Overflow vent valve

• US 4,640,304 A
• Filed: 03/22/1985
• Issued: 02/03/1987
• Est. Priority Date: 03/22/1985
• Status: Expired due to Fees

• Current Assignee: Baird Manufacturing Company
• Original Assignee: Baird Manufacturing Company
• Inventors: Looney, Raymond H.
• Primary Examiner(s): Cohan, Alan
• Application Number:
  US06/714,982
• Time in Patent Office: 683 Days
• Field of Search: 137/202, 137/433, 137/614.2, 137/614.21
• US Class Current: 137/202
• CPC Class Codes: F16K 24/046 the assembly of float and valve element being a single spherical element
• CPC Class Codes: Y10T 137/3099 Float responsive
• CPC Class Codes: Y10T 137/88054 Direct response normally closed valve limits direction of flow
• CPC Class Codes: Y10T 137/88062 Coaxial oppositely directed seats

Abstract

An overflow vent valve comprising a housing adapted to be installed wherein it is desirable to release excessive gas pressure from a flow system while precluding the discharge of liquid therefrom, a normally closed pressure responsive check valve disposed within the housing, a ported cage secured to the check valve and suspended within the interior of the housing for communication fluid pressure from the housing to the check valve, and a lightweight ball loosely disposed within the interior of the ported cage for floating on the surface of any liquid present within the interior of the cