawings1 in which: Fig. 1 is a longitudinal section through a detail of a filter housing with one embodiment of a cap according to the invention screwed on; Fig. 2 is a vertical section through the cap shown in Fig. 1 but with inserted parts omitted; and Fig. 3 is a plan view of the cap shown in Fig. 2.
Referring to the drawings, Fig. 1 shows a screw cap 2 according to the invention screwed onto a filter housing 1. An attachment piece 3 for the insertion of a tool is provided at the end of the screw cap to permit the screw cap to be fitted to and removed from the filter housing. The attachment piece 3 consists of a pipe socket 4 with a hexagonal external profile shaped on the base of the screw cap 2. An attachment 5 is shaped directly in the centre of the screw cap 2 axially outwardly on its base. A stopper 6 is inserted radially internally and externally positively into the interior of the pipe socket 4. This stopper 6 is mushroom-shaped, the mushroom head resting on the pipe socket 4 in the inserted state of the stopper so as to form a positive radial seal from the exterior.The stopper 6 is inserted into the pipe socket 4 in such a way that no distortion of material occurs in the pipe socket 4. On the other hand, the fit is such that the stopper 6 is held permanently in the pipe socket 4. A catch connection, for example, can be selected of which one catch element 11 is shown in the interior of the pipe socket 4 in Fig. 2. The stopper 6 is preferably made of plastics material as is the screw cap 2.
A round bolt 7 which is used for the holding and radially non-elastic mounting of a closure cap 8 on the end face of an annular filter insert 9 is moulded centrally in the interior of the screw cap 2. The closure cap 8 is mounted rotatably on the round bolt 7 substantially without play. The closure cap 8 is axially fixed via holding clips 10 of radially deformable material which are formed on the screw cap 2 and adapted to be snapped onto a peripheral annular web on the outer periphery of the closure cap 8. The closure cap 8 is rotatable relative to the screw cap 2 within this snap connection. The annular filter insert 9 can be fitted onto a cylindrical region of the closure cap 8 with a radial seal.
Forces of a fitting tool are distributed over a relatively large region by the stopper 6 within the pipe socket 4 so the wall thickness of the pipe socket 4 can be extremely small overall and in particular in the transitional region to the base of the screw cap.

Claims (5)

1. A plastics screw cap for a filter housing in which an annular filter insert in the interior of the cap is separable therefrom and can be rotatably mounted round the screw axis thereof, wherein the rotatability is provided by a snap closure in which one connecting member has an annular web and the other connecting member has radially resilient holding clips which axially fix this annular web and wherein centring means for radially non-elastic mounting of the annular filter insert relative to the screw cap are provided between the screw cap and the annular filter insert.
2. A screw cap according to claim 1, wherein the centring means consist of a round bolt moulded on the interior of the base of the screw cap which is engageable in a recess in the adjoining end face of the filter insert or in a recess in a holding member which is adapted to be connected to the filter insert with a sliding fit.
3. A screw cap according to claim 2, wherein the holding member is designed as a closure cap for the radial interior of an annular filter insert.
4. A screw cap according to any one of the preceding claims, wherein an attachment extends axially from the exterior of the screw cap and serves for the radial support of a stopper which is adapted to be introduced into a pipe socket coaxially surrounding the attachment with radial spacing, and to serve as a means for reinforcing said pipe socket.
5. A screw cap substantially as described herein with reference to the drawings.
GB9623420A 1995-11-27 1996-11-08 Screw cap with centring means for a filter insert Withdrawn GB2307422A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19544087 1995-11-27

Publications (2)

Publication Number Publication Date
GB9623420D0 GB9623420D0 (en) 1997-01-08
GB2307422A true GB2307422A (en) 1997-05-28

Family

ID=7778476

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9623420A Withdrawn GB2307422A (en) 1995-11-27 1996-11-08 Screw cap with centring means for a filter insert

Country Status (3)

Country Link
DE (1) DE19642641C2 (en)
FR (1) FR2741548A1 (en)
GB (1) GB2307422A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0860191A2 (en) * 1997-02-20 1998-08-26 Knecht Filterwerke Gmbh Plastic cover for filter casing
FR2789729A1 (en) * 1999-02-12 2000-08-18 Moulage Ind De Perseigne Mip Oil filter case for crankcase for car has tubular body and rod linking bottom and lid of body
FR2790513A1 (en) * 1999-03-02 2000-09-08 Filtrauto Filter casing for engine comprises retention flanges parallel to central axis and having fixed end and free end
WO2000062893A1 (en) * 1999-04-19 2000-10-26 Brueninghaus Hydromatik Gmbh Filtering device comprising a detachable filter housing
WO2002016004A1 (en) * 2000-08-23 2002-02-28 Caterpillar Inc. Fluid filter operatable only with installed filter element
US6391197B1 (en) 1997-12-15 2002-05-21 Domnick Hunter Limited Filter assembly
US6409786B1 (en) 1997-12-15 2002-06-25 Domnick Hunter Limited Filter assembly
US6416563B1 (en) 1997-12-15 2002-07-09 Domnick Hunter Limited Filter assembly
US6440201B1 (en) 1997-12-15 2002-08-27 Domnick Hunter Limited Filter assembly having end cap with separable flow conduit
GB2373457A (en) * 2001-03-19 2002-09-25 Dana Corp A filter with releasable housing portions
US6461397B1 (en) 1997-12-15 2002-10-08 Domnick Hunter Limited Filter assembly
EP1285683A1 (en) * 2001-08-22 2003-02-26 Fleetguard, Inc. Replaceable filter element and snap-on filter lid assembly
US6663685B2 (en) 1997-12-15 2003-12-16 Domnick Hunter Limited Filter assembly
WO2004011121A1 (en) * 2002-07-31 2004-02-05 Caterpillar Inc. Replaceable filter with locking mechanism
EP1494778A1 (en) * 2002-03-20 2005-01-12 Arvin Technologies, Inc. Apparatus and method for releasing a filter from a filter cap of a filter assembly
EP1936306A2 (en) * 2006-12-19 2008-06-25 Whirlpool Corporation Water filter removal and installation tool

