Trailer stabilizing jack

A stabilizing jack having a longitudinal vertical axis comprising a base having an upwardly opening axially extending tubular socket, a head axially spaced above said base and having a downwardly opening axially extending tubular socket, said head including an internally threaded bore which is axially aligned with and intersects said downwardly opening socket, an elongated axially extending tubular column having opposing end portions received in the sockets of said base and said head, fastening means at opposite ends of said column for securing said base and said head to said column, an axially extending jack screw assembly having upper and lower portions, said assembly being threadedly carried by said head and having its lower portion axially movable within said column, said jack screw assembly comprising a tubular externally threaded screw member and a generally solid core member which extends through and has a length greater than said screw member, said screw and core members having inner and outer ends, a stop plate located within said column abutting the inner ends of said screw and core members and being secured to said core member, said screw member being threadedly mounted in the threaded bore of said head for axial movement whereby said screw member and said core member move together as a unit relative to said tubular column and said head, said core member having its outer end extending above and being spaced from the top surface of said screw member, a load plate, means for adjustably securing said load plate to the outer end of said core member, and a ratchet and pawl mechanism carried by said core member in the space between the top surface of said screw member and said load plate for rotating said screw member in opposite directions relative to said head and thereby raising or lowering said core member and said load plate.