Patent US5347448A successfully refreshed from Google Patents.
US5347448A
Expired / Lapsed
US
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Multiprocessor system for hydraulic excavator
Assignee: Volvo Construction Equipment Korea Co Ltd
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Filing: 1992-11-25
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Granted: 1994-09-13
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Expires: 2012-11-25
Abstract
Abstract A multiprocessor system for an excavator is disclosed. The multiprocessor system has a joy stick which controls each of cylinders for a bucket, a dipper, a boom, a swing and/or traveling parts of the excavator and adjusts engine, pump and hydraulic valves by using microprocessors. As a result, performance and function of the excavator are improved.
Inventors
- 👤 Sang-Yop Nam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 13:15
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/414; G05B19/4141; E; E02; E02F; E02F9/00; E02F9/20; E02F9/2025; G05B2219/00; G05B2219/30; G05B2219/35; G05B2219/35438; G05B2219/45; G05B2219/45012
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A multiprocessor system for a hydraulic excavator, comprising a main CPU module for executing an operation function of excavator control data so as to assure proper management and security of an engine; an input control means connected to the main CPU module through a main bus for processing external input signals; an engine and pump control means connected to the main CPU module through the main bus for receiving data supplied from external sensors and controlling the engine and pump; a boom position control means for positioning a boom in place and for controlling execution of an operation by a boom; a dipper position control means for executing a dipper positioning control and for controlling execution of an operation by a dipper; a bucket position control means for executing a bucket positioning control and for controlling execution of an operation by a bucket; a swing position control means for controlling operation and positioning of a swing part; and a travel position control means for controlling operation of a travel part.
Claim 2
Dependent Claim
170 words
A multiprocessor system for a hydraulic excavator, comprising a main CPU module for executing an operation function of excavator control data so as to assure proper management and security of an engine; an input control means connected to the main CPU module through a main bus for processing external input signals; an engine and pump control means connected to the main CPU module through the main bus for receiving data supplied from external sensors and controlling the engine and pump; a boom position control means for positioning a boom in place and for controlling execution of an operation by a boom; a dipper position control means for executing a dipper positioning control and for controlling execution of an operation by a dipper; a bucket position control means for executing a bucket positioning control and for controlling execution of an operation by a bucket; a swing position control means for controlling operation and positioning of a swing part; and a travel position control means for controlling operation of a travel part.
References Cited (Backward Citations)
US4035621A
Cited
US3934126A
Cited
US4377043A
Cited
US4491927A
Cited
US4688468A
Cited
US4866641A
Cited
US5088020A
Cited
US5065326A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-09-12 | 1998-03-14 | 1998-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-09-12 | 2002-03-14 | 2002-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-09-12 | 2006-03-14 | 2006-09-13 | $7700.00 | Window Closed / Lapsed |