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19737699A1 (en) * 1997-08-29 1999-03-04 Mann & Hummel Filter Filter module
DE19852587A1 (en) * 1998-08-11 2000-02-17 Mann & Hummel Filter Horizontal oil or fuel filter for vehicles has a drain that can be positioned in the lowest position
DE29915840U1 (en) * 1999-09-09 2001-01-25 Ing. Walter Hengst GmbH & Co KG, 48147 Münster Openwork valve body filter
AU2001241831A1 (en) 2000-02-29 2001-09-12 Bombardier Inc. Four stroke engine with valve train arrangement
DE102008040319A1 (en) * 2008-07-10 2010-01-14 Deere & Company, Moline Filter arrangement for filtering a liquid or gaseous medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2004472A (en) * 1977-09-22 1979-04-04 Zahnradfabrik Friedrichshafen Oil tank filter
DE4344588A1 (en) * 1993-12-24 1995-06-29 Knecht Filterwerke Gmbh Air bleed channel for fuel filter
US5516425A (en) * 1993-02-09 1996-05-14 Mahle Gmbh Oil filter for the cleaning of lubricating oil

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4231999A1 (en) * 1992-09-24 1994-03-31 Bosch Gmbh Robert Filters for cleaning fuel
DE4303694B4 (en) * 1993-02-09 2004-01-29 Mahle Filtersysteme Gmbh Liquid filter with overflow valve
US5458767A (en) * 1994-08-10 1995-10-17 Parker-Hannifin Corporation Fuel filter assembly with dual filter media and by-pass device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2004472A (en) * 1977-09-22 1979-04-04 Zahnradfabrik Friedrichshafen Oil tank filter
US5516425A (en) * 1993-02-09 1996-05-14 Mahle Gmbh Oil filter for the cleaning of lubricating oil
DE4344588A1 (en) * 1993-12-24 1995-06-29 Knecht Filterwerke Gmbh Air bleed channel for fuel filter

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0860191A3 (en) * 1997-02-20 1999-03-31 Knecht Filterwerke Gmbh Plastic cover for filter casing
EP0860191A2 (en) * 1997-02-20 1998-08-26 Knecht Filterwerke Gmbh Plastic cover for filter casing
US6663685B2 (en) 1997-12-15 2003-12-16 Domnick Hunter Limited Filter assembly
US6391197B1 (en) 1997-12-15 2002-05-21 Domnick Hunter Limited Filter assembly
US6409786B1 (en) 1997-12-15 2002-06-25 Domnick Hunter Limited Filter assembly
US6416563B1 (en) 1997-12-15 2002-07-09 Domnick Hunter Limited Filter assembly
US6440201B1 (en) 1997-12-15 2002-08-27 Domnick Hunter Limited Filter assembly having end cap with separable flow conduit
US6461397B1 (en) 1997-12-15 2002-10-08 Domnick Hunter Limited Filter assembly
FR2789729A1 (en) * 1999-02-12 2000-08-18 Moulage Ind De Perseigne Mip Oil filter case for crankcase for car has tubular body and rod linking bottom and lid of body
FR2790513A1 (en) * 1999-03-02 2000-09-08 Filtrauto Filter casing for engine comprises retention flanges parallel to central axis and having fixed end and free end
WO2000062893A1 (en) * 1999-04-19 2000-10-26 Brueninghaus Hydromatik Gmbh Filtering device comprising a detachable filter housing
US6770110B1 (en) 1999-04-19 2004-08-03 Brueninghaus Hydromatik Gmbh Filtering device comprising a detachable filter housing
WO2002016004A1 (en) * 2000-08-23 2002-02-28 Caterpillar Inc. Fluid filter operatable only with installed filter element
US6481580B1 (en) 2000-08-23 2002-11-19 Caterpillar Inc Fluid filter with locking mechanism
GB2373457A (en) * 2001-03-19 2002-09-25 Dana Corp A filter with releasable housing portions
EP1285683A1 (en) * 2001-08-22 2003-02-26 Fleetguard, Inc. Replaceable filter element and snap-on filter lid assembly
US6627078B1 (en) 2001-08-22 2003-09-30 Nelson Industries, Inc. Filter element cover grip
EP1494778A1 (en) * 2002-03-20 2005-01-12 Arvin Technologies, Inc. Apparatus and method for releasing a filter from a filter cap of a filter assembly
EP1494778A4 (en) * 2002-03-20 2010-04-07 Purolator Filters Na Llc Apparatus and method for releasing a filter from a filter cap of a filter assembly
WO2004011121A1 (en) * 2002-07-31 2004-02-05 Caterpillar Inc. Replaceable filter with locking mechanism
EP1936306A2 (en) * 2006-12-19 2008-06-25 Whirlpool Corporation Water filter removal and installation tool
EP1936306A3 (en) * 2006-12-19 2014-01-01 Whirlpool Corporation Water filter removal and installation tool

Also Published As

Publication number Publication date
DE19642641C2 (en) 1998-03-19
GB9623420D0 (en) 1997-01-08
DE19642641A1 (en) 1997-05-28
FR2741548A1 (en) 1997-05-30

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)