EP0992740B1 - Dichtung aus Elastomer für Backofen - Google Patents

Dichtung aus Elastomer für Backofen Download PDF

Info

Publication number
EP0992740B1
EP0992740B1 EP19980830589 EP98830589A EP0992740B1 EP 0992740 B1 EP0992740 B1 EP 0992740B1 EP 19980830589 EP19980830589 EP 19980830589 EP 98830589 A EP98830589 A EP 98830589A EP 0992740 B1 EP0992740 B1 EP 0992740B1
Authority
EP
European Patent Office
Prior art keywords
gasket
flange
base
metal elements
cavity
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 - Fee Related
Application number
EP19980830589
Other languages
English (en)
French (fr)
Other versions
EP0992740A1 (de
Inventor
Angelo Faccoli
Alessandro Carmelli
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.)
Posa SpA
Original Assignee
Posa SpA
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 Posa SpA filed Critical Posa SpA
Priority to EP19980830589 priority Critical patent/EP0992740B1/de
Priority to DE1998603455 priority patent/DE69803455T2/de
Priority to ES98830589T priority patent/ES2170468T3/es
Publication of EP0992740A1 publication Critical patent/EP0992740A1/de
Application granted granted Critical
Publication of EP0992740B1 publication Critical patent/EP0992740B1/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/02—Doors specially adapted for stoves or ranges
    • F24C15/021—Doors specially adapted for stoves or ranges sealings for doors or transparent panel

