Abstract: An affordable family of threaded pipe connections is disclosed, that have desired strengths and service torques, for a wide range of sizes and services.

Abstract: Adjustment of stresses within a threaded connection having radial thread interference is taught by forming the box and pin threads on different axial pitches before assembly, so as to result in a preferred stress pattern after assembly. Also taught, is how to shape thread forms so as to avoid galling while connecting or disconnecting the box and pin.

Abstract: A cost effective bumper for a vehicle is provided that develops maximum resiliency of an inflated spare wheel to dampen shock of impacts so as to reduce injury to the occupants and reduce repair cost of the vehicle, without need for additional parts or cost. The bumper is especially suited to increase the safety of small automobiles, and storage of the spare wheel in the bumper assembly gives added room in the luggage compartment. The introduction of Hybrid power plants for small automobiles allows timely opportunities for new placements of engine components, to best accommodate the bumper assembly of the present invention.

Abstract: An integral high strength threaded pipe connection formed on joints of plain-end pipe, and a method for manufacturing, wherein the ends of the joints are rough machined, swaged, and then finish machined, preferably but not necessarily, with only one chucking.

Abstract: A high strength Wedgethread Pipe Connection having a ratio of the radius change per turn to the thread width change per turn, as is required to maintain both a thread seal and tightness, even when the connection is subjected to transient service loads such as vibrations, shock, bending, tension, compression, torsion and/or thermal changes. The thread form may be Open or Trapped for use on large or small diameter pipe, configured such as: a flush joint; with collars of larger diameter than the pipe; with double-pin couplings; tool and accessory connections; or it may also be used to reversibly connect such as solid structural posts to base members where a wide range of repeatable makeup torque is desired. The threads have provisions for ease of manufacture and assembly, and to minimize handling damage.

Abstract: A high strength Wedgethread Pipe Connection having a ratio of the radius change per turn to the thread width change per turn, as is required to maintain both a thread seal and tightness, even when the connection is subjected to transient service loads such as vibrations, shock, bending, tension, compression, torsion and/or thermal changes. The thread form may be Open or Trapped for use on large or small diameter pipe, configured such as: a flush joint; with collars of larger diameter than the pipe; with double-pin couplings; tool and accessory connections; or it may also be used to reversibly connect such as solid structural posts to base members where a wide range of repeatable makeup torque is desired. The threads have provisions for ease of manufacture and assembly, and to minimize handling damage.

Abstract: Several embodiments of a wedgethread pipe connection are disclosed that have improved makeup, sealing and non-loosening characteristics. In one embodiment, an open wedgethread is disclosed that has an included angle measured in the gap between the stab flank and the load flank to be not less than zero, so as to prevent premature wedging between mating flanks before the position of full makeup is reached, as does occur between trapped wedgethreads wherein the included angle is less than zero.