Patent US3899986A successfully refreshed from Google Patents.
Patent US3841203A successfully refreshed from Google Patents.
US3841203A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reciprocating-piston engines and compressors
Assignee: Ricardo PLC
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Filing: 1972-05-02
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Granted: 1974-10-15
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Expires: 1992-05-02
Abstract
Abstract A reciprocating-piston engine or compressor has the bearing caps of the main bearings of its crankshaft rigidly interconnected by means of a rigid beam bolted to the bearing caps and extending along the length of the crankshaft in the crankcase, the beam serving to improve crankshaft and crankcase stiffness. The beam can be attached to the main bearing caps after they have been assembled and secured to the crankcase to locate and support the crankshaft. The beam may be formed with oil ways and may carry the oil pump of the engine/compressor lubrication system.
Inventors
- 👤 G Bruce
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 06:27
CPC Classifications
F; F01; F01M; F01M11/00; F01M11/02; F01M1/00; F01M1/02; F02; F02F; F02F7/00; F02F7/0043; F02F7/0053; F02F7/0065; F02F7/008; F16; F16C; F16C9/00; F16C9/02; F02F2007/0056; F05; F05C; F05C2201/00; F05C2201/04; F05C2201/0433; F05C2201/0436
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
136 words
A multi-cylinder reciprocating piston machine including a crankshaft supported in a crankcase of the open bottom type by means of main bearings having detachable bearing caps, said open bottom crankcase being closed below by means of a sump, said crankshaft having cranks coupled by means of connecting rods to a set of recriprocating pistons sliding in cylinders and being removably mounted in said crankcase through the open bottom thereof by removing said sump and said detachable bearing caps, said machine comprising a rigid, stiffening beam means for attentuating the vibrational noise generated during the operation of said machine, said beam means being located in the space defined by the crankcase and the sump and rigidly interconnecting said bearing caps of the main bearings secured to the bearing caps and extending along the crankshaft in the crankcase.
Claim 2
Dependent Claim
136 words
A multi-cylinder reciprocating piston machine including a crankshaft supported in a crankcase of the open bottom type by means of main bearings having detachable bearing caps, said open bottom crankcase being closed below by means of a sump, said crankshaft having cranks coupled by means of connecting rods to a set of recriprocating pistons sliding in cylinders and being removably mounted in said crankcase through the open bottom thereof by removing said sump and said detachable bearing caps, said machine comprising a rigid, stiffening beam means for attentuating the vibrational noise generated during the operation of said machine, said beam means being located in the space defined by the crankcase and the sump and rigidly interconnecting said bearing caps of the main bearings secured to the bearing caps and extending along the crankshaft in the crankcase.
Claim 3
Dependent Claim
59 words
A machine as claimed in claim 1 in which a first set of bolts secures the bearing caps to the crankcase, and in which further bolts secure the beam to the bearing caps, whereby the crankshaft can first be assembled to the crankcase in the main bearing caps whereafter the beam can be secured to the assembled bearing caps.
Claim 4
Dependent Claim
21 words
A machine as claimed in claim 2 in which dowel locating means locates the beam with respect to the bearing caps.
Claim 5
Dependent Claim
21 words
A machine as claimed in claim 2 in which tenon locating means locates the beam with respect to the bearing caps.
Claim 6
Dependent Claim
20 words
A machine as claimed in claim 1 in which the beam comprises a flat plate formed with apertures and ribs.
Claim 7
Dependent Claim
21 words
A machine as claimed in claim 1 in which the beam is formed with oil ways which carry engine lubricating oil.
Claim 8
Dependent Claim
26 words
A machine as claimed in claim 1 in which an oil pump is carried by the beam forming part of a lubrication system of the machine.
Claim 9
Dependent Claim
25 words
A machine as claimed in claim 7 in which the oil pump includes a casing which is formed as an integral part of the beam.
Claim 10
Dependent Claim
36 words
A machine as claimed in claim 1 in which the crankcase is formed with an integral skirt protruding downwardly on both sides of the bearing caps, and in which the beam is bolted to the skirt.
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) | 1977-10-14 | 1978-04-15 | 1978-10-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-14 | 1982-04-15 | 1982-10-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-14 | 1986-04-15 | 1986-10-15 | $7700.00 | Window Closed / Lapsed |