Source: http://www.google.com/patents/US4709670?dq=7222078
Timestamp: 2016-02-09 15:50:55
Document Index: 702143506

Matched Legal Cases: ['art 3', 'art 4', 'art 3', 'art 4', 'art 4', 'art 3', 'art 4']

Patent US4709670 - Fastening arrangement of a cover hood at a cylinder head - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA cover hood is secured at the cylinder head by means of detachable retaining elements whereby a sealing member is provided between sections of the cylinder head and of the cover hood which are placed at one another. The retaining elements are formed by spring clamps which with mutually facing nose-shaped...http://www.google.com/patents/US4709670?utm_source=gb-gplus-sharePatent US4709670 - Fastening arrangement of a cover hood at a cylinder headAdvanced Patent SearchPublication numberUS4709670 APublication typeGrantApplication numberUS 06/868,322Publication dateDec 1, 1987Filing dateMay 29, 1986Priority dateMay 29, 1985Fee statusLapsedAlso published asDE3519205A1, DE3519205C2Publication number06868322, 868322, US 4709670 A, US 4709670A, US-A-4709670, US4709670 A, US4709670AInventorsHerbert AmpfererOriginal AssigneeDr. Ing.H.C.F. Porsche AktiengesellschaftExport CitationBiBTeX, EndNote, RefManPatent Citations (8), Referenced by (22), Classifications (12), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetFastening arrangement of a cover hood at a cylinder head
US 4709670 AAbstract
A cover hood is secured at the cylinder head by means of detachable retaining elements whereby a sealing member is provided between sections of the cylinder head and of the cover hood which are placed at one another. The retaining elements are formed by spring clamps which with mutually facing nose-shaped support areas engage in adjacent mounting recesses provided in vertical boundary walls of the cover hood and of the cylinder head in such a manner that the direction of action of the support areas of the spring clamps lies approximately on a vertical line that includes a center line of the sections and of the sealing member.
1. A fastening arrangement of a cover hood at a cylinder head of an internal combustion engine, comprising detachable retaining means, and seal means provided between sections of the cylinder head and of the cover hood which are placed adjacent one another, the retaining means being formed by spring clamps exhibiting mutually facing nose-shaped supports areas which apply resilient clamping forces in a clamping direction corresponding to a line through said nose-shaped support areas, said spring clamps being disposed such that the nose-shaped support areas engage in adjacent mounting recesses provided in substantially vertical boundary walls of the cover hood and of the cylinder head in such a manner that the clamping direction of action of the support areas of the spring clamps lies approximately on a vertical line that includes substantially a center line of the sections and of the sealing means.
2. A fastening arrangement according to claim 1, wherein the cover hood consists of plastic and is retained at the cylinder head far-reachingly free of bending moments by means of the spring clamps.
3. A fastening arrangement according to claim 1, wherein the support areas of the spring clamps are provided on their free sides with extensions which are bent away from the cylinder head and from the cover hood.
4. A fastening arrangement according to claim 1, wherein the spring clamps have an arcuate shape.
5. A fastening arrangement according to claim 1, wherein the cover hood consists of light metal and is retained at the cylinder head far-reachingly free of bending movements by means of the spring clamps.
6. A fastening arrangement according to claim 1, wherein the cover hood consists of thin-walled steel sheet metal or the like and is retained at the cylinder head far-reachingly free of bending movements by means of the spring clamps.
7. A fastening arrangement according to claim 1, wherein the spring clamps are delimited by ribs provided at the cover hood and at the cylinder head.
8. A fastening arrangement according to claim 7, wherein the ribs project beyond the contour of the spring clamps.
9. A fastening arrangement according to claim 1, wherein the spring clamps cooperate with the cover hood and the cylinder head exclusively by way of the support areas.
10. A fastening arrangement according to claim 9, wherein the support areas of the spring clamps are provided on their free sides with extensions which are bent away from the cylinder head and from the cover hood.
11. A fastening arrangement according to claim 9, wherein the spring clamps have an arcuate shape.
12. A fastening arrangement according to claim 1, wherein said spring clamps have a rectangular cross section.
13. A fastening arrangement according to claim 12, wherein the spring clamps are delimited by ribs provided at the cover hood and at the cylinder head.
14. A fastening arrangement according to claim 13, wherein the ribs project beyond the contour of the spring clamps.
15. A fastening arrangement according to claim 14, wherein the support areas of the spring clamps are provided on their free sides with extensions which are bent away from the cylinder head and from the cover hood.
16. A fastening arrangement according to claim 15, wherein the spring clamps have an arcuate shape.
17. A fastening arrangement according to claim 16, wherein the spring clamps cooperate with the cover hood and the cylinder head exclusively by way of the support areas.
18. A fastening arrangement according to claim 16, wherein the cover hood consists of plastic and is retained at the cylinder head far-reachingly free of bending moments by means of the spring clamps.
The present invention relates to a fastening arrangement of a cover hood at a cylinder head of an internal combustion engine by means of detachable retaining elements, whereby a sealing member is provided between sections of the cylinder head and cover hood which are attached to one another.
