EP0264547B1 - Couvercle étanche, en particulier pour le bloc contenant le vilebrequin et les transmissions mécaniques de véhicules - Google Patents

Couvercle étanche, en particulier pour le bloc contenant le vilebrequin et les transmissions mécaniques de véhicules Download PDF

Info

Publication number
EP0264547B1
EP0264547B1 EP87109840A EP87109840A EP0264547B1 EP 0264547 B1 EP0264547 B1 EP 0264547B1 EP 87109840 A EP87109840 A EP 87109840A EP 87109840 A EP87109840 A EP 87109840A EP 0264547 B1 EP0264547 B1 EP 0264547B1
Authority
EP
European Patent Office
Prior art keywords
sealing
cover
flange surface
radial
housing
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
EP87109840A
Other languages
German (de)
English (en)
Other versions
EP0264547A3 (en
EP0264547A2 (fr
Inventor
Hans Dipl.-Ing. Deuring
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.)
Cessione goetze Elastomere GmbH
Original Assignee
Goetze 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 Goetze GmbH filed Critical Goetze GmbH
Publication of EP0264547A2 publication Critical patent/EP0264547A2/fr
Publication of EP0264547A3 publication Critical patent/EP0264547A3/de
Application granted granted Critical
Publication of EP0264547B1 publication Critical patent/EP0264547B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00—Casings, e.g. crankcases or frames
    • F02F7/0065—Shape of casings for other machine parts and purposes, e.g. utilisation purposes, safety
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F11/00—Arrangements of sealings in combustion engines 
    • F02F11/007—Arrangements of sealings in combustion engines  involving rotary applications

