Patent ID: 6634122
Filing Date: 2003-10-21
Classification: E01H,Y10T

Abstract:
In a scraper blade mounting on a truck having frame members comprising a pivotal support arranged at an angle to said frame members and supported therebelow, a scraper blade pivotally mounted on said pivotal support, an operating cylinder support bracket fixedly supported from the frame of said truck, spaced trunnion bearings carried by said support bracket, a spring housing having trunnion bearings transverse to an axis thereof pivotally supported by the trunnion bearings on said bracket and having a first annular abutment at one end, a hydraulic cylinder positioned in spaced relation within said spring housing and having a piston rod reciprocable in said hydraulic cylinder, and means pivotally connecting said piston rod to said scraper blade, said hydraulic cylinder additionally having a second annular abutment spaced from said first annular abutment and being axially slidable and non-rotatively engaged with said spring housing, a compression spring bearing between said first annular abutment on said spring housing and said second annular abutment on said hydraulic cylinder, said hydraulic cylinder having at least one fluid connection at an end adjacent said first annular abutment, wherein the improvement comprises in combination:(a) said fluid connection is defined by a first internally threaded opening in said hydraulic cylinder through which hydraulic fluid is supplied; (b) a service kit comprising a first coupling member having a first external thread threadedly coupled to the thread of said first internally threaded opening and having an axially extending bore therethrough with at least a portion of said bore having a second internal thread configured to provide a connection to a fluid system; (c) a second coupling member having a second external thread and an enlarged head at one end thereof, said second external thread being configured identically to said first external thread; and (d) a plate-like member having a guide hole therethrough configured to loosely receive therethrough said second external thread and prevent said enlarged head from passing therethrough.