Patent US4390255A successfully refreshed from Google Patents.
US3769953A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crank case for an internal combustion engine or the like
Assignee: SOC D ETUDES MACHINES THERMIQUES FR
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Filing: 1971-05-26
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Granted: 1973-11-06
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Expires: 1991-05-26
Abstract
Abstract A crank-case for an internal combustion engine comprising a flat supporting structure extending throughout the length of the crank-case and consisting of a single supporting plate consisting of one single for example integrally cast or rolled part forming a single continuous main beam made in one piece and receiving the fastening ends of the cylinder tie-bolts whereas the transverse partitions and longitudinal walls consist each one of a bottom portion and of a top portion in extension of one another and welded to said supporting plate above and below same, respectively, while being separated therefrom.
Inventors
- 👤 K Kuhn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 00:30
CPC Classifications
F; F02; F02F; F02F7/00; F02F7/0021; F02F7/0034; F02F7/0002; F02F7/0012
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
205 words
A crank-case for an internal combustion engine with at least one longitudinal row of built-in cylinders, held by tie-bolts, said crank-case forming a welded hollow box consisting of onepiece elements and of metal sheets and comprising a substantially flat supporting structure generally directed horizontally and extending substantially throughout the length of the crank-case and formed with openings accommodating the lower portions of the cylinder liners, vertical, spaced, intermediate and end transverse partitions forming supporting webs for the crank-shaft bearings, two longitudinal at least approximatively vertical opposite walls forming the side faces and a tablet-like upper plate with parallel openings arranged in coaxial relation to those of said supporting plate for accommodating the cylinder water jackets, wherein the improvement consists in that said supporting structure is a single supporting plate consisting of one single integral part forming a single continuous main beam made in one piece and receiving the fastening ends of the cylinder tie-bolts whereas the transverse partitions and longitudinal walls consist each one of a bottom portion and of a top portion substantially in extension of one another and which are welded to said supporting plate above and below same, respectively, while being separated therefrom, said tablet-like plate being welded onto said top portions.
Claim 2
Dependent Claim
205 words
A crank-case for an internal combustion engine with at least one longitudinal row of built-in cylinders, held by tie-bolts, said crank-case forming a welded hollow box consisting of onepiece elements and of metal sheets and comprising a substantially flat supporting structure generally directed horizontally and extending substantially throughout the length of the crank-case and formed with openings accommodating the lower portions of the cylinder liners, vertical, spaced, intermediate and end transverse partitions forming supporting webs for the crank-shaft bearings, two longitudinal at least approximatively vertical opposite walls forming the side faces and a tablet-like upper plate with parallel openings arranged in coaxial relation to those of said supporting plate for accommodating the cylinder water jackets, wherein the improvement consists in that said supporting structure is a single supporting plate consisting of one single integral part forming a single continuous main beam made in one piece and receiving the fastening ends of the cylinder tie-bolts whereas the transverse partitions and longitudinal walls consist each one of a bottom portion and of a top portion substantially in extension of one another and which are welded to said supporting plate above and below same, respectively, while being separated therefrom, said tablet-like plate being welded onto said top portions.
Claim 3
Dependent Claim
102 words
A crank-case according to claim 1, with two rows of V-shaped cylinders with a roof-shaped supporting plate forming an uPward projecting dihedron with a central longitudinal crest edge and with a central longitudinal partition welded between said supporting plate and said tablet-like upper plate above said crest edge, wherein said longitudinal partition consists of one single continuous metal sheet whereas the top portion of each aforesaid transverse partition consists of two bracing elements fillet welded, respectively, at a substantially right angle onto said longitudinal partition on each side thereof and onto each aforesaid side wall between the latter and said longitudinal partition.
Claim 4
Dependent Claim
39 words
A crank-case according to claim 1, wherein said supporting plate comprises on each one of its respective upper and lower opposite faces at least approximatively vertical projecting ribs made integral for butt-welded assembly edge-to-edge with said partitions and walls.
Claim 5
Dependent Claim
47 words
A crank-case according to claim 1, with removable lower crank-shaft bearing body portions detachable from below and connectable with yoke-like bearing cages, respectively, integral with respective transverse partitions, wherein said lower portion of each transverse partition is made from one single piece integral with its associated yoke.
