Stopcocks

• US 3,907,248 A
• Filed: 07/20/1973
• Issued: 09/23/1975
• Est. Priority Date: 07/20/1973
• Status: Expired due to Term

• Current Assignee: Maxwell Glover Coulbeck
• Original Assignee: Maxwell Glover Coulbeck
• Inventors: Coulbeck, Maxwell Glover
• Primary Examiner(s): Rosenthal, Arnold
• Application Number:
  US05/380,947
• Time in Patent Office: 795 Days
• Field of Search: 251/31,30,61.5,61.6,62,44
• US Class Current: 251/30.02
• CPC Class Codes: F16K 31/122 the fluid acting on a piston F16K31/143, F16K31/163, F16K31/363, F16K31/383 take precedence
• CPC Class Codes: F16K 31/406 acting on a piston

Abstract

The invention comprises a stopcock assembly for controlling fluid flow, particularly water, and has an inlet and an outlet for the passage of fluid, a valve unit interposed between the inlet and outlet and having a valve and a valve seat and a valve stem extending from the valve and connected to a piston within a chamber separated from the main fluid flow area of the stopcock assembly, and manual or electric solenoid operated means for directing fluid to either side of the chamber for effecting movement of the valve stem and thus movement of the valve away from or towards the valve seat to permit or prevent flow of fluid through the stopcock.

Claims

1. A valve control assembly having inlet and outlet conduits for the passage of fluids, a valve seat between the inlet and outlet conduits, a valve movable onto or away from the valve seat, and a valve stem secured to said seat;

the improvement comprising;

a. a cylindrical chamber separated from the valve conduits and in axial alignment with the valve stem, and a piston within the chamber secured to the valve stem for moving the valve onto or away from the valve seat;

b. a first control means for closing the valve including a first control conduit connected between the inlet conduit and an opening into an outer side of said piston for moving the piston, the valve stem, and the valve toward the valve seat to close the valve, and an electric solenoid operated valve connected in series with the first control conduit for operating the first control means;

c. a second control means for opening the valve including a second control conduit connecTed between the inlet conduit and an opening into an inner side of said piston for moving the piston, the valve stem, and the valve away from the valve seat to open the valve, and an electric solenoid operated valve connected in series with the second control conduit for operating the second control means;

d. a first discharge valve, operated by an electric solenoid, connected to the second control conduit for discharging fluid from the cylinder when the valve is being closed; and

e. a second discharge valve, operated by an electric solenoid, connected to the first control conduit for discharging fluid from the cylinder when the valve is being opened.

2. A valve assembly according to claim 1 wherein the inlet and outlet conduits are co-axial in a main housing and the valve seat is positioned in an inclined plane between the inlet and outlet conduits.

3. A valve assembly according to claim 1 wherein the piston and chamber are positioned within a separable housing extension comprising a flanged boss in sealing engagement with the inlet and outlet conduits through which the valve stem is slidably located.