Source: http://www.google.com/patents/US5493798?dq=5579430
Timestamp: 2014-07-25 15:58:49
Document Index: 413471070

Matched Legal Cases: ['Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08', 'Application No. 08']

Patent US5493798 - For controlling a work implement of an excavating machine - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsAccording to one aspect of the present invention, a control system for automatically controlling a work implement of an excavating machine through an excavation work cycle is provided. The work implement includes a boom, stick and bucket, each being controllably actuated by at least one respective hydraulic...http://www.google.com/patents/US5493798?utm_source=gb-gplus-sharePatent US5493798 - For controlling a work implement of an excavating machineAdvanced Patent SearchPublication numberUS5493798 APublication typeGrantApplication numberUS 08/260,427Publication dateFeb 27, 1996Filing dateJun 15, 1994Priority dateJun 15, 1994Fee statusPaidAlso published asDE19521722A1, DE19521722B4Publication number08260427, 260427, US 5493798 A, US 5493798A, US-A-5493798, US5493798 A, US5493798AInventorsDavid J. Rocke, Lonnie J. Devier, Dale B. HergetOriginal AssigneeCaterpillar Inc.Export CitationBiBTeX, EndNote, RefManPatent Citations (18), Non-Patent Citations (32), Referenced by (60), Classifications (9), Legal Events (5) External Links: USPTO, USPTO Assignment, EspacenetFor controlling a work implement of an excavating machineUS 5493798 AAbstract According to one aspect of the present invention, a control system for automatically controlling a work implement of an excavating machine through an excavation work cycle is provided. The work implement includes a boom, stick and bucket, each being controllably actuated by at least one respective hydraulic cylinder, the hydraulic cylinders containing pressurized hydraulic fluid. The control system includes an operator control element adapted to produce an operator control signal indicative of a desired velocity of one of the hydraulic cylinders. An electrohydraulic valve actuates predetermined ones of the hydraulic cylinders to perform an excavation work cycle in response to the control signal. A sensor produces signals indicative of the forces associated with at least one of the hydraulic cylinders. A logic device receives the operator control signals, compares the control signal magnitudes to predetermined control signal magnitudes, and determines operating parameters associated with predetermined portions of the work cycle. Finally, the logic device receives the operator control signals and force signals, and responsively produces command signals to the electrohydraulic valve to automatically perform subsequent work cycles in accordance with the determined operating parameters.
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1994ASAssignmentOwner name: CATERPILLAR INC., ILLINOISFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:ROCKE, DAVID J.;DEVIER, LONNIE J.;HERGET, DALE B.;REEL/FRAME:007044/0736;SIGNING DATES FROM 19940524 TO 19940531RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google