Abstract: A non-round pressure sprayer unit for dispensing liquids from a closed container including a pressure pump, tube/hose connection, and applicator wand. The pressure pump mechanism further includes a pump housing sealingly insertable in the pressure sprayer bottle, a plunger for reciprocating within the housing with an upstroke and a downstroke, and a pump piston at the lower end of the plunger. The pump piston includes a bottom closure for closing the lower end of the pump housing when the piston is lowered on the downstroke and capable of opening the lower end of the pump housing when the piston is raised in the upstroke. A pump seal seals the piston and the inner wall of the pump housing when the piston is on its downstroke but becomes unsealed on the upstroke of the piston.

Abstract: An internal mandrel is disclosed which is used for supporting the inner wall of a pipe during bending. A plurality of unique resilient discs is provided. The discs are dome shaped with a rim at the bottom of the dome. The dome has a concave side and a convex side. The discs nest together, i.e. convex side of one into the concave side of the adjacent disc to form a resilient plug. A hydraulic cylinder applies force on the convex side of the outermost disc and the concave side of the innermost disc to deflect the rims of the disc outwardly to contact the inner wall of the pipe being bent.