Definitions

  • the present invention relates to an elastomeric sealing gasket, made in particular of silicone rubber, particularly for cooking oven doors.
  • gaskets may be full-frame, that is, consisting of four sides joined together to form a rectangle, or open-frame. Since there is less heat loss in the lower area of the oven, provision is normally made for open-frame gaskets, in which a portion of the lower side is missing, or three-sided open-frame gaskets, in which the lower side is completely missing.
  • these gaskets were obtained by joining together a plurality of pieces whose length coincided with that of the sides of the frame, and fixing them to the oven by suitable hooking means, provided in the gasket, that engaged in special holes in in the oven structure.
  • the gaskets currently used are obtained by bending, and possibly joining at the ends, a single hollow strip with hooking means situated at least in the areas where the strip is bent, namely at the corners of the frame.
  • Metal inserts having a widened base that is inserted in a corresponding hole or slit made in the flat bottom wall of the gasket are used as hooking means.
  • Said widened base of the corner insert is curved in a crescent shape and is almost always manually inserted into the hollow part of the gasket through the hole provided on the bottom of the gasket itself.
  • a hook that engages in a corresponding hole provided on the oven structure protrudes from the base of the metal insert through the hole provided in the gasket.
  • two terminal metal inserts are provided that are inserted through the ends of the gasket and are normally fixed with adhesive.
  • FR-A-2 553 170 describes an elastic gasket having a longitudinal C-shaped cavity, in which metal inserts provided with hooking elements for fixing the gasket to a support are inserted. These metal inserts can have a curved shape with a predetermined radius of curvature, in the event that the gasket has to follow a curved profile once mounted.
  • DE 3 509 928 describes an elastic gasket for the door of an electrical appliance, which is fixed by means of metal inserts having a base that is inserted into the hollow profile of the gasket.
  • This base has a plurality of notches that allow it to be bent. Insertion of the insert in to the gasket can cause tearing thereof.
  • a further drawback of this insert is caused by the fact that if the base is made thin enough to allow bending, it is not very strong and tends to crease in the plane perpendicular to the plane of use of the gasket. If, on the other hand, the base of the insert is made thick enough to avoid this creasing, great difficulty is encountered in giving it the necessary curvature along the corners of the door.
  • the object of the invention is to eliminate the aforementioned drawbacks, providing a gasket for cooking oven doors that allows precise adaptation to the radius of curvature of the corner joins of the mouth of the oven, eliminating any risk of tearing the gasket in the areas where the metal inserts with fixing hooks are housed.
  • Another object of the invention is to provide such a gasket that is economical and allows rapid, automatic fixing of the metal inserts.
  • a cavity is obtained therein that is open on the outside for insertion of suitably shaped- metal inserts, possibly after preliminary treatment of the cavity with silicone glue.
  • the metal inserts have a base provided with a plurality of crosswise notches, forming an indentation on the inner side, and a hook protruding from said base for engagement in a hole in the oven structure.
  • the indentation on the inner side of the base of the insert allows easy bending thereof, to cause it to take on a curved shape, which is necessary when the inserts are placed at the corners of the frame.
  • This bending of the bases of the metal inserts can be done when they are fitted on the gasket or, more advantageously, during installation of the gasket on the oven. In the latter case there is the advantage of obtaining bending of the insert automatically during fitting, of the gasket, when it is slightly stretched to bring the various hooks into engagement with the corresponding holes provided in the oven structure.
  • the cavity made in the gasket is L-shaped, with a horizontal branch parallel to the bottom wall of the gasket, and the other branch entering perpendicularly into the thickness of gasket.
  • the cross section of the base of the metal insert has an L-shaped profile, thus causing stiffening in the plane perpendicular to that containing the indentation.
  • stiffening ribs are advantageously, provided both coinciding with the protruding hook and with the flange of the insert perpendicular to one containing the indentation.
  • the gasket according to the invention can be produced in a completely automated fashion and therefore at low-cost.
  • the gasket for cooking ovens comprises a continuous elastomeric strip 1, in particular of silicone rubber, and a plurality of metal elements 2, 2', 2", whose function will be described below.
  • the continuous strip 1, obtained by extrusion, has a substantially L-shaped cavity or longitudinal seat 3, which has a continuous opening 4 extending along a flat bottom wall 5 of the gasket.
  • a branch 3' of the L-shaped cavity 3 extends parallel to the wall 5, whilst the other branch 3", which is shorter, extends perpendicularly to the first downward into the body of the strip 1.
  • a protruding, longitudinal fin 8 is provided on the opposite side of the wall 5 to form a seal against the complementary element of the oven where the gasket is interposed, in particular against the oven door.
  • the fin 8 can be directed, depending on the solutions adopted, so as to point inwards, as illustrated in the appended figures, or outwards, indifferently.
  • the strip 1 has a tubular inner chamber 9, but it is obvious that said chamber 9 is not essential for the purposes of the invention and could be omitted.
  • Figure 1 diagrammatically shows a gasket 10 with four sides, forming a closed rectangular frame
  • Figure 2 diagrammatically illustrates a gasket 100 with three sides forming an open frame without the lower side
  • Figure 3 shows a gasket 1000 with a rectangular open frame, without a portion of the lower side.
  • metal hooking elements 2, 2' are used to fix the gaskets to the corresponding wall of the oven, whilst the metal element 2", shown hatched in Figure 1, acts as a joining element to join the ends of the closed-frame gasket 10 in Figure 1.
  • the end join of the gasket in Figure 1 could be made in other ways, for example by gluing the end edges of the gasket directly to one another.
  • the metal element 2 advantageously obtained by shearing and bending a metal sheet, particularly of stainless steel, has a base 20, L-shaped in section, and a central element 21 protruding on the outside and bent to form a hook.
  • the hook 21 protrudes from a flat flange 20' of the base 20 and foresees a first portion 21' substantially perpendicular to the flange 20', a second portion 21" substantially parallel to the flange 20' and a third end portion 21''' inclined towards the outside with respect to the flange 20'.
  • the base 20 foresees, starting from its free edge, a series of substantially V-shaped notches 22, the other flange 20" of the base 20 extending perpendicularly to the flange 20' in the opposite direction to that toward which the hook 21 protrudes.
  • the purpose of the notches 22 is to allow bending of the metal element in the plane of the flange 20'.
  • the tips of the V-shaped notches 22 are disposed in the plane of the flange 20' of the L-shaped base, at a certain distance from its edge.
  • the depth of the notches 22 could be increased, until they also partially involve the other flange 20" of the base 20.
  • the flange 20" of the base 20 serves to stiffen the metal element in the plane perpendicular to that of the flange 20' and thus prevent the metal element from bending in said plane.
  • a longitudinal rib 50 is provided on the flange 20' (see particularly Figures 8 and 8A).
  • a similar rib 51 is provided on the hook 21 to increase the strength of the latter.
  • a possible further stiffening rib could also be provided at the longitudinal edge of the L-shaped base 20 or in the proximity of said edge on the flange 20'.
  • the dimensions of the L-shaped base 20 of the metal element 2 are such that it can fit perfectly in the cavity 3 of the gasket, as shown in the appended figures.
  • silicone adhesive can preferably be placed in the cavity 3, before the metal element 2 is inserted, so as to ensure a better hold.
  • the hook 21 obviously protrudes from the opening 4 provided on the bottom wall 5 of the gasket.
  • FIGS 9A and 9b which do not form part of the invention, illustrate a metal hooking element 2' to be placed at or near free ends of the open-frame gaskets 100 and 1000 shown in Figures 2 and 3.
  • This element 2' has a flat base 20 and a hook 21' provided on the longitudinal axis of the base 20, protruding from one end thereof
  • a rib 52 is provided longitudinally to the element 2', on one side of the base 20, and extends to involve the terminal hook 21', in order to give the metal element greater stiffness.
  • Respective series of teeth 55 are provided on the two opposite edges of the base 20, in order to improve the grip with the inner walls of the gasket at the branch 3' of the seat 3, in which the element 2' is housed.
  • the metal element 2 when present, acts as a joining element to make the end join of the four-sided gasket shown in Figure 1 and in practice comprises a flat base 20, similar to that of the element 2' in Figures 9A and 9B, without the terminal hook 21' or with the said terminal hook unbent.
  • the shape of the metal element 2 with an L-shaped section and possible reinforcing ribs makes it possible to use very small thicknesses of material, for example of the order of 0.4-0.5 mm, though maintaining a considerable thickness of the element in the plane perpendicular to the plane of the flange 20'. In this way any risk of bending of the metal elements 2 in this plane, for example when the housewife lifts the gasket during cleaning of the oven, is avoided.
  • the flange 20" further helps to distribute on a very wide surface both the stresses due to normal functioning and the stresses casually caused by the housewife when cleaning the oven.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)

