(19)
(11) EP 0 467 334 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
08.07.1992 Bulletin 1992/28

(43) Date of publication A2:
22.01.1992 Bulletin 1992/04

(21) Application number: 91111954.3

(22) Date of filing: 17.07.1991
(51) International Patent Classification (IPC)5: B05B 7/12, F16K 1/36, F16K 41/00
(84) Designated Contracting States:
CH DE DK FR GB IT LI NL

(30) Priority: 20.07.1990 US 553432
03.08.1990 US 560744

(60) Divisional application:
94111252.6 / 0634224

(71) Applicant: WAGNER SPRAY TECH CORPORATION
Minneapolis Minnesota 55447 (US)

(72) Inventor:
  • Frank, Peter L.
    Hamel, Minnesota 55340 (US)

(74) Representative: Liesegang, Roland, Dr.-Ing. et al
FORRESTER & BOEHMERT Franz-Joseph-Strasse 38
80801 München
80801 München (DE)


(56) References cited: : 
   
       


    (54) Portable paint gun


    (57) An improved control shaft seal and air valve for a portable paint gun with the seal having a radial clearance with the shaft except at a shaft sealing surface of limited axial length. The shaft seal has a conical surface radially outward of the shaft sealing surface to provide a sealing surface and also to provide transfer of axial forces at that surface to a radial direction to provide a force to urge the shaft sealing surface against the control shaft. A second conical surface of the seal provides for retention of the seal on an air valve spring when the paint gun is disassembled. An improved air valve for portable paint guns is also disclosed having a rigid axial hub and radial support carrying a relatively flexible rim portion adapted to engage a tapered seating surface in the gun.






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