E - Fixed Constructions – 02 – F
Patent
E - Fixed Constructions
02
F
E02F 9/14 (2006.01) E02F 3/96 (2006.01)
Patent
CA 2386726
An excavating machine, representatively a tracked excavator has a boom stick portion on which both an excavating bucket and a hydraulic breaker are mounted for hydraulically driven pivotal movement between first and second limit positions. With the breaker in its first limit position, the bucket may be swung away from its first limit position and used independently of the breaker for digging operations. Similarly, with the bucket in its first limit position, the breaker may be swung away from its first limit position and used independently of the breaker for refusal material-breaking operations. Thus, the same excavating machine may be used for both digging and breaking operations without the previous necessity of changing out excavating apparatus on the boom stick. A specially designed electrical and hydraulic circuit is provided which permits the positional control of both the bucket and the breaker with the same control device typically used to control the pivotal orientation of an excavating bucket.
Finlayson & Singlehurst
Underwood Lowell A.
LandOfFree
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