Definitions

  • the invention relates on the one hand to a housing closure cover with a shaft extending through the cover in the installed state with a dynamically acting seal for the shaft and a statically acting seal for the cover flange surface, the dynamic seal consisting of at least one, possibly spring-loaded, elastic sealing lip vulcanized onto the cover and the static seal consists of axially protruding, elastic sealing strips vulcanized into recesses in the sealing flange surface.
  • the invention on the other hand relates to a housing cover with a shaft extending in the installed state through the cover for crankshaft housings with an oil pan that can be flanged from below, with a dynamic seal for the shaft and two statically sealed flange surfaces that meet at an angle of usually 90 °, one of which is radial to tight connection with the crankshaft housing and the other axially extends to the tight connection with the oil pan, the dynamic seal consisting of at least one spring-loaded, elastic, vulcanized sealing lip, while for the static sealing of both flange surfaces axially or radially from the Flange surfaces projecting sealing strips are vulcanized.
  • crankshaft seal for internal combustion engines.
  • a sealing ring is pressed into a pressed sheet metal cover and is used exclusively to seal a shaft that is guided through the housing.
  • the crankshaft seal consists of several separate components, which involve a lot of assembly work when assembled.
  • additional measures must be taken for static sealing.
  • housing closure covers have already been created which have a combined seal, namely for the static as well as for the dynamic sealing point.
  • DE-PS 33 05 765 discloses such a housing cover.
  • This housing cover consists of an aluminum die-cast body, on the inner circumference of which an elastic sealing lip is arranged for sealing the continuous crankshaft, while for sealing the radial flange surface to be connected to the crankshaft housing and the axial flange surface to be connected to the oil pan, sealing limits in Form of elastic sealing strips vulcanized into grooves in the flange surfaces are provided. Additional radial and axial grooves with sealing strips provide a connection to the dynamic one Sealing lip produced, whereby the vulcanization of the sealing elements is particularly easy, especially in the transfer or compression molding process.
  • the task of the new invention is now to simplify the base body of the closure cover, in particular to minimize its processing outlay.
  • the cover consists of a profile-drawn sheet metal body with an essentially cup-shaped cross-section and has three radial surfaces arranged axially offset from one another, the bottom surface of the sheet metal body being the radial flange surface for connection to the lockable housing and the second, offset in stages Radial surface for receiving the sealing strips and the third radial surface for connecting the dynamic sealing lip.
  • grooves are no longer required to be milled in to accommodate the sealing strips.
  • the central radial surface which can also be formed when the tin pot is pulled, is used to hold and fasten the sealing strips. Due to the stepped design of the tin pot base, the incompressible material of the sealing strip can also move radially in the installed state.
  • the cover is drawn from a sheet metal body with an approximately cup-shaped cross-section, the radial flange surface being in the region of the inner circumference and the radial flange being in the region of the transition point Nsch measurements to the axial flange surface of the tin pot is profiled such that a recessed there is an additional area for receiving or connecting the sealing strips for the static sealing
  • This third, recessed radial flange surface thus allows in a simple manner the known connection of an uninterrupted sealing strip running in both planes with an angular configuration in the region of the radial and axial flange surfaces meeting at 90 °.
  • the graded profiling of the sheet metal body cross section contributes to a substantial stiffening of the same, so that it can be produced from relatively thin sheet metal and is thus much lighter in the finished state than the previously known aluminum die-cast body.
  • the sealing strips are vulcanized essentially in the transition region of the rounded edges of the recessed surface of the tin pot.
  • the rounding of the edges resulting from the pulling of the sheet metal body offers a relatively large base area for connecting the sealing strips, which should be made relatively narrow with their axially or radially projecting area and with a rectangular cross section, which is conducive to the sealing function.
  • sealing strip running parallel to the axial flange surface emerges at an acute angle to the radial or axial flange surface.
  • the housing closure cover shown in FIGS. 1 to 4 serves to seal a crankshaft housing of a motor vehicle engine with an oil pan that can be flanged from below.
  • the housing cover is shown in its commercial form.
  • the housing cover consists of a pot-shaped sheet metal body (1) which, to seal the crankshaft (not shown) that passes through when installed, has a dynamically loaded sealing ring (2) made of elastomer material and statically acting sealing strips (3 and 4), also made of elastomer material , which merge into one another.
  • the sheet metal body has three radial flange surfaces, the sealing ring (2) being attached to the flange surface (5), while the sealing strips (3 and 4) are vulcanized in the area of the flange surface (7) that is axially recessed relative to the flange surface (6).
  • the latter are connected to the sheet metal body with a relatively wide base area in the rounded sheet metal body region between the radial faces (6 and 7) and extend axially with a relatively narrow web (8) which emerges from the flange face (6).
  • the sheet metal body (1) with the flange surface (6) is braced against the (not shown) crankshaft housing with the aid of screws which can be inserted through the holes (9).
  • This flange connection is sealed by means of the sealing strip (3), in particular its axially protruding web (8).
  • the sealing strip (4) is used to seal the oil pan (not shown) which can be screwed against the crankshaft housing from below, which - as can be seen in FIG. 2 - at an acute angle both from the radial flange surface (6) and also emerges from the axial flange surface (10).
  • the oil pan (not shown) which can be screwed against the crankshaft housing from below, which - as can be seen in FIG. 2 - at an acute angle both from the radial flange surface (6) and also emerges from the axial flange surface (10).
  • two nuts (11) are welded into the cover, see Figure 1.
  • the holes (12) for receiving centering pins must be pointed out.
  • FIG. 5 shows a simplified, ring-shaped housing closure cover made of a sheet metal body (1 '), the sealing strip (3') being profiled in the area of its surface with two concentric and ring-shaped beads (13, 14).

Claims (6)