In a known internal combustion engine (DE-OS No. 30 09 302), the cover hood is secured at the cylinder head by means of bolts. For that purpose, fastening eyes are provided at the hood and threaded bores in the cylinder head. This construction entails the disadvantage that not only the fastening eyes and the threaded bores involve relatively high manufacturing expenditures, but also that the relatively long--and also costly--bolts increase the weight of the internal combustion engine.
It is the principal object of the present invention to provide a fastening arrangement of a cover hood at a cylinder head of an internal combustion engine whose retaining elements have a slight weight as well as can be easily manufactured and installed and with which the measures for the mounting of this retaining element at the cylinder head and at the valve cover hood are simple from a manufacturing point of view.
The underlying problems are solved according to the present invention in that the retaining elements are constituted by spring clamps which engage with mutually facing nose-shaped support areas in adjacent mounting recesses provided in vertical boundary walls of the cover hood and of the cylinder head in such a manner that the direction of action of the support areas of the spring clamps lie approximately on a vertical line which includes a center line of the sections and of the sealing member.
The principal advantages attainable with the present invention reside in that the spring clamps together with their support areas are components which can be manufactured in an easy and simple manner. Additionally, the installation expenditure is reduced thereby. Added thereto is the fact that the mounting recessed at the cylinder head and at the cover hood can be realized without any problems from a manufacturing point of view.
This type of fastening is particularly suitable if the cover hood is of lightweight, for example, consists of plastic material, magnesium and thin steel sheet metal parts. On the one hand, a positional determination of the spring clamps is realized by the ribs at the cylinder head, respectively, at the valve hood and, on the other, the spring clamps are covered off thereby. Finally, the possibility exists by the extension of the support areas to release the spring clamps by means of a suitable tool (screwdriver).
FIG. 1 is a partial cross-sectional view through an internal combustion engine within the area of a cylinder head in accordance with the present invention;
FIG. 2 is a partial elevational view, taken in the direction of arrow A of FIG. 1;
FIG. 3 is a partial cross-sectional view, taken along line III--III of FIG. 2; and
FIG. 4 is an elevational view of the detail X of FIG. 1.
Referring now to the drawing wherein like reference numerals are used throughout the various views to designate like parts, and more particularly to FIG. 1, the internal combustion engine generally designated by reference numeral 1 includes within the illustrated area a cylinder head generally designated by reference numeral 2 which is formed by a bottom part 3 and by a top part 4. A cam shaft 5 is arranged between the bottom part 3 and the top part 4 which are assembled in a horizontal plane B--B. Bolts 6 and 7 serve for retaining the top part 4 at the bottom part 3.
A cover hood 8 of plastic material, light metal, thin-walled steel sheet metal or the like is provided above the top part 4 which has a trough-like base shape. Vertical boundary walls 9 of the cover hood 8 are connected with the sections 10 thereof at sections 11 of also vertical boundary walls 12 of the cylinder head 2. A sealing body 13 having an elliptical or circular cross section and consisting of an elastic material is provided between the sections 10 and 11 and assures that the space 14 formed by the cover hood 8 and the cylinder head 2 is closed off oil-tight. A recess 15 is provided at least in the section 10 for mounting the sealing member 13.
Several detachable retaining elements which are formed by spring clamps generally designated by reference numeral 16, serve for fastening the cover hood 8 at the cylinder head 2. The spring clamps 16 have an arcuate shape and are provided at their ends with mutually facing support areas 17 and 18. The support areas 17 and 18 which are formed by bent-off portions, engage in corresponding recesses 19 and 20 of the cover hood 8 and of the cylinder head 2. The mounting recesses 19 and 20 are provided along the outside of the cover hood 8 and of the cylinder head and more particularly adjacent the boundary walls 9 and 12.
The direction of action C--C (FIG. 4) of the support areas 17 and 18 of the spring clamps 16 lies on a vertical line 21 (FIG. 1) which includes a center line of the sections 10 and 11 and of the sealing member 13.
The spring clamps 16 which have a rectangular cross section whose longer side 22 extends parallel to the internal combustion engine--distance B' (FIG. 3)--, are provided on the free sides of their support areas 17 and 18 with extensions 23 and 24 (FIG. 4). These extensions 23 and 24 are bent away from the cylinder head 2 and from the cover hood 8 in such a manner that they can be engaged from behind with a tool, for example, a screwdriver for the disengagement of the spring clamps 16.
For the purpose of a simple--also uniform--positional determination of the spring clamps 16, the latter are delimited by ribs 25, 26 and 27, 28 which are formed-on at the cover hood 8, respectively, at the cylinder head 2 (FIG. 2). The contour of these ribs is so constructed that the contour of the spring clamps 16 lies inside of the contour of the ribs 25, 26 and 27, 28 (FIG. 1-distance F).
The properties of setting behavior, volume and material of the sealing member 13 and the spring force of the spring clamps 16 can be matched empirically to one another.
