Patent US5112281A successfully refreshed from Google Patents.
US5112281A
Expired / Lapsed
US
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Driving system for auxiliaries of engine and method for adjusting tension of belt for driving auxiliaries
Assignee: Mazda Motor Corp
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Filing: 1991-02-27
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Granted: 1992-05-12
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Expires: 2011-02-27
Abstract
Abstract Plural auxiliaries are independently driven by a belt ot suppress an increase in the number of parts and simplify the structure. A cam shaft has first and second driving pulleys disposed in parallel to each other. A first auxiliary having a smaller load against the engine is movably mounted to the engine and it has a first following pulley mounted to its operating shaft which is coaxially and rotatably mounted with an idle pulley. On the other hand, a second auxiliary having a larger load against the engine is fixed to the engine. To the engine is movably mounted a tension pulley. A first belt for driving the first auxiliary is wound around the first following pulley, the first driving pulley and a tension pulley, while a second belt for driving the second auxiliary is wound around the second driving pulley and the idle pulley. The tension of the first belt is adjusted by transferring the tension pulley, while the tension of the second belt is adjusted by transferring the first auxiliary.
Inventors
- 👤 Norio Minato
- 👤 Makoto Kishida
- 👤 Yumi Yamada
- 👤 Izumi Watanabe
- 👤 Kiyomi Kimura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:07
CPC Classifications
F; F02; F02B; F02B67/00; F02B67/04; F02B67/06; F16; F16H; F16H7/00; F16H7/08; F16H7/10; F16H7/12; F16H7/1254; F16H7/1263; F02B2275/00; F02B2275/06; F16H2007/0889; F16H2007/0893
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
121 words
A driving system for driving auxiliaries comprising: a first driving pulley and a second driving pulley disposed parallel to a driving shaft; a first auxiliary mounted movable to an engine body; a first following pulley fixed to an operating shaft of said first auxiliary; an idle pulley disposed rotatably and coaxially with said operating shaft thereof; a second auxiliary fixed to the engine body; a second following pulley fixed to an operating shaft of said second auxiliary; a tension pulley mounted movably to the engine body; a first belt wound around said first driving pulley, said first following pulley and said tension pulley; and a second belt wound around said second driving pulley, said idle pulley and said second following pulley.
Claim 2
Dependent Claim
121 words
A driving system for driving auxiliaries comprising: a first driving pulley and a second driving pulley disposed parallel to a driving shaft; a first auxiliary mounted movable to an engine body; a first following pulley fixed to an operating shaft of said first auxiliary; an idle pulley disposed rotatably and coaxially with said operating shaft thereof; a second auxiliary fixed to the engine body; a second following pulley fixed to an operating shaft of said second auxiliary; a tension pulley mounted movably to the engine body; a first belt wound around said first driving pulley, said first following pulley and said tension pulley; and a second belt wound around said second driving pulley, said idle pulley and said second following pulley.
Claim 3
Dependent Claim
39 words
A driving system as claimed in claim 1, wherein: said first auxiliary and said second auxiliary have relatively different load against the engine; and said first auxiliary has a smaller load and said second auxiliary has a larger load.
Claim 4
Dependent Claim
25 words
A driving system as claimed in claim 1, wherein said idle pulley is mounted to said operating shaft of said first auxiliary through a bearing.
Claim 5
Dependent Claim
25 words
A driving system as claimed in claim 1, wherein said idle pulley is mounted to a main body of said first auxiliary through a bearing.
Claim 6
Dependent Claim
25 words
A driving system as claimed in claim 1, wherein said idle pulley is disposed within or inside a locus of travel of said second belt.
Claim 7
Dependent Claim
23 words
A driving system as claimed in claim 1, wherein said first following pulley has a size in diameter identical to said idle pulley.
Claim 8
Dependent Claim
80 words
A driving system as claimed in claim 1, wherein: said first driving pulley is disposed at a top portion of said first driving shaft and said second driving pulley is disposed on the side of an engine body; said idle pulley is disposed in a position closer to the side of the engine body than said first following pulley; and said second belt is disposed in a position closer to the side of the engine body than said first belt.
Claim 9
Dependent Claim
25 words
A driving system as claimed in claim 7, wherein: said first belt covers a mounting portion for mounting said first auxiliary to the engine body.
Claim 10
Dependent Claim
39 words
A driving system as claimed in claim 8, wherein: said first auxiliary and said second auxiliary have relatively different load against the engine; and said first auxiliary has a smaller load and said second auxiliary has a larger load.
Claim 11
Dependent Claim
23 words
A driving system as claimed in claim 9, wherein said first following pulley has a size in diameter identical to said idle pulley.
Claim 12
Dependent Claim
25 words
A driving system as claimed in claim 10, wherein said idle pulley is mounted to said operating shaft of said first auxiliary through a bearing.
Claim 13
Dependent Claim
23 words
A driving system as claimed in claim 10, wherein said tension pulley is disposed inside a locus of travel of said second belt.
Claim 14
Dependent Claim
27 words
A driving system as claimed in claim 10, wherein: said first auxiliary is a vacuum pump; and said second auxiliary is an oil pump for power steering.
Claim 15
Dependent Claim
57 words
A driving system as claimed in claim 12, wherein: said tension pulley has an adjusting screw for transferring a shaft to which said tension pulley is mounted, in a direction in parallel to said tension pulley; and said adjusting screw is disposed in a position in which said adjusting screw does not interfere with said second belt.
Claim 16
Dependent Claim
16 words
A driving system as claimed in claim 12, wherein said driving shaft is a cam shaft.
Claim 17
Independent Claim
158 words
A method for adjusting tension of a belt in a driving system for driving auxiliaries having: a first driving pulley and a second driving pulley disposed parallel to a driving shaft; a first auxiliary mounted movable to an engine body; a first following pulley fixed to an operating shaft of said first auxiliary; an idle pulley disposed rotatably and coaxially with said operating shaft thereof; a second auxiliary fixed to the engine body; a second following pulley fixed to an operating shaft of said second auxiliary; a tension pulley mounted movably to the engine body; a first belt wound around said first driving pulley, said first following pulley and said tension pulley; and a second belt wound around said second driving pulley, said idle pulley and said second following pulley; comprising: step of adjusting tension of said first belt by displacing said first auxiliary; and step of adjusting tension of said second belt by displacing said tension pulley.
Claim 18
Independent Claim
158 words
A method for adjusting tension of a belt in a driving system for driving auxiliaries having: a first driving pulley and a second driving pulley disposed parallel to a driving shaft; a first auxiliary mounted movable to an engine body; a first following pulley fixed to an operating shaft of said first auxiliary; an idle pulley disposed rotatably and coaxially with said operating shaft thereof; a second auxiliary fixed to the engine body; a second following pulley fixed to an operating shaft of said second auxiliary; a tension pulley mounted movably to the engine body; a first belt wound around said first driving pulley, said first following pulley and said tension pulley; and a second belt wound around said second driving pulley, said idle pulley and said second following pulley; comprising: step of adjusting tension of said first belt by displacing said first auxiliary; and step of adjusting tension of said second belt by displacing said tension pulley.
References Cited (Backward Citations)
US3071980A
Cited
US4966571A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-05-12 | 1995-11-11 | 1996-05-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-05-12 | 1999-11-11 | 2000-05-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-05-12 | 2003-11-11 | 2004-05-12 | $7700.00 | Window Closed / Lapsed |