Paint spray gun nozzle assembly

A paint spray gun, comprising:

• a valve body having an air passage therethrough adapted to be connected to a source of compressed air, a control valve in the passage for controlling the flow of air, a unitary plastic nozzle body including an air inlet passage, a paint inlet passage and an elongated nozzle tip receiving portion connected to receive paint from the paint inlet passage, said nozzle body air inlet passage being annular in configuration and defined by a pair of integral substantially concentric radially spaced annular walls, the inner one of said annular walls having a frusto-conical alignment surface, said nozzle body paint inlet passage being defined by an integral fitting extending transversely from the nozzle body, a nozzle tip separate from the nozzle body mounted for universal movement on the nozzle tip receiving portion, a needle valve axially movable in the nozzle tip to control paint flow, a one-piece plastic air cap mounted on and over the nozzle body having a central orifice and an annular air passage communicating with the nozzle body air inlet passage, and a plurality of air outlet ports in the air cap, said air cap having a frusto-conical surface aligned with an engaging the frusto-conical surface on the nozzle body inner wall to axially locate the air cap on the nozzle body, said air cap having a rearwardly extending annular wall immediately around the orifice for receiving and engaging the forward end of the nozzle tip.

A paint spray gun, comprising:

• a valve body having an air passage therethrough adapted to be connected to a source of compressed air, a control valve in the passage for controlling the flow of air, a unitary plastic nozzle body including an air inlet passage, a paint inlet passage and an elongated nozzle tip receiving portion connected to receive paint from the paint inlet passage, said nozzle body air inlet passage being annular in configuration and defined by a pair of integral substantially concentric radially spaced annular walls, the inner one of said annular walls having a frusto-conical alignment surface, said nozzle body paint inlet passage being defined by an integral fitting extending transversely from the nozzle unit, a nozzle tip separate from the nozzle body having a flexible inwardly directed rim that snaps over a spheroidal projection on the end of the nozzle tip receiving portion, said nozzle tip being pivotally mounted on the spherical projection, a one-piece plastic air cap mounted over the nozzle body having a central orifice and an annular air passage communicating with the nozzle body air inlet passage, and a plurality of air outlet ports in the air cap, said air cap having a frusto-conical surface aligned with and engaging the frusto-conical surface on the nozzle body inner wall, said nozzle tip including a frusto-conical portion with a plurality of radially extending vanes thereon, said vanes each having an axially extending outer surface parallel to the axis of the nozzle tip portion, said air cap having a rearwardly extending annular projection coaxial with the orifice and adapted to receive and engage the vanes' outer surfaces to pivot and align the nozzle tip in the air cap orifice, said vanes each having a stepped portion defining radial shoulders that engage the annular projection on the air cap to axially locate the nozzle tip with respect to the nozzle body.