Brushing – scrubbing – and general cleaning – Machines – With means to pass a solid cleaning agent and a fluid...
Reexamination Certificate
2006-02-28
2006-02-28
Thorpe, Timothy S. (Department: 3746)
Brushing, scrubbing, and general cleaning
Machines
With means to pass a solid cleaning agent and a fluid...
C417S392000, C417S379000, C417S391000, C060S370000, C134S008000, C015S104066, C015S104062, C015S003510
Reexamination Certificate
active
07003838
ABSTRACT:
This invention relates to a hydraulic pig advance system comprising a control volume chamber containing hydraulic fluid and a force transmitting member. The system further comprises two directional control valves which can be selectively repositioned to cause hydraulic fluid to cycle the force transmitting member back and force such that in each cycle, a metered amount of hydraulic is transmitted into a pig housing where it causes a pig to move a predetermined distance.
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Duane Morris LLP
Oceaneering International Inc.
Sayoc Emmanuel
Thorpe Timothy S.
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