Tids-styrekreds for phneumatisk drivbare indretninger

摘要

A timing control circuit for a fluid pressure operable device (12) such as a strapping tool, is manually actuable to provide fluid flow to a reservoir (90) through a fluid-flow rate-controlling valve (80) from a supply (14). A line-pressure-operable, normally-open valve (60) is located in a primary fluid flow line (18) and this is closed when the pressure in the reservoir (90) builds up to the pressure to interrupt fluid flow to the device (12) to terminate its operation.