  1. Couvercle étanche de bloc avec, lorsqu'il est monté, un arbre s'étendant au travers du couvercle et comportant une étanchéité pour l'arbre, efficace en dynamique, et une étanchéité pour la surface de bride du couvercle, efficace en statique, dans lequel l'étanchéité est constituée au moins par une lèvre (2) d'étanchéité élastique, le cas échéant sollicitée par un ressort et vulcanisée au couvercle et l'étanchéité statique par des bandes (3,4) d'étanchéité élastiques, saillant axialement et vulcanisées dans des réserves de la surface de bride étanche, caractérisé en ce qu'un couvercle constitué d'un corps (1) en tôle emboutie admet une section transversale essentiellement en forme de cuvette et présente trois surfaces (5,6,7) radiales disposées axialement en retrait les unes par rapport aux autres, la surface du fond du corps (1) en tôle servant de surface de bride radiale en vue de l'assujettissement du bloc pouvant étre fermé de facon étanche, la deuxième surface (7) radiale disposée en gradin et en retrait par rapport à la première servant à accueillir les bandes (3,4) d'étanchéité et la troisième surface radiale servant à fixer la lèvre (2) d'étanchéité dynamique.
  2. Couvercle étanche de bloc avec, lorsqu' il est monté, un arbre s'étendant au travers du couvercle ainsi qu'une gouttière à huile adaptée à être bridée par en dessous et comportant une étanchéité dynamique pour l'arbre de même que deux surfaces (6,10) de bride à rendre étanches en statique et se rejoignant sous en angle valant d'ordinaire 90°, la première s'étendant radialement en vue d'une fixation étanche sur le bloc de vilebrequin et la seconde s'étendant axialement en vue d'une fixation étanche de la gouttière à huile, dans lequel l'étanchéité dynamique est constituée par au moins une lèvre d'étanchéité vulcanisée à lui, élastique, le cas échéant sollicitée par un ressort, tandis que, pour l'étanchéité statique des deux surfaces (6,10) de bride, des bandes (3,4) d'étanchéité saillant axialement, respectivement radialement sur les surfaces (6,10) de bride sont vulcanisées dessus, caractérisé en ce que le couvercle est constitué par un corps (1) en tôle emboutie pour l'essentiel en forme de cuvette qui, dans la zone de la périphérie intérieure de la surface (6) de bride radiale et dans la zone de transition entre la surface (6) de bride radiale et celle (10) axiale, est profilé avec des gradins de sorte qu'une autre surface (7) est definie en retrait afin d'accueillir, respectivement d'assujettir les bandes (3,4) d'étanchéité servant à rendre étanches les deux surfaces (6,10) de bride.
  3. Couvercle étanche de bloc selon la revendication 1 ou la revendication 2, caractérisé en ce que les bandes (3,4) d'étanchéité sont vulcanisées pour l'essentiel dans la zone de transition des bords arrondis de la surface (7) de bride formée en retrait de la surface (6) de bride.
  4. Couvercle étanche de bloc selon la revendication 3, caractérisé en ce que la bande (3) d'étanchéité présente un profil (8) de section transversale saillant axialement de la surface (6) de bride radiale et à peu près à angle droit.
  5. Couvercle étanche de bloc selon la revendication 3, caractérisé en ce que la bande (4) d'étanchéité se prolongeant en ligne droite parallèlement à la surface (10) de bride axiale saille sous en angle aigu de la surface (10) de bride axiale.
  6. Couvercle étanche de bloc selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la bande (3') d'étanchéité présente une surface extérieure profilée plusieurs fois.
EP87109840A 1986-10-11 1987-07-08 Couvercle étanche, en particulier pour le bloc contenant le vilebrequin et les transmissions mécaniques de véhicules Expired - Lifetime EP0264547B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3634735 1986-10-11
DE19863634735 DE3634735A1 (de) 1986-10-11 1986-10-11 Verschlussdeckel, insbesondere fuer kurbelwellen- und getriebegehaeuse bei kraftfahrzeugen

Publications (3)

Publication Number Publication Date
EP0264547A2 EP0264547A2 (fr) 1988-04-27
EP0264547A3 EP0264547A3 (en) 1989-03-15
EP0264547B1 true EP0264547B1 (fr) 1991-04-03

Family

ID=6311572

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87109840A Expired - Lifetime EP0264547B1 (fr) 1986-10-11 1987-07-08 Couvercle étanche, en particulier pour le bloc contenant le vilebrequin et les transmissions mécaniques de véhicules

Country Status (5)

