Apparatus for propelling a coil clad hose

An apparatus comprising:

• a drive mechanism;
• a hollow housing having two separable parts defining one or more parallel through passages between the parts of the housing each for receiving therethrough a coil clad portion of a fluid hose;
• a primary bull gear in the housing fastened to a drive axle connected to the drive mechanism;
• a follower bull gear rotatably fastened to a follower axle extending parallel to the drive axle;
• the follower bull gear meshing with the primary bull gear;
• one or more bull gear/sprocket modules in the housing fastened to each of the axles, each of the bull gear/sprocket modules having a bull gear having teeth extending to a first outer diameter and a sprocket gear having teeth extending a distance less than the first outer diameter, wherein the bull gear teeth of the one or more bull gear/sprocket modules on the drive axle mesh with corresponding bull gear teeth of the bull gear/sprocket module on the follower axle to define between adjacent bull gears an opening width for receiving and passing therebetween a coil clad portion of a high pressure hose aligned with the one or more passages through the housing, and wherein the sprocket gear teeth of the corresponding bull gear/sprocket modules are spaced apart so as to engage the coil clad portion of the high pressure hose, and wherein each tooth on each sprocket gear has a central recessed portion to accommodate passage of the high pressure hose without engaging a surface of the high pressure hose and outer portions extending radially beyond the recessed portion of each tooth so as to engage the coil clad portion of the high pressure hose.

An apparatus for feeding and retracting one or more high pressure hoses, each having a flat wire spring wrapped therearound compressively engaging the high pressure hose, the apparatus comprising:

• a drive mechanism;
• a primary bull gear fastened to a drive axle connected to the drive mechanism;
• a follower bull gear rotatably fastened to a follower axle extending parallel to the drive axle;
• the follower bull gear meshing with the primary bull gear;
• one or more bull gear/sprocket modules fastened to each of the axles, each of the modules having a bull gear having teeth extending to a first outer diameter and a sprocket gear having teeth extending a distance less than the first outer diameter, wherein the bull gear teeth of the one or more modules on the drive axle mesh with corresponding bull gear teeth of the one or more modules on the follower axle to define between adjacent bull gears an opening width for receiving and passing therebetween a high pressure hose having the flat wire spring coil having a spaced apart pitch wrapped around the high pressure hose, wherein the sprocket gear teeth of corresponding opposing bull gear/sprocket modules are spaced apart so as to engage the flat wire spring wrapped around the high pressure hose positioned between corresponding sprockets and wherein each tooth of the sprocket gear teeth has a central recess portion to permit passage of the high pressure hose therethrough without engaging the surface of the high pressure hose and outer portions adjacent each recess portion extending radially beyond the recessed portion for engaging the coil.