Method and apparatus for controlling opening and closing speed o

Details Method and apparatus for controlling opening and closing speed o Method and apparatus for controlling opening and closing speed o

1999-01-11

2000-05-09

Dudash, Diana

Coating processes

Spraying

222518, 2395855, B05D 102

Patent

active

060601256

ABSTRACT:
Dispensing apparatus including a dispensing gun having a gun body and a valve mechanism disposed in the gun body. The valve mechanism is operatively coupled to a piston mounted for reciprocating movement and the valve mechanism is operable between opened and closed positions for selectively dispensing liquid from the dispensing gun. A hydraulic actuator is operatively coupled to the piston for moving the piston by way of an output of hydraulic pressure. A flow control device is operatively coupled to the hydraulic actuator for regulating liquid flow from the hydraulic actuator and thereby controlling at least one of the opening speed and closing speed of the valve mechanism. A method of dispensing liquid in accordance with the disclosure includes holding a supply of pressurized liquid in a liquid passage of the dispensing gun, moving the piston under the force of hydraulic pressure to move the valve mechanism from the closed position to the opened position, and dispensing pressurized liquid from the gun.

REFERENCES:
patent: Re29495 (1977-12-01), Georgi
patent: 3742713 (1973-07-01), Schweitzer
patent: 4465212 (1984-08-01), Boone
patent: 4579255 (1986-04-01), Frates et al.
patent: 4678100 (1987-07-01), Gelines et al.
patent: 5076501 (1991-12-01), Tschumi
patent: 5747102 (1998-05-01), Smith et al.

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