Country Link
US (1) US4928980A (fr)
EP (1) EP0264547B1 (fr)
JP (1) JPS63243573A (fr)
DE (1) DE3634735A1 (fr)
ES (1) ES2021639B3 (fr)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5152538A (en) * 1988-03-21 1992-10-06 Chicago Rawhide Manufacturing Company, Inc. Composite seal assembly
JPH0738768Y2 (ja) * 1989-10-17 1995-09-06 エヌオーケー株式会社 密封装置
DE4015409C1 (fr) * 1990-05-14 1991-06-13 Audi Ag, 8070 Ingolstadt, De
DE4016020C2 (de) * 1990-05-18 1994-06-16 Goetze Ag Gehäuseverschlußdeckel
EP0503143B2 (fr) * 1991-03-11 2000-04-05 CR Elastomere GmbH Couvercle de fermeture de carter
DE4134316C3 (de) * 1991-03-11 2000-01-13 Cr Elastomere Gmbh Gehäuseverschlußdeckel
DE4107783C2 (de) * 1991-03-11 1999-05-27 Cr Elastomere Gmbh Gehäuseverschlußdeckel
DE4112937A1 (de) * 1991-04-20 1992-10-22 Goetze Ag Gehaeuseverschlussdeckel
DE4115922A1 (de) * 1991-05-16 1992-11-19 Freudenberg Carl Fa Kurbelwellendichtung fuer eine verbrennungskraftmaschine
DE4127067C1 (fr) 1991-08-16 1993-03-25 Goetze Ag, 5093 Burscheid, De
DE4136890C2 (de) * 1991-11-09 1995-08-03 Goetze Elastomere Gmbh Gehäuseverschlußdeckel
BR9201708A (pt) * 1992-04-29 1993-11-03 Sabo Ind & Comercio Ltda Sistema integrado de vedacao
DE4216568C2 (de) * 1992-05-20 1995-02-16 Freudenberg Carl Fa Kurbelwellendichtung für eine Verbrennungskraftmaschine
DE4217131C1 (de) * 1992-05-23 1993-12-16 Goetze Ag Gehäuseverschlußdeckel
US5228420A (en) * 1992-09-25 1993-07-20 Tsuchiya Mfg. Co., Ltd. Valve rocker cover
US5263444A (en) * 1993-02-16 1993-11-23 General Motors Corporation Seal, and sealed T-joint
DE59300750D1 (de) * 1993-03-12 1995-11-16 Bruss Dichtungstechnik Verfahren zum Herstellen einer Abdichtung.
EP0615085B2 (fr) * 1993-03-12 2000-01-26 Dichtungstechnik G. Bruss GmbH & Co. KG Méthode de fabrication d'un joint d'étanchéité à lèvres
DE59302516D1 (de) * 1993-03-12 1996-06-13 Bruss Dichtungstechnik Verfahren zum Herstellen einer Wellenabdichtung
JP3177086B2 (ja) * 1994-02-07 2001-06-18 エヌオーケー株式会社 密封装置
DE4426910C2 (de) * 1994-07-29 1999-02-04 Cr Elastomere Gmbh Gehäuseverschlußdeckel
DE19528379C1 (de) * 1995-08-02 1996-10-02 Ford Werke Ag Statische Dichtung für ein Gehäuse an einer Brennkraftmaschine, insbesondere für Verschlußdeckel an Kurbelwellen- und Getriebegehäusen
BR9505422A (pt) * 1995-12-14 1997-10-28 Sabo Ind & Comercio Ltda Sistema semi-integrado de vedação
US5603297A (en) * 1996-01-18 1997-02-18 Acoust-A-Fiber Research And Development, Inc. Heat Shield
DE19606531C2 (de) * 1996-02-22 1998-10-01 Cr Elastomere Gmbh Aus Blech gefertigter Verschlußdeckel für Kurbelwellengehäuse bei Kraftfahrzeugen
DE19606532C2 (de) 1996-02-22 1998-06-18 Cr Elastomere Gmbh Verschlußdeckel, insbesondere für Motor- und Getriebegehäuse bei Kraftfahrzeugen
DE19711400C2 (de) * 1997-03-19 2001-12-06 Freudenberg Carl Fa Radialwellendichtring
US6065757A (en) * 1998-07-02 2000-05-23 Caterpillar Inc. Flywheel housing
US20040201181A1 (en) * 2003-04-09 2004-10-14 Williamson Alexander S. Flange seal
US7334555B2 (en) * 2004-02-02 2008-02-26 Freudenberg-Nok General Partnership Stamped crankshaft seal retainer plate and molded encoder sensor support feature
DE102004030203B4 (de) * 2004-06-22 2010-01-07 Federal-Mogul Sealing Systems Bretten Gmbh Dichtung
CN113719612A (zh) * 2021-07-29 2021-11-30 岚图汽车科技有限公司 一种发动机油底壳密封结构、发动机及汽车

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE720953C (de) * 1940-03-14 1942-05-20 Kloeckner Humboldt Deutz Ag Kurbelwellenabdichtung fuer Brennkraftmaschinen
US2487669A (en) * 1946-12-16 1949-11-08 Milton D Pattullo Journal box seal
US3053542A (en) * 1958-05-12 1962-09-11 Continental Motors Corp Crankcase and split ring seal construction
US3363952A (en) * 1965-09-03 1968-01-16 Timken Roller Bearing Co Dual lip seal
US3913924A (en) * 1973-08-31 1975-10-21 Federal Mogul Corp Rotary shaft seal with expandable outer periphery
US4208057A (en) * 1976-03-08 1980-06-17 Garlock Inc. Semi-unitized shaft seal and method
US4336945A (en) * 1977-03-18 1982-06-29 Cr Industries Sinuous seal with auxiliary excluder lips
JPS6143003Y2 (fr) * 1978-08-23 1986-12-05
US4252329A (en) * 1979-02-26 1981-02-24 Garlock Inc. Semi-unitized shaft seal
JPS5655758A (en) * 1979-10-11 1981-05-16 Arai Pump Mfg Co Ltd Oil seal
DE3305765C1 (de) * 1983-02-19 1984-06-28 Goetze Ag, 5093 Burscheid Verschlussdeckel
JPS6160A (ja) * 1984-04-20 1986-01-06 Ube Ind Ltd ４、４′−アゾビス（４−シアノ吉草酸）の製造法

