US7070526B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Accessory drive for driving a balance shaft
Assignee: Perkins Engines Co Ltd
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Filing: 2002-03-18
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Granted: 2006-07-04
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Expires: 2022-03-18
Abstract
Abstract An engine accessory drive that has a primary drive driveable by a crankshaft of the engine is disclosed. The accessory drive includes a rotational member mounted on a drive shaft and driveable by the primary drive, the drive shaft having an axis of rotation offset from the axis of rotation of the crankshaft. The accessory drive further includes a secondary drive having a flexible continuous secondary drive member external of the engine and driveable by the rotational member, and at least one engine accessory driveable by the secondary drive. The at least one engine accessory includes at least a balance shaft.
Inventors
- 👤 Howard J. Lawrence
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:28
CPC Classifications
F; F02; F02B; F02B67/00; F01; F01L; F01L1/00; F01L1/02; F01L1/024; F16; F16F; F16F15/00; F16F15/22; F16F15/26; F16F15/264
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
88 words
An engine accessory drive comprising: a primary drive driveable by a crankshaft of the engine, a rotational member mounted on a drive shaft driveable by the primary drive, the drive shaft having an axis of rotation offset from the axis of rotation of the crankshaft, a second drive including a flexible, continuous secondary drive member external of the engine and driveable by the rotational member, and at least one engine accessory driveable by the secondary drive, the at least one engine accessory including at least a balance shaft.
Claim 2
Dependent Claim
88 words
An engine accessory drive comprising: a primary drive driveable by a crankshaft of the engine, a rotational member mounted on a drive shaft driveable by the primary drive, the drive shaft having an axis of rotation offset from the axis of rotation of the crankshaft, a second drive including a flexible, continuous secondary drive member external of the engine and driveable by the rotational member, and at least one engine accessory driveable by the secondary drive, the at least one engine accessory including at least a balance shaft.
Claim 3
Dependent Claim
29 words
An engine accessory drive as claimed in claim 1 wherein the at least one engine accessory includes first and second balance shafts arranged for contrarotation at twice engine speed.
Claim 4
Dependent Claim
19 words
An engine accessory drive as claimed in claim 2 wherein the secondary drive member includes a synchronous drive belt.
Claim 5
Dependent Claim
20 words
An engine accessory drive as claimed in claim 2 wherein the drive shaft is rotatable at engine speed or greater.
Claim 6
Dependent Claim
26 words
An engine accessory drive as claimed in claim 2 wherein the primary drive includes one of a belt drive, a chain drive, and a gear drive.
Claim 7
Dependent Claim
19 words
An engine accessory drive as claimed in claim 1 wherein the secondary drive member includes a synchronous drive belt.
Claim 8
Dependent Claim
20 words
An engine accessory drive as claimed in claim 1 wherein the drive shaft is rotatable at engine speed or greater.
Claim 9
Dependent Claim
25 words
An engine accessory drive as claimed claim 1 wherein the primary drive includes one of a belt drive, a chain drive, and a gear drive.
Claim 10
Dependent Claim
41 words
An engine accessory drive as claimed in claim 1 wherein the at least one engine accessory includes first and second balance shafts arranged for contrarotation at twice engine speed, and wherein the drive shaft is rotatable at engine speed or greater.
Claim 11
Dependent Claim
58 words
An engine accessory drive as claimed in claim 1 wherein the at least one engine accessory includes first and second balance shafts arranged for contrarotation at twice engine speed, wherein the drive shaft is rotatable at engine speed or greater, and wherein the primary drive includes one of a belt drive, a chain drive, and a gear drive.
Claim 12
Dependent Claim
80 words
An engine comprising: a crankshaft, a primary drive driveable by the crankshaft, a rotational member mounted on a drive shaft driveable by the primary drive, the drive shaft having an axis of rotation offset from the axis of rotation of the crankshaft, a second drive including a flexible, continuous secondary drive member driveable by the rotational member, and at least one engine accessory driveable by the secondary drive, the at least one engine accessory including at least a balance shaft.
Claim 13
Dependent Claim
80 words
An engine comprising: a crankshaft, a primary drive driveable by the crankshaft, a rotational member mounted on a drive shaft driveable by the primary drive, the drive shaft having an axis of rotation offset from the axis of rotation of the crankshaft, a second drive including a flexible, continuous secondary drive member driveable by the rotational member, and at least one engine accessory driveable by the secondary drive, the at least one engine accessory including at least a balance shaft.
Claim 14
Dependent Claim
27 words
An engine as claimed in claim 11 wherein the at least one engine accessory includes first and second balance shafts arranged for contra-rotation at twice engine speed.
Claim 15
Dependent Claim
20 words
An engine accessory drive as claimed in claim 11 wherein the drive shaft is rotatable at engine speed or greater.
Claim 16
Dependent Claim
26 words
An engine accessory drive as claimed in claim 11 wherein the primary drive includes one of a belt drive, a chain drive, and a gear drive.
Claim 17
Independent Claim
79 words
A method of driving an engine accessory comprising the steps of: providing an engine with a crankshaft, driving a primary drive from the crankshaft, driving a drive shaft from the primary drive, the drive shaft having a rotational member mounted thereon, driving a second drive including a flexible, continuous secondary drive member from the rotational member, and driving at least one engine accessory from the secondary drive, the at least one engine accessory including at least a balance shaft.
Claim 18
Independent Claim
79 words
A method of driving an engine accessory comprising the steps of: providing an engine with a crankshaft, driving a primary drive from the crankshaft, driving a drive shaft from the primary drive, the drive shaft having a rotational member mounted thereon, driving a second drive including a flexible, continuous secondary drive member from the rotational member, and driving at least one engine accessory from the secondary drive, the at least one engine accessory including at least a balance shaft.
Claim 19
Dependent Claim
30 words
A method as claimed in claim 15 , wherein the drive shaft rotates at a speed of rotation greater than or equal to the speed of rotation of the crankshaft.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2009-07-03 | 2010-01-02 | 2010-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2013-07-03 | 2014-01-02 | 2014-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2017-07-03 | 2018-01-02 | 2018-07-04 | $7700.00 | Window Closed / Lapsed |