Claims
- 1. A spray tip comprising:
- a. a body subassembly comprising a housing having a longitudinal through passageway extending from an inlet passage to an open discharge end, an intersecting orthogonal cylindrical bore, and adapter means attached to its end having said inlet passage for attachment of said body subassembly to a spray gun;
- b. a cylindrical turret member having a distal portion removably and rotatably seated in said intersecting orthogonal cylindrical bore of said housing, and having a transverse bore rotatable into alignment with said through passageway; and
- c. a spray tip orifice member mounted in said orthogonal cylindrical bore of said turret member; and
- d. a seal member axially having a seal through passageway and slidably received in said through passageway of said housing and being freely slidable into and out of said through passageway of said housing through said inlet passage thereof and including a turret member seal having a cylindrical concave seal surface facing said turret member; and with the diameter of said distal portion of said turret member having a diameter less than the diameter of said open end of said housing whereby said distal portion of said turret member can be inserted into the open end of said housing to abut said seal member and eject said seal member through said inlet passage.
- 2. The spray tip of claim 1 wherein the inlet passage of said through passageway is of greater diameter than its discharge end, thereby providing an annular shoulder between the inlet passage and said intersecting bore and said seal has a coacting annular rim of greater diameter whereby said annular shoulder serves as a stop limiting the axial movement of said seal through said through passageway of said housing.
- 3. The spray tip of claim 2 wherein the distance from said annular shoulder to the perimeter of said cylindrical bore is approximately 0.05 to 0.15 inch less than the length from said coacting annular rim to the cylindrically concave face of said seal, to permit said seal to enter into said cylindrical bore by said distance when said turret member is removed from said cylindrical bore.
- 4. The spray tip of claim 3 wherein the lower end of said turret member is beveled at an angle of at least 60 degrees to its end face to permit it to be inserted into said orthogonal cylindrical bore past said seal.
- 5. The spray tip of claim 2 wherein said turret member has a lesser diameter than said annular shoulder whereby it can be inserted into said through passageway and past said annular shoulder.
- 6. The spray tip of claim 1 wherein said seal includes a piston portion received in said inlet passage.
- 7. The spray tip of claim 6 including annular seal means received about said piston portion of said seal and engaging the inside walls of said through passage to effect fluid sealing of said piston portion of said seal against said line pressure within said passage.
- 8. The spray tip of claim 7 wherein said seal is an acetal plastic.
- 9. The spray tip of claim 1 including resilient means positioned to bias said seal against said turret member.
- 10. The spray tip of claim 1 wherein said seal is a hard plastic.
- 11. The spray tip of claim 1 wherein said seal is a fiber reinforced plastic.
- 12. A combination of a spray gun having a discharge barrel with an externally threaded discharge end and a spray tip received thereon and comprising:
- a. a spray tip subassembly including an outer, annular flange and an inlet passage on one end and a housing with an open discharge end opposite said one end and having a longitudinal chamber and an intersecting orthogonal cylindrical bore;
- b. a cylindrical turret member removably and rotatably seated in said intersecting orthogonal cylindrical bore of said housing, and having a transverse bore rotatable into alignment with said through passageway and a diameter less than the diameter of said open end of said housing whereby said turret member can also be inserted into the open end of said housing;
- c. a spray tip orific member mounted in said transverse bore; and
- d. a single seal subassembly axially slidably received in said longitudinal chamber and comprising:
- (i) a turret member seal formed of a hard, reinforced plastic received in said longitudinal chamber and having a rear face facing said inlet passage and a cylindrical concave seal surface facing said turret member with a central through passageway therebetween; and
- (ii) resilient means captured between said seal and the end of the barrel of said spray gun to bias said seal against said turret member; and
- e. a retainer nut received over said outer flange of said housing and threadably engaged onto said externally threaded end of said spray gun discharge barrel.
- 13. The combination of claim 12 wherein said resilient means is a compression spring captured between said piston and said spray gun discharge barrel.
- 14. The combination of claim 12 including a piston portion of said seal received in said central inlet passage.
- 15. The spray tip of claim 12 wherein said longitudinal chamber has a shoulder on its inner wall, intermediate its length, and said seal has a coacting annular rim of greater diameter whereby said shoulder serves as a stop limiting the axial movement of said seal through said longitudinal chamber of said housing.
- 16. The spray tip of claim 15 wherein said turret member has a diameter sufficiently small to permit it to be inserted into said longitudinal chamber, past said shoulder, and thereby serve to eject said seal from said housing.
- 17. The spray tip of claim 16 including annular seal means received about said piston portion and engaging the inside walls of said longitudinal chamber to effect fluid sealing of said piston portion against said line pressure within said chamber.
- 18. In a spray tip for the pressured spraying of liquids having a spray tip body with a through passageway with an inlet end to receive liquid under pressure and an outlet end to discharge liquid, and a receptacle which intersects said through passageway having at least one open end with a holder rotatably received in said open end of said receptacle and supporting a spray orifice within said through passage, and a seal slidably received within said through passageway and freely slidable into and out of said through passageway through said inlet end thereof and located between said inlet end of said body and said holder and having a sealing face which is compressed against said holder, the improvement which comprises: providing said holder with a lesser diameter than said passageway and said seal, whereby said holder may be removed from its receptacle and inserted through said discharge end of said through passageway to eject said seal from the inlet end of said through passageway.
- 19. The spray tip of claim 18 wherein said seal includes a piston portion received in said through passageway.
- 20. The spray tip of claim 18 including annular seal means received about said seal piston and engaging the inside walls of said through passageway to effect fluid sealing of said piston against said line pressure within said passageway.
- 21. the spray tip of claim I8 including resilient means positioned to bias said seal against said turret member.
- 22. The spray tip of claim 18 wherein said seal is a hard plastic.
- 23. The spray tip of claim 18 wherein said seal is a fiber reinforced plastic.
- 24. The spray tip of claim 23 wherein said seal is an acetal plastic.
REFERENCE TO RELATED APPLICATIONS
This application is a continuation in part of Ser. No. 766,190, filed Aug. 16, 1985, now U.S. Pat. No. 4,715,537, issued Dec. 29, 1987.
US Referenced Citations (7)
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
766190 |
Aug 1985 |
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