Also Published As

Publication number Publication date
JPS63243573A (ja) 1988-10-11
US4928980A (en) 1990-05-29
DE3634735C2 (fr) 1989-06-22
DE3634735A1 (de) 1988-04-21
EP0264547A3 (en) 1989-03-15
ES2021639B3 (es) 1991-11-16
EP0264547A2 (fr) 1988-04-27

Similar Documents

Publication Publication Date Title
EP0264547B1 (fr) Couvercle étanche, en particulier pour le bloc contenant le vilebrequin et les transmissions mécaniques de véhicules
EP0120123B1 (fr) Couvercle de fermeture
DE3511333A1 (de) Vereinheitlichte dichtungen und verfahren zu ihrem zusammensetzen
DE2916198A1 (de) Fluessigkeitsfiltereinheit
DE2011438A1 (de) Abdeckung für eine Brennkraftmaschine
DE4406737A1 (de) Maschinendeckel, Dichtung hierfür und Anordnung aus Maschinendeckel und Dichtung
DE3037763C2 (de) Metallrand-Öldichtung
DE2624001A1 (de) Zweiteiliges mit innerer auskleidung versehenes pumpengehaeuse fuer hohe druecke
DE4134316C2 (fr)
EP0985090B1 (fr) Joint de carter
EP1629223B1 (fr) Procede de production d'un joint plat et joint plat
DE10306602A1 (de) Dichtsystem für eine Welle
EP0791740B1 (fr) Couvercle d'étanchéité pour le bâtiment d'un moteur ou dispositif d'entraínement pour un véhicule
EP0541967B1 (fr) Couvercle de bâti
DE4016020C2 (de) Gehäuseverschlußdeckel
DE2255449C3 (de) Einteiliger Dichtring aus elastischem Werkstoff zum Abdichten einer Welle in einem geteilten Maschinengehäuse
EP0503143B1 (fr) Couvercle de fermeture de carter
DE4116652C1 (fr)
DE4112937C2 (fr)
DE4306452A1 (de) Integriertes Dichtungssystem
DE102019110445A1 (de) Gelenklager
DE2559471A1 (de) Abdichtung einer welle gegenueber einem geteilten maschinengehaeuse
DE2946517A1 (de) Anodnung mit einer zylinderkopfdichtung
DE2604517A1 (de) Wellendichtring
DE7241572U (de) Dichtring zum Abdichten einer Welle in einem Maschinengehäuse

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: A2

Designated state(s): DE ES FR GB IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): DE ES FR GB IT

17P Request for examination filed

Effective date: 19890417

17Q First examination report despatched

Effective date: 19891215

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): ES FR GB IT

ITF It: translation for a ep patent filed

Owner name: ING. C. GREGORJ S.P.A.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
ET Fr: translation filed
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
REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

REG Reference to a national code

Ref country code: FR

Ref legal event code: TP

ITPR It: changes in ownership of a european patent

Owner name: TRASFORMAZIONE SOCIE;GOETZE AG

ITPR It: changes in ownership of a european patent

Owner name: CESSIONE;GOETZE ELASTOMERE GMBH

REG Reference to a national code

Ref country code: ES

Ref legal event code: PC2A

Owner name: CR ELASTOMERE GMBH

REG Reference to a national code

Ref country code: FR

Ref legal event code: CD

REG Reference to a national code

Ref country code: GB

Ref legal event code: IF02

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

Ref country code: ES

Payment date: 20050727

Year of fee payment: 19

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

Ref country code: FR

Payment date: 20060717

Year of fee payment: 20

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

Ref country code: GB

Payment date: 20060726

Year of fee payment: 20

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

Ref country code: IT

Payment date: 20060731

Year of fee payment: 20

REG Reference to a national code

Ref country code: GB

Ref legal event code: PE20

REG Reference to a national code

Ref country code: ES

Ref legal event code: FD2A

Effective date: 20070709

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

Ref country code: GB

Free format text: LAPSE BECAUSE OF EXPIRATION OF PROTECTION

Effective date: 20070707

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 EXPIRATION OF PROTECTION

Effective date: 20070709