FIELD: mechanical engineering. SUBSTANCE: when a force is eliminated from hummer 18, slide valve 16 returns to the initial position under the action of spring 17. As a result supplying passageway 14 is shut off. Piston-hummer 4 returns to the initial position under the action of spring 6. In so doing the air flows to idle chamber 20 from working stroke chamber 19 through flats 5 on piston-hummer 4. Idle chamber 20 is not evacuated and, hence, the air sucking is excluded. EFFECT: enhanced reliability. 2 dwg
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Authors
Dates
1996-11-27—Published
1989-09-20—Filed