Compaction roller

A compaction roller machinery assembly (10) for compacting surfaces such as sand, said assembly (10) comprising;

• a vehicle (22) having a power plant for driving said assembly (10), roller means (18) extending in a cantilevered fashion from a pivot axis on said vehicle (12) for compacting a surface, said roller means (18) including a housing;
• roller lift means (20) mounted to said vehicle (12) and interconnecting said roller means (18) and said vehicle (12) for raising and lowering said roller means (18) about said pivot axis between a raised position and a surface-engaged position, said roller means (18) including a roller (22) for rolling and compacting surfaces and vibration-producing means (24) for vibrating said roller (22) to facilitate the compaction of the surfaces, said vibration-producing means (24) and said roller (22) disposed within said housing (28) and at least one stabilizer (30) extending between said housing (28) and said vehicle (12), said stabilizer (30) being fixedly secured at one end to said housing (28) and pivotally connected at the opposite end to said vehicle (12), said roller lift means (20) including a hydraulic cylinder (32) having a piston movable therein between first and second positions and a rod (34) extending from the piston exteriorly of the cylinder (32) and a piston delivery passage (36) for providing positive fluid pressure to one side of said piston in said cylinder (32) to move said rod (34) to its extended position and a piston return passage (38) for providing positive fluid pressure to the other side of said piston in said cylinder (32) to move said rod (34) to its retracted position to lift said roller means (18);
• said roller lift means (20) including a cylinder support means (40), said cylinder (32) pivotally connected at one end to said cylinder support means (40), said housing (28) including a mounting bracket (48), said rod (34) pivotally connected at the distal end to said bracket (48), said hydraulic cylinder (32) raising said roller means (18) to said raised position when said rod (34) is moved to its retracted position and lowering said roller means (18) to said lowered position once said rod (34) is moved to its extended position;
• said assembly further including a first hydraulic pump means for supplying said roller lift means (20) with hydraulic power for raising and lowering said roller means (18) and a second hydraulic pump means (26) disposed on said vehicle (12) for supplying hydraulic power to said hydraulic vibration producing means (24) on said roller means (18) to vibrate said roller (22) to facilitate compaction of the surface;
• said vehicle (12) including a fluid reservoir (56) for storing a quantity of fluid and a power take off shaft driven by said vehicle (12), said hydraulic pump means (26) including a hydraulic pump operatively connected to said vehicle (12) at the power take off shaft for driving said hydraulic pump (26);
• said assembly further including fluid delivery means (62) interconnecting with said vibration producing means (24) and said fluid reservoir (56) for providing fluid communication therebetween;
• said fluid delivery means (62) including a valve means (64) and an arterial passage (66) extending between said valve means (64) and said second hydraulic pump (26) for providing fluid communication therebetween, said valve means (64) for selectively regulating the flow of fluid to and from said vibration-producing means (24) on said roller means (18);
• said delivery means (62) further including a control means (68) operatively connected to said valve means (64) for selectively regulating said valve means (64) to direct the flow of fluid to and from said vibration producing means (24) on said roller means (18);
• delivery means (62) also including a compactor delivery passage (70) extending between said valve means (64) and said vibration producing means (24) for providing fluid communication therebetween and a compactor return passage (72) extending between said vibration producing means (24) and said fluid reservoir (56) for providing fluid communication therebetween;
• said delivery means (62) including a bypass passage (74) extending between said valve means (64) and a point in said compactor return passage (72) for providing fluid communication between said valve means (64) and said compactor return passage (72) to bypass the vibration producing means (24) when said valve means (64) is in a predetermined bypass position;
• said delivery means (62) further including a pump return passage (78) extending between said pump (26) and said fluid reservoir (56) for providing fluid communication therebetween and a relief passage (80) extending between said vibration producing means (24) and said fluid reservoir (56) to provide a path for fluid flow when the hydraulic fluid pressure in the hydraulic vibration producing means (24) exceeds a predetermined level.