While I have shown and described only one embodiment in accordance with the present invention, it is understood that the same is not limited thereto, but is susceptible of numerous changes and modifications as known to those skilled in the art, and I therefore do not wish to be limited to the details shown and described herein but intend to cover all such changes and modifications as are encompassed by the scope of the appended claims.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3924597 *Mar 13, 1974Dec 9, 1975Hatz MotorenInternal combustion engine having a sound-muffling casingUS4151823 *Jul 28, 1977May 1, 1979Grosse Leland JQuick-change oil filter/reservoir system for internal combustion engineDE363657C *Jun 12, 1923Georg Bergmann Dr IngBefestigung von abnehmbaren ZylinderkoepfenDE3009302A1 *Mar 11, 1980Sep 25, 1980Denzel Kraftfahrzeug WolfgangIC engine four-valve cylinder head - has camshaft bearings on transverse walls detachable from headDE3429635A1 *Aug 11, 1984Feb 20, 1986Hengst Walter Gmbh & Co KgAir filter housingEP0070500A1 *Jul 13, 1982Jan 26, 1983Nissan Motor Co., Ltd.Rocker cover assemblyJPS5677548A * Title not availableJPS6045769A * Title not available* Cited by examinerReferenced byCiting PatentFiling datePublication dateApplicantTitleUS5096208 *May 18, 1990Mar 17, 1992Outboard Marine CorporationMotor cover sealUS5241934 *May 10, 1991Sep 7, 1993Laimboeck FranzLiquid-cooled internal combustion engineUS5452693 *Dec 9, 1994Sep 26, 1995Cummins Engine Company, Inc.Oil pan noise enclosure and attachment system for sameUS5531196 *Sep 1, 1995Jul 2, 1996Cummins Engine Company, Inc.Oil pan noise enclosure and attachment system for sameUS6543404Apr 4, 2001Apr 8, 2003Dow Global Technologies, Inc.Adhesively bonded engine intake manifold assemblyUS6739302Dec 13, 2002May 25, 2004Dow Global Technologies, Inc.Adhesively bonded engine intake manifold assemblyUS7213560Mar 9, 2004May 8, 2007Dow Global Technologies, Inc.Adhesively bonded engine intake manifold assemblyUS7316215 *Nov 21, 2005Jan 8, 2008Hayes Lemmerz International, Inc.Valve cover assembly for a vehicle engine and method for producing sameUS7360519Jun 29, 2004Apr 22, 2008Dow Global Technologies, Inc.Engine intake manifold assemblyUS7475664Apr 2, 2007Jan 13, 2009Dow Global Technologies IncAdhesively bonded engine intake manifold assemblyUS7631630Jan 7, 2008Dec 15, 2009Federal-Mogul World Wide, Inc.Vehicle engine and snap-on engine cover assembly therefor and method of assembly of the cover assembly to the engineUS7789055Mar 2, 2005Sep 7, 2010Ab SkfConnection between an elastomeric element and a further element and method for producing such connectionUS8166940Dec 29, 2008May 1, 2012Mahle International GmbhInternal combustion engine with a camshaft bearing deviceUS8251030 *Jul 23, 2009Aug 28, 2012Briggs & Stratton CorporationRocker cover systemUS20050193972 *Mar 2, 2005Sep 8, 2005Ab SkfConnection between an elastomeric element and a further element and method for producing such connectionUS20080107546 *Feb 24, 2005May 8, 2008Meinhard FalchRefrigerant CompressorUS20090169142 *Dec 29, 2008Jul 2, 2009Uwe GrassBearing deviceUS20110017166 *Jan 27, 2011Briggs & Stratton CorporationRocker cover systemDE102004010617A1 *Mar 2, 2004Sep 29, 2005Aktiebolaget SkfVerbindung zwischen einem Elastomerteil und einem Bauteil und Verfahren zum Herstellen der VerbindungDE102004010617B4 *Mar 2, 2004Apr 24, 2008Aktiebolaget SkfVerbindung zwischen einem Elastomerteil und einem Bauteil und Verfahren zum Herstellen der VerbindungWO2002057611A1 *Jan 17, 2002Jul 25, 2002Dow Global Technologies IncAdhesively bonded valve cover cylinder head assemblyWO2008014906A1 *Jul 24, 2007Feb 7, 2008Mann & Hummel GmbhSealing system between two components* Cited by examinerClassifications U.S. Classification123/195.00C, 123/198.00E, 74/606.00R, 74/608International ClassificationF02F11/00, F02F7/00Cooperative ClassificationY10T74/219, F02F7/006, Y10T74/2186, F02F11/00European ClassificationF02F7/00D, F02F11/00Legal EventsDateCodeEventDescriptionMay 29, 1986ASAssignmentOwner name: DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT PORSCHEFree format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:AMPFERER, HERBERT;REEL/FRAME:004562/0546Effective date: 19860522Jun 3, 1991FPAYFee paymentYear of fee payment: 4Jul 11, 1995REMIMaintenance fee reminder mailedDec 3, 1995LAPSLapse for failure to pay maintenance feesFeb 6, 1996FPExpired due to failure to pay maintenance feeEffective date: 19951206RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services