OIL PUMP

PURPOSE:To construct in one unit two sets of pumps and a control section controlling pressure liquid supplies from both pumps simply, by using a pump housing space in a pump body, a pair of valve holes, and a cast hole connecting between them. CONSTITUTION:Two sets of pumps 3, 4 and a pair of spool valves 5, 6 acting as a flow transfer valve and a flow control valve are arranged by using valve holes 31, 32 provided close together with their axes in parallel around a pump housing space 7 formed in the center of pump bodies 1, 2. Furthermore, a path connecting between these valve holes 31, 32 and the pump housing space 7, and a path connecting between an intake and an outlet of a liquid are built by using a cast hole formed in one unit with the pump bodies 1, 2 or a penetrating hole formed by a simple piercing process. Accordingly, the whole structure is made simple and compact, and it can be produced and constructed easily.