The Fluid Tappet - A New Concept in High Energy Impact Breaking 780452
A new high energy impact hammer incorporating a fluid tappet and a high velocity piston is described which offers improved productivity, safety and reliability in rock excavation, structure demolition and secondary boulder breaking. Two models of this hammer are discussed, the 411 with a blow energy of 6000 ft. lb. (685 kg.m.) and the 514 with 20,000 ft. lb. (2275 kg.m.). The attachment of these new tools to a wide range of excavators and special machines is shown. The process of impact breaking is analyzed and several examples of effective use of these hammers are presented.
Citation: Etherington, M. and Deering, D., "The Fluid Tappet - A New Concept in High Energy Impact Breaking," SAE Technical Paper 780452, 1978, https://doi.org/10.4271/780452. Download Citation
Author(s):
Murray Etherington, David Deering
Affiliated:
Hard Rock Mining Div., Joy Manufacturing Co.
Pages: 16
Event:
29th Annual Earthmoving Industry Conference
ISSN:
0148-7191
e-ISSN:
2688-3627
Related Topics:
Pistons
Productivity
Soils
Tools and equipment
Reliability
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