Patent ID: 6116093
Filing Date: 2000-09-12
Classification: G01L

Abstract:
A hydraulic fluid system for screwing the shaft of an anchor down into the ground comprising:a hydraulic fluid motor connected to the shaft for rotating the anchor;a high pressure hydraulic fluid main supply line to said motor;a low pressure hydraulic fluid main return line from said motor; anda differential pressure gauge assembly for measuring the hydraulic fluid pressure differential between said high pressure supply line and said low pressure return line; said differential gauge assembly including:an inner differential pressure gauge having an outer gauge housing enclosing a bourdon tube;an outer fluid-tight housing releasably assembled about and enclosing said inner differential pressure gauge;a high pressure hydraulic fluid branch line from said main supply line extending through said outer fluid-tight housing and said outer gauge housing in fluid communication with the interior of said bourdon tube to provide high pressure hydraulic fluid to the interior of said bourdon tube; anda low pressure hydraulic fluid branch line from said main return line extending through said outer fluid-tight housing and communicating with the space about said differential pressure gauge and in fluid communication with the outside of said bourdon tube; whereby said differential pressure gauge is effective for measuring the fluid pressure differential between said low pressure main return line and said high pressure main supply line;said outer fluid-tight housing including an open ended cylindrical body and a pair of opposed end members connected to opposite ends of said open ended cylindrical body in a fluid-tight relation, one of said end members having said low pressure fluid inlet and said high pressure fluid inlet therein the other end member being transparent for visual observation of said pressure gauge.