Patent US3568649A successfully refreshed from Google Patents.
US3568649A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Internal combustion engine structure
Assignee: ARCO CORP
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Filing: 1968-10-15
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Granted: 1971-03-09
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Expires: 1988-10-15
Abstract
Abstract The disclosure illustrates an opposed multicylinder internal combustion engine suitable for aircraft use. The engine is fabricated from a pair of matched crankcase halves which enable die casting for limited production. The matched crankcase halves and rows of cylinder barrels and cylinder heads on opposed sides are secured by bolts which extend the width of the engine. The crankcase halves are mounted together at a series of ribs symmetrically positioned with respect to the midpoint of the crankcase halves. The cylinder barrels are mounted on pads offset from the midpoint so that the opposed barrels are in a staggered relationship on the assembled engine.
Inventors
- 👤 Richard H Syson
- 👤 John W Eckert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:41
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/24; F02B75/243; F01; F01B; F01B1/00; F01B1/12; F02F; F02F7/00; F02F7/0002; F02F7/0009; F05; F05C; F05C2201/00; F05C2201/02; F05C2201/021
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
217 words
A crankcase assembly for an internal combustion engine having a row of generally opposed cylinders extending from said crankcase assembly and having an output gear box at one end and an accessory gear box at the opposite end of said crankcase assembly, said crankcase assembly comprising: a pair of matched elongated housings having an opposed open inner side and an outer facing side; means on the opposed open side of said housings for securing said housings to one another, said securing means being symmetrical about a normal plane at the midpoint of the longitudinal axis of said housing; means on the outer facing side of said housing for mounting said row of cylinders, said cylinder mounting means being offset relative to said normal plane so that when said housings are secured to one another said opposed cylinders are mountable thereon in staggered relationship; end walls for said housings extending from said inner side and terminating in a plane extending through the longitudinal juncture between said housings; and means positioned on said end walls for mounting said output and accessory gear box, said mounting means on either end being equidistant from said longitudinal plane so that said accessory gear box and said output gear box are adapted to be interchangeably mounted on the end walls of said housings.
Claim 2
Dependent Claim
217 words
A crankcase assembly for an internal combustion engine having a row of generally opposed cylinders extending from said crankcase assembly and having an output gear box at one end and an accessory gear box at the opposite end of said crankcase assembly, said crankcase assembly comprising: a pair of matched elongated housings having an opposed open inner side and an outer facing side; means on the opposed open side of said housings for securing said housings to one another, said securing means being symmetrical about a normal plane at the midpoint of the longitudinal axis of said housing; means on the outer facing side of said housing for mounting said row of cylinders, said cylinder mounting means being offset relative to said normal plane so that when said housings are secured to one another said opposed cylinders are mountable thereon in staggered relationship; end walls for said housings extending from said inner side and terminating in a plane extending through the longitudinal juncture between said housings; and means positioned on said end walls for mounting said output and accessory gear box, said mounting means on either end being equidistant from said longitudinal plane so that said accessory gear box and said output gear box are adapted to be interchangeably mounted on the end walls of said housings.
Claim 3
Dependent Claim
119 words
A crankcase assembly as in claim 1 wherein said crankcase provides a housing for a crankshaft journaled therein and having throws in line with the midpoint of each of said cylinder mounting means, and wherein said housing securing means include: a plurality of ribs extending from the inner side of said housings toward said opposed inner sidE, said ribs having an arcuate recess therein for journaling one side of said crankshaft; and said ribs being positioned symmetrical about said normal plane and positioned in line with both ends of said cylinder mounting means so that when the housings are secured to one another the ribs extending from said inner sides cooperate to journal said crankshaft in between said throws.
Claim 4
Dependent Claim
61 words
A crankcase assembly as in claim 1 for use with an engine including an oil sump chamber and wherein: said housings have an open bottom side for receiving said oil sump; and said crankcase assembly further comprises means on the bottom side of said housings for mounting said oil sump casing, said mounting means being positioned symmetrical about said normal plane.
Claim 5
Dependent Claim
62 words
A crankcase assembly as in claim 1 wherein said crankcase assembly is adapted to provide a support for said engine, and wherein said crankcase assembly further comprises: mounting pads positioned adjacent opposite ends of said matched housings on the outer facing sides thereof for securing said engine to a support member; and said mounting means being symmetrical relative to said normal plane.
Claim 6
Dependent Claim
87 words
A crankcase assembly as in claim 1 wherein said housing securing means and said cylinder mounting means further includes: passageway means extending through said housings normal to the longitudinal axis thereof and positioned so that a single passageway means extends through said casings adjacent one side of a cylinder on one casing and the other side of a cylinder on the opposite casing; and bolt means extending through said passageway means for connecting said rows of cylinders to said casings and connecting said casings to one another.
Claim 7
Dependent Claim
77 words
A crankcase assembly as in claim 5 in combination with rows of cylinder assemblies extending from said cylinder mounting means, said cylinder assemblies having intermediate barrel portions and head portions at the outer extremities thereof, and wherein: said bolt means extends through the housings to an outer facing side of the head portion of a cylinder assembly on the opposite side of the engine axis; and whereby said housings and said cylinder barrels are secured in compression.
Claim 8
Dependent Claim
42 words
Apparatus as in claim 6 wherein: said bolt means further comprise an expanded portion at the midpoint thereof to line up opposing passageway means through which the bolt means extends; and whereby said bolt means key said crankcase halves with one another.
Claim 9
Dependent Claim
119 words
A crankcase as in claim 2 wherein said crankcase assembly further comprises means for providing a flow path for lubricating fluid to said journaling means, said flow path means comprising: a tube extending through openings in the plurality of ribs, said tube being positioned generally parallel to the longitudinal axis of said housings and to one side of said arcuate recesses; passageway means extending from the arcuate recess of said inner ribs through said inner ribs to the interior of said tubular member, said tubular member having apertures communicating with each of said passageway means; and said tubular member having the same coefficient of expansion as said casings for preventing leaks of the junction therebetween over substantial temperature changes.
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) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |