Circuitry for operating an extendable boom and service line

Details Circuitry for operating an extendable boom and service line Circuitry for operating an extendable boom and service line

F - Mech Eng,Light,Heat,Weapons

16

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212/29

F16L 3/00 (2006.01) B66C 23/18 (2006.01) B66C 23/70 (2006.01) F16L 3/015 (2006.01)

Patent

CA 1241304

-15- ABSTRACT OF THE DISCLOSURE A hydraulic circuit for selectively extending and retracting a mobile telescoping boom assembly and for independently extending and retracting an articulated pipe service line mounted on the boom assembly. The circuit can be used with a hydraulic ram to extend and retract the boom assembly or a winch and cable arrange- ment can be used. A pair of winches are used to extend and retract the articulated service line.

458608

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