US5010859A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chain cover for V-type engine
Assignee: Nissan Motor Co Ltd
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Filing: 1990-03-14
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Granted: 1991-04-30
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Expires: 2010-03-14
Abstract
Abstract A V-type engine includes first and second camshafts rotatably mounted to cylinder heads, respectively. A first chain drivingly interconnects a crankshaft and the first camshaft, whereas a second chain drivingly interconnects the crankshaft and the second camshaft. First and second tensioners provide the tensions to the first and second chains, respectively. For concealing the first and second chains, the engine has a cover formed with two openings positioned in accordance with the first and second tensioners.
Inventors
- 👤 Etsuo Ogami
- 👤 Yoshio Iwasa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 18:04
CPC Classifications
F; F02; F02B; F02B75/00; F02B75/16; F02B75/18; F02B75/22; F01; F01L; F01L1/00; F01L1/02; F01L1/022; F01L1/024; F02F; F02F7/00; F02F7/0065; F02F7/0068; F01L1/04; F01L1/047; F01L1/053; F01L2001/0537; F02B2275/00; F02B2275/08; F02B2275/18; F02B67/00; F02B67/04; F02B67/06; F16; F16H; F16H7/00; F16H7/08
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
143 words
In a V-type engine having a cylinder block bifurcated to form two cylinder banks, a cylinder head mounted on each of the cylinder banks, and a crankshaft, comprising: a first camshaft rotatably mounted to one of the cylinder heads; a second camshaft rotatably mounted to the other of the cylinder heads; a first chain drivingly interconnecting the crankshaft and said first camshaft; a second chain drivingly interconnecting the crankshaft and said second camshaft; first and second tensioners so constructed and arranged as to provide the tensions to said first and second chains, respectively; a first cover so constructed and arranged as to conceal said first and second chains, said first cover being formed with two openings positioned adjacent said first and second tensioners; and a pair of second covers so constructed and arranged as to conceal said two openings in a seal-tight manner.
Claim 2
Dependent Claim
143 words
In a V-type engine having a cylinder block bifurcated to form two cylinder banks, a cylinder head mounted on each of the cylinder banks, and a crankshaft, comprising: a first camshaft rotatably mounted to one of the cylinder heads; a second camshaft rotatably mounted to the other of the cylinder heads; a first chain drivingly interconnecting the crankshaft and said first camshaft; a second chain drivingly interconnecting the crankshaft and said second camshaft; first and second tensioners so constructed and arranged as to provide the tensions to said first and second chains, respectively; a first cover so constructed and arranged as to conceal said first and second chains, said first cover being formed with two openings positioned adjacent said first and second tensioners; and a pair of second covers so constructed and arranged as to conceal said two openings in a seal-tight manner.
Claim 3
Dependent Claim
18 words
A V-type engine as claimed in claim 1, wherein said openings are larger in size than said tensioners.
Claim 4
Dependent Claim
227 words
In a V-type engine having a cylinder block bifurcated to form two cylinder banks, a cylinder head mounted on each of the cylinder banks, and a crankshaft: a first pair of camshafts rotatably mounted to one of the cylinder banks; a second pair of camshafts rotatably mounted to the other of the cylinder banks; a first idler gear rotatably mounted to one of the cylinder banks; a second idler gear rotatably mounted to other of the cylinder banks; means for drivingly interconnecting one of said first and second pairs of camshafts and one of said first and second idler gears; means for drivingly interconnecting the other of said first and second pairs of camshafts and the other of said first and second idler gears; a first chain drivingly interconnecting the crankshaft and one of said first and second idler gears; a second chain drivingly interconnecting the crankshaft and the other of said first and second idler gears; first and second tensions so constructed and arranged as to provide the tensions to said first and second chains, respectively; a first cover so constructed and arranged as to conceal said first and second chains, said first cover being formed with two openings positioned adjacent said first and second tensioners; and a pair of second covers so constructed and arranged as to conceal said two openings in a seal-tight manner.
Claim 5
Dependent Claim
227 words
In a V-type engine having a cylinder block bifurcated to form two cylinder banks, a cylinder head mounted on each of the cylinder banks, and a crankshaft: a first pair of camshafts rotatably mounted to one of the cylinder banks; a second pair of camshafts rotatably mounted to the other of the cylinder banks; a first idler gear rotatably mounted to one of the cylinder banks; a second idler gear rotatably mounted to other of the cylinder banks; means for drivingly interconnecting one of said first and second pairs of camshafts and one of said first and second idler gears; means for drivingly interconnecting the other of said first and second pairs of camshafts and the other of said first and second idler gears; a first chain drivingly interconnecting the crankshaft and one of said first and second idler gears; a second chain drivingly interconnecting the crankshaft and the other of said first and second idler gears; first and second tensions so constructed and arranged as to provide the tensions to said first and second chains, respectively; a first cover so constructed and arranged as to conceal said first and second chains, said first cover being formed with two openings positioned adjacent said first and second tensioners; and a pair of second covers so constructed and arranged as to conceal said two openings in a seal-tight manner.
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) | 1994-04-29 | 1994-10-29 | 1995-04-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1998-04-29 | 1998-10-29 | 1999-04-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2002-04-29 | 2002-10-29 | 2003-04-30 | $7700.00 | Window Closed / Lapsed |