Abstract: A pipe joint apparatus and method using spiral groove halves formed on the nested surfaces of male and female pipe ends. The exterior half of the spiral groove is connected to an exit port. The interior half of the spiral groove has a proximal end recessed from edge of its pipe. Alignment of the pipes and partial insertion of the spline allows for a threaded pipe connection that may be screwed or unscrewed to overcome the pressure for the gasket seal. Full insertion of the spline to engage the exit port locks the spline in position and the interior half's proximal end prohibits the unscrewing of the pipe joint. The pipe ends may be easily disconnected by pulling the spline out of the exit port to unscrew the pipe sections or fully removing the spline to separate the pipe ends. A gasket is used to form a sealed joint.

Abstract: The machine (1) is provided for production of containers (8) having a trapezoid or triangular form in plane, starting from two films (4) of plastic material superposed on each other. The machine (1) comprises a work station (6) provided with a pair of heat sealing and cutting-out elements (18) extending in directions converging towards each other and transverse to the feed direction of the films (4) so as to simultaneously form two adjacent containers (8) disposed in an inverted relationship with each other in the plane of the films (4). The containers (8) are simultaneousLy removed from opposite sides of the work station (6) by respective removing means (7) provided with clamps (22) and are then released from the clamps (22) and fitted on pairs of underlying needles (36) thus forming stacks.

Abstract: An oscillating sprinkler is specially designed to facilitate assembly, as well as disassembly for purposes of repair of replacement of parts, without sacrifice of water-tight integrity and with improved operating characteristics. The housing for the impulse wheel and for supporting one end of the sprinkler tube is formed of two parts snapped together to effect the necessary seal, the sprinkler tube is mounted therein by a snap action insertion, thereby to define an operating subassembly, and that subassembly is reliably assembled with a mounting subassembly by sliding insertion and snap action retention. The sprinkler tube is sealingly journaled in such a manner as to produce very low friction, thus reducing the load on the impeller wheel and enabling the sprinkler to have a very low pressure drop therethrough, thereby increasing the sprinkling range of the device.