Impact device with linear air spring

Details Impact device with linear air spring Impact device with linear air spring

1977-01-24

1978-07-11

Hafer, Robert A.

Tool driving or impacting

Impacting devices

Spring bodily cyclically moved with hammer head

173122, B25D 900

Patent

active

040995801

ABSTRACT:
An impact device incorporating an improved air spring coupler in the form of a novel cylinder-piston is disclosed, in which the air spring is linear, i.e., the air spring stiffness is substantially constant over the operating range of the air spring displacement. Selected relations between piston area, ram mass, cylinder volume and equivalent length, crank radius, frequency of impacts and power available in the impact device are disclosed for which the improvement of such linear air spring stiffness is obtained form preferred embodiments.

REFERENCES:
patent: 1191948 (1916-07-01), Coates
patent: 2447886 (1948-08-01), Worth
patent: 3559751 (1971-02-01), Yamada
patent: 3688848 (1972-09-01), Vick et al.
patent: 3741559 (1973-06-01), Ross

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