Tool driving or impacting – With indicating or signaling means
Patent
1974-11-20
1976-11-16
Gilliam, Paul R.
Tool driving or impacting
With indicating or signaling means
173131, E02D 706
Patent
active
039918335
ABSTRACT:
Apparatus is disclosed for cushioning or attenuating the highly destructive, peak impact forces which occur between an operating pile hammer ram and the pile cap or helmet at the moment of initial contact while permitting a maximum of the delivered energy to be converted into useful work in driving the pile. Such impact forces, which can physically damage the pile hammer, the helmet, the pile, or all three, are effectively and efficiently reduced by means of an energy storing, flat spring member. Said member is so arranged as to permit a determinable, relatively constant portion of the energy absorbed from the hammer blow to be stored during hammer deceleration and then be returned to the hammer ram on its retraction stroke while minimizing that portion of absorbed energy which is irrecoverably converted to heat.
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Cannaday Richard L.
Gilliam Paul R.
Grosz Alex
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