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US 5,494,078 AGranted
Pneumatic lift device for dual flow valve
AssigneeThe Aro Corporation
InventorRobert J. Schulte
Life of this patent
Estimating the term…
Abstract
Positive adjustable flow is provided for a dual flow valve for paint dispensing or the like utilizing a sliding piston and a lost motion device in combination with an adjustable stop and wherein operating lift is provided by a single pressure source alternatively applied to a plurality of operating pistons.
Claims9
A lift device for a dual flow valve comprising:
- a reciprocating flow control stem operatively engaged in one direction by a first piston reciprocating in a cylinder between defined limits of a forward stop and a rearward stop;
- a second piston operatively connected to said flow control stem and reciprocating in a second cylinder between defined limits of a forward position and a rearward position;
- a movable stop for adjusting said rearward position;
- and
- a lost motion means operable by said flow control stem to accumulate reciprocation of said flow control stem imparted in said one direction by reciprocation of said first piston.
2 more elements
A lift device for a dual flow valve for dispensing paint, comprising:
- a reciprocating flow control stem operatively engaged in one direction by a first piston reciprocating in a cylinder between defined limits of a forward stop and a rearward stop;
- a second piston operatively connected to said flow control stem and reciprocating in a second cylinder between defined limits of a forward position and a rearward position;
- a movable stop for adjusting said rearward position;
- and
- a lost motion means operable by said flow control stem to accumulate reciprocation of said flow control stem imparted in said one direction by reciprocation of said first piston.
2 more elements
Dependencies are inferred from the claim text.