Piston arrangement for a percussion tool

Details Piston arrangement for a percussion tool Piston arrangement for a percussion tool

1995-08-31

1998-07-07

Denion, Thomas E.

Expansible chamber devices

With cushioning means effective over a portion only of stroke

92172, 277165, 277188R, 277188A, F01B 1102

Patent

active

057752010

ABSTRACT:
A percussion tool comprises a cylinder 3 communicated to a pressure accumulating chamber 16 storing pressurized air therein, and a piston 4 slidable in the cylinder 3 when pressurized air is introduced into the cylinder 3 from the pressure accumulating chamber 16 and pressure of the introduced air is applied on the piston 4. A circular groove 6 is recessed on a peripheral surface of the piston 4, the peripheral surface adjacently facing to an inside wall of the cylinder 3. A piston ring 10 is accommodated in the circular groove 6, so as to provide a hermetical sealing between the piston 4 and the cylinder 3. And, a ring bumper 11 made of resilient member is provided in the circular groove 6 adjacent to the piston ring 10 in a sliding direction of the piston 4.

REFERENCES:
patent: 2437814 (1948-03-01), Hallen
patent: 2747954 (1956-05-01), Damm et al.
patent: 2973978 (1961-03-01), Oppenheim
patent: 3582093 (1971-06-01), Lucien
patent: 4052112 (1977-10-01), Faber
patent: 4928577 (1990-05-01), Stoll
patent: 5113747 (1992-05-01), Pignerol

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