Claim 6
Dependent Claim
52 words
A crank-case according to claim 1, for two rows of V-shaped cylinders longitudinally offset from one row to the other, wherein the web of at least each aforesaid intermediate transverse partition is substantially flat and arranged obliquely with respect to the plane of the associated bearing between two adjacent transverse cylinder walls.
Claim 7
Dependent Claim
55 words
A crank-case according to claim 1, at least the intermediate transverse partitions of which comprise each one underneath said supporting plate an inverted U-shaped recess opening downwards, comprising a pair of longitudinal side base flanges welded beneath said longitudinal side walls and beneath said partitions, respectively, on each side for attachment onto a base plate.
Claim 8
Dependent Claim
18 words
A crank-case according to claim 1, wherein said supporting plate consists of several elements directly welded together edge-to-edge.
Claim 9
Dependent Claim
45 words
A crank-case according to claim 7, wherein said supporting plate consists of at least two elements juxtaposed in aligned relationship in the longitudinal direction and connected together by a straight transverse weld extending substantially at right angles to the longitudinal direction of said supporting plate.
Claim 10
Dependent Claim
66 words
A crank-case according to claim 8, for an engine with two rows of mutually offset V-shaped cylinders with a roof-shaped supporting plate forming an upward projecting dihedron with a longitudinal central crest edge, wherein each aforesaid transverse weld extends for example in the middle between the parallel transverse diametral planes of two aforesaid transversely corresponding openings which are longitudinally offset mutually with respect to each other.
Claim 11
Dependent Claim
61 words
A crank-case according to claim 8, for an engine with two rows of V-shaped cylinders with axes transversely aligned by pairs from one row to the other and having a roof-shaped supporting plate forming an upward projecting dihedron with a longitudinal central crest edge, wherein each weld seam extends along a diametral transverse plane common to a transverse pair of cylinders.
Claim 12
Dependent Claim
30 words
A crank-case according to claim 7, wherein said supporting plate consists of at least two elements transversely put together laterally and connected together by a substantially straight longitudinal weld seam.
Claim 13
Dependent Claim
49 words
A crank-case according to claim 11, for an engine with two rows of mutually offset V-shaped cylinders with a roof-shaped supporting plate forming an upward projecting dihedron with a longitudinal central crest edge, wherein said supporting plate consists of two elements welded to each other along said longitudinal edge.
Claim 14
Dependent Claim
126 words
A crank-case for an internal combustion engine with two longitudinal rows of mutually offset built-in cylinders and comprising a longitudinal supporting plate made from rolled sheet metal stock, extending substantially continuously the full length of said crank-case with a roof-like configuration forming an upward projecting dihedron with a longitudinal crest edge for accomodating the lower portion of the cylinder liners within corresponding openings and for receiving the fastening ends of the cylinder tie-bolts, and a tablet-like upper plate with parallel openings arranged in coaxial relation to those of said longitudinal supporting plate for accomodating the cylinder water jackets, wherein said supporting plate consists of at least one prefabricated separate element made from a a metal sheet bent along said longitudinal edge and welded to said crank-case.
Claim 15
Dependent Claim
126 words
A crank-case for an internal combustion engine with two longitudinal rows of mutually offset built-in cylinders and comprising a longitudinal supporting plate made from rolled sheet metal stock, extending substantially continuously the full length of said crank-case with a roof-like configuration forming an upward projecting dihedron with a longitudinal crest edge for accomodating the lower portion of the cylinder liners within corresponding openings and for receiving the fastening ends of the cylinder tie-bolts, and a tablet-like upper plate with parallel openings arranged in coaxial relation to those of said longitudinal supporting plate for accomodating the cylinder water jackets, wherein said supporting plate consists of at least one prefabricated separate element made from a a metal sheet bent along said longitudinal edge and welded to said crank-case.
Claim 16
Dependent Claim
27 words
A crank-case according to claim 13, wherein said supporting plate consists of several aforesaid elements made from a bent metal sheet and transversely welded to each other.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-05 | 1977-05-07 | 1977-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-05 | 1981-05-07 | 1981-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-05 | 1985-05-07 | 1985-11-06 | $7700.00 | Window Closed / Lapsed |