Sliding pressure control valve for pneumatic hammer drill

Details Sliding pressure control valve for pneumatic hammer drill Sliding pressure control valve for pneumatic hammer drill

2011-08-30

2011-08-30

Rada, Rinaldi I. (Department: 3721)

Tool driving or impacting

Processes

C173S013000, C173S014000, C173S015000, C173S016000, C173S017000, C173S091000, C173S178000, C173S078000, C173S080000, C173S135000, C173S136000, C091S022000, C091S325000, C251S344000, C251S348000

Reexamination Certificate

active

08006776

ABSTRACT:
A pneumatic device control apparatus and method comprising a ported valve slidably fitted over a feed tube of the pneumatic device, and using a compliant biasing device to constrain motion of the valve to provide asymmetric timing for extended pressurization of a power chamber and reduced pressurization of a return chamber of the pneumatic device. The pneumatic device can be a pneumatic hammer drill.

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