Percussion device

Details Percussion device Percussion device

1984-11-01

1986-12-23

Schran, Donald R.

Tool driving or impacting

Impacting devices

Impact transmitting anvil

173128, 173 51, 29 81D, B25D 900

Patent

active

046306870

ABSTRACT:
A pneumatic hammer comprises a cylindrical housing, in which are a free piston, an anvil, and needles the rear ends of which end in heads designed to rest against the anvil and supported by a tool holder. The anvil comprises a steel cylinder in the lateral surface of which is an annular rebate. The cylinder is surrounded by a plastics material in the rebate, the outer surface of which material forms the cylindrical sliding surface of the anvil. The volume occupied by the plastics material is approximately 50% of the total volume, such that the mass of the anvil is approximately halved.

REFERENCES:
patent: 3344868 (1967-10-01), Mikiya et al.
patent: 3618678 (1970-06-01), Smith
patent: 3680643 (1972-08-01), Cameron et al.

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