Claims (9)

  1. Eine speziell für Backöfen geeignete Elastomerdichtung, die zwischen eine vorderen Einfassung des Ofens und eine entsprechende Tür eingesetzt wird, wobei die genannte Dichtung einen durchgehenden Streifen (1) umfaßt, der mit mit Haken (21) versehenen Metallelementen ausgerüstet ist, und der Streifen (1) eine durchgehende Längsaushöhlung oder einen Sitz (3) mit einer äußeren Öffnung (4) für die Unterbringung der Basen (20) der Metallelemente (2) aufweist, die mit Haken (21) ausgestattet sind, die in an der Ofenstruktur vorgesehene Löcher einrasten können, wobei zumindest die Basis (20) der Elemente (2), die dazu bestimmt sind, an den Ecken der Dichtung angebracht zu werden, eine Reihe von Kerben (22) an einer der beiden Seiten aufweist, um die Biegung des Elements (2) auf der Ebene der genannten Basis (20) zu ermöglichen, dadurch gekennzeichnet, daß die genannte Aushöhlung (3) in Streifen (1) und die genannte Basis (20) des Metalleckenelements (2) im Querschnitt L-förmig ausgebildet sind, wobei eine erste Abzweigung (3') der genannten Aushöhlung (3) sich parallel zur unteren Wand (5) der Dichtung erstreckt, in der sich die genannte Öffnung (4) befindet, und die andere Abzweigung (3") sich rechtwinklig zur ersten Abzweigung (3') nach unten in den Dichtungskörper erstreckt, und die Basis 20 der genannten Metallelemente (2) einen ersten Flansch (20') aufweist, der mit den genannten Kerben (22) versehen ist, und einen weiteren Flansch (20"), der rechtwinklig zum ersten verläuft, wobei die Flansche (20', 20") jeweils in den Abzweigungen (3', 3") der Aushöhlung (3) untergebracht werden können.
  2. Eine Dichtung nach Anspruch 1, dadurch gekennzeichnet, daß die genannten Kerben (22) eine im wesentlichen V-förmige Form aufweisen, wobei der breite Teil der V-förmigen Öffnung sich am freien Längsrand des genannten ersten Flanschs (20') befindet.
  3. Eine Dichtung nach Anspruch 2, dadurch gekennzeichnet, daß die genannten Kerben (22) teilweise nur den ersten Flansch (20') der genannten Basis (20) der Metallelemente (2) betreffen.
  4. Eine Dichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die genannten Kerben (22) sich auf dem ersten Flansch (20') der Basis (20) der genannten Elemente (2) erstrecken, bis sie teilweise den anderen Flansch (20") betreffen.
  5. Eine Dichtung nach einem beliebigen der vorausgegangenen Ansprüche, dadurch gekennzeichnet, daß die genannten Haken (21) der Metallelemente (2) einen ersten Teil (21') vorsehen, der im wesentlichen rechtwinklig zum ersten Flansch (20') der genannten Basis (20) der Metallelemente verläuft, einen zweiten Teil (21"), der im wesentlichen parallel zum genannten ersten Flansch (20') verläuft, und einen dritten Endteil (21"'), der im Vergleich zum ersten Flansch (20') nach außen geneigt ist.
  6. Eine Dichtung nach einem beliebigen der vorausgegangenen Ansprüche, dadurch gekennzeichnet, daß die genannten Metallelemente (2) mit Verstärkungsrippen (50, 51) versehen sind.
  7. Eine Dichtung nach Anspruch 6, dadurch gekennzeichnet, daß eine der genannten Rippen (50) sich längs in Richtung des anderen Flanschs (20") der Basis des Elements (2) erstreckt, während die andere der genannten Rippen (51) den Haken (21) des genannten Elements betrifft.
  8. Eine Dichtung nach einem beliebigen der vorausgegangenen Ansprüche, dadurch gekennzeichnet, daß die genannten Metallelemente (2) durch Silikonklebstoff in der genannten Aushöhlung (3) gehalten wird, der vor oder nach dem Einsatz der genannten Elemente in die Aushöhlung aufgetragen wird.
  9. Eine Dichtung gemäß einem beliebigen der vorausgegangenen Ansprüche, dadurch gekennzeichnet, daß die genannte Basis (20) des Eckverhakungselements (2) nach dessen Anbringung auf den Streifen (1) gebogen wird.
EP19980830589 1998-10-07 1998-10-07 Dichtung aus Elastomer für Backofen Expired - Fee Related EP0992740B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19980830589 EP0992740B1 (de) 1998-10-07 1998-10-07 Dichtung aus Elastomer für Backofen
DE1998603455 DE69803455T2 (de) 1998-10-07 1998-10-07 Dichtung aus Elastomer für Backofen
ES98830589T ES2170468T3 (es) 1998-10-07 1998-10-07 Junta elastomerica de estanqueidad para hornos de coccion.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19980830589 EP0992740B1 (de) 1998-10-07 1998-10-07 Dichtung aus Elastomer für Backofen

Publications (2)

Publication Number Publication Date
EP0992740A1 EP0992740A1 (de) 2000-04-12
EP0992740B1 true EP0992740B1 (de) 2002-01-09

Family

ID=8236819

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19980830589 Expired - Fee Related EP0992740B1 (de) 1998-10-07 1998-10-07 Dichtung aus Elastomer für Backofen

Country Status (3)

Country Link
EP (1) EP0992740B1 (de)
DE (1) DE69803455T2 (de)
ES (1) ES2170468T3 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004032931A1 (de) * 2004-07-07 2006-02-02 BSH Bosch und Siemens Hausgeräte GmbH Backofen mit einer Backofentürdichtung

