Diesel pile-driving ram

Details Diesel pile-driving ram Diesel pile-driving ram

1975-12-05

1978-02-21

Purser, Ernest R.

Tool driving or impacting

Impacting devices

Hammer head constitutes piston of drive motor

123 46H, 173133, E02D 712

Patent

active

040747760

ABSTRACT:
In a Diesel pile-driving ram comprising a combustion cylinder, a striker extending into the combustion cylinder, a piston housed in the combustion cylinder and a fuel injector for the supply of fuel between the impact surfaces of the piston and the striker, the impact surface of the striker is orientated in such a manner towards an annular precombustion chamber of a compression space provided between the piston and the striker, that the fuel atomized by impact ignites in the precombustion chamber. Said fuel, however, has too little air in said chamber in order to ignite immediately. The ignition is delayed for a moment but not too strongly because the precombustion chamber communicates with the main combustion chamber through an ample, annular passage of short length in an axial direction.

REFERENCES:
patent: 2792876 (1957-03-01), Dyer
patent: 3303892 (1967-02-01), Nishimura et al.
patent: 3679005 (1972-07-01), Inaba et al.

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