Portable urethane spray gun

Claim 2

A SPRAY GUN AND NOZZLE COMBINATION COMPRISING: A NOZZLE FOR PROJECTING A SPRAY MADE UP OF TWO COMPONENTS COMPRISING AN INNER NOZZLE MEMBER MADE OF A MATERIAL HAVING THE RESILIENT AND FRICTIONAL PROPERTIES OF TEFLON, HAVING AN OUTER GENERALLY CONICAL END AND A CENTRAL BORE, TWO LATERALLY DISPOSED BORES IN SAID INNER NOZZLE MEMBER, TWO TANGENTIAL BORES EACH COMMUNICATING WITH A SAID LATERAL BORE AND EXTENNDING INWARDLY THEREFROM AND TOWARD SAID CONICAL END AND TERMINATING IN SAID CENTRAL BORE WHEREBY MATERIAL FROM EACH OF SAID LATERAL BORES IS PROJECTED INTO SAID CENTRAL BORE IN A TANGENTIAL PATH AND MIXEX THEREIN, AN OUTER NOZZLE MEMBER IS DISPOSED OVER SAID INNER NOZZLE MEMBER. SAID OUTER NOZZLE MEMBER HAVING A CONCAVE CONICAL END NESTING ON SAID INNER NOZZLE MEMBER AND HAVING A CENTRAL BORE TAPERING FROM SAID CONICAL SURFACE TO A SMALL ORIFICE, A CENTRAL ROD EXTENDIING THROUGH SAID CENTRAL BORE IN SAID INNER NOZZLE MEMBER, SAID CONTROL ROD HAVING TRIGGER MEANS ATTACHED THERETO, SAID CONTROL ROD MAKING SLIDING AND SEALING ENGAGEMENT WITH THE INNER SURFACE OF SAID CENTRAL BORE, THEREBY PROVIDING A SEAL PREVENTING THE ESCAPE OF MATERIAL.

Claim 3

The combination recited in claim 1 wherein said inner nozzle member has a cylindrical outside surface, and said cylindrical part is disposed in a cylindrical cavity in a head.

Claim 4

In combination, a spray gun and a nozzle and a shutoff means, said spray gun having a block, a central bore in said block, said central bore receiving said nozzle, an axial bore through said nozzle, and a control rod extending through said axial bore, a tangentially disposed bore in said nozzle, a lateral bore in said block communicating with said tangential bore, a counterbore communicating with said lateral bore, said counterbore having a Teflon insert, a central bore through said Teflon insert communicating with said lateral bore in said block, a central rod slidably received in said central bore providing a seal with said Teflon material, and a lateral bore in said Teflon insert having a supply of material to be sprayed through said nozzle connected thereto, a rod extending through said Teflon insert, said rod having an axial bore and an elongated lateral bore extending diammetrically through said rod communicating with said axial bore therein, said rod having handle means thereOn for rotating said rod to align said elongated lateral bore with said material supply thereby connecting said material supply with said tangential bore in said nozzle, said rod being rotatable to bring said elongated lateral bore therein out of alignment with said material supply whereby said material supply is shut off, said block has a second lateral bore disposed generally at right angles to said first lateral bore and at right angles to said rod, said second lateral bore communicating with said axial bore in said insert whereby said second lateral bore is in alignment with said elongated bore when said rod is rotated to bring said elongated bore out of alignment with said material supply whereby a tool may be inserted in said second lateral bore for cleaning said elongated bore, said rod has a handle and a pointer on said handle, said pointer being adapted to cooperate with means on said block to shut off the flow of material to said nozzle.

Claim 5

In combination, a spray gun and a nozzle and a shutoff means, said spray gun having a block, a central bore in said block, said central bore receiving said nozzle, an axial bore through said nozzle, and a control rod extending through said axial bore, a tangentially disposed bore in said nozzle, a lateral bore in said block communicating with said tangential bore, a counterbore communicating with said lateral bore, said counterbore having a Teflon insert, a central bore through said Teflon insert communicating with said lateral bore in said block, a central rod slidably received in said central bore providing a seal with said Teflon material, and a lateral bore in said Teflon insert having a supply of material to be sprayed through said nozzle connected thereto, a rod extending through said Teflon insert, said rod having an axial bore and an elongated lateral bore extending diammetrically through said rod communicating with said axial bore therein, said rod having handle means thereOn for rotating said rod to align said elongated lateral bore with said material supply thereby connecting said material supply with said tangential bore in said nozzle, said rod being rotatable to bring said elongated lateral bore therein out of alignment with said material supply whereby said material supply is shut off, said block has a second lateral bore disposed generally at right angles to said first lateral bore and at right angles to said rod, said second lateral bore communicating with said axial bore in said insert whereby said second lateral bore is in alignment with said elongated bore when said rod is rotated to bring said elongated bore out of alignment with said material supply whereby a tool may be inserted in said second lateral bore for cleaning said elongated bore, said rod has a handle and a pointer on said handle, said pointer being adapted to cooperate with means on said block to shut off the flow of material to said nozzle.