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817949B1 (fr) * 2000-12-07 2003-02-28 Brandt Cooking Joint d'etancheite pour four de cuisson
DE10119789A1 (de) * 2001-04-23 2002-10-24 Bsh Bosch Siemens Hausgeraete Haushaltsgerät, insbesondere Gargerät
DE102012221622A1 (de) * 2012-11-27 2014-05-28 BSH Bosch und Siemens Hausgeräte GmbH Hausgerätetür
JP7065450B2 (ja) * 2019-02-28 2022-05-12 パナソニックＩｐマネジメント株式会社 加熱調理器
KR20220105465A (ko) * 2021-01-20 2022-07-27 엘지전자 주식회사 조리기기
DE102022107074A1 (de) 2022-03-25 2023-09-28 Rational Aktiengesellschaft Türdichtung zum Abdichten von Garräumen
BE1030966B1 (de) * 2022-10-18 2024-05-21 Miele & Cie Gargerät, vorzugsweise mit Selbstreinigungsfunktion und bzw. oder mit Dampfunktion, besonders vorzugsweise Backofen-Dampfgarer-Kombigerät, vorzugsweise mit Selbstreinigungsfunktion

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2106974B (en) 1981-10-06 1985-08-29 Silicone Altimex Ltd Door seal
FR2553170B1 (fr) 1983-10-11 1987-10-30 Gerland Joint d'etancheite en elastomere constitue d'une seule longueur de profile
DE3509928C2 (de) 1985-03-19 1995-05-18 Bosch Siemens Hausgeraete Verfahren zur Herstellung einer elastischen Dichtung
EP0277098B1 (de) 1987-01-21 1992-04-29 GIAT S.r.L. Geschlossener oder offener Rahmen für eine Backofentürdichtung aus Elastomermaterial
FR2730541B1 (fr) * 1995-02-10 1997-05-09 Gessil Ensemble de jointoiement a plat
ATE195174T1 (de) * 1995-08-04 2000-08-15 Posa S P A Dichtung aus elastomer, insbesondere für backofentür

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004032931A1 (de) * 2004-07-07 2006-02-02 BSH Bosch und Siemens Hausgeräte GmbH Backofen mit einer Backofentürdichtung

Also Published As

Publication number Publication date
EP0992740A1 (de) 2000-04-12
ES2170468T3 (es) 2002-08-01
DE69803455D1 (de) 2002-02-28
DE69803455T2 (de) 2003-05-08

Similar Documents

Publication Publication Date Title
US5606784A (en) Article retainer
CA1267679A (en) Refrigerator and method of gasket assembly construction
US4041930A (en) Window unit for oven doors
EP0992740B1 (de) Dichtung aus Elastomer für Backofen
US5139305A (en) Configuration for retaining a window guide profile section
US4023554A (en) Self-contained window unit for oven doors
EP0757209B1 (de) Dichtung aus Elastomer, insbesondere für Backofentür
US4028073A (en) Container for air treating material
US2568800A (en) Vehicle window screen
EP0277098B1 (de) Geschlossener oder offener Rahmen für eine Backofentürdichtung aus Elastomermaterial
US4223660A (en) Removable oven door gasket
US5283995A (en) Door light frame assembly
EP0851177B1 (de) Dichtung aus Elastomer, insbesondere für Backofentür
JP3198851B2 (ja) サイドシルスカッフの取付構造
JPS6217611Y2 (de)
GB2034018A (en) Header Tank Construction
GB2322073A (en) Cover for domestic appliance
US3114949A (en) Fastening device
US5441226A (en) Window mounting bracket
EP1147342B1 (de) Dichtung aus elastomer, insbesondere für türen von backofen oder anderen haushaltsgeräten
EP2035752B1 (de) Ofen
EP1257771B1 (de) Türrahmen mit backofendichtung
GB2044918A (en) Removable stretch gasket for an oven door
JPH0419361Y2 (de)
JPH0337299Y2 (de)

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE ES FR IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20000803

AKX Designation fees paid

Free format text: DE ES FR IT

17Q First examination report despatched

Effective date: 20010228

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE ES FR IT

REF Corresponds to:

Ref document number: 69803455

Country of ref document: DE

Date of ref document: 20020228

ET Fr: translation filed
REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2170468

Country of ref document: ES

Kind code of ref document: T3

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: ES

Payment date: 20030923

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20030929

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20031027

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20041008

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050503

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050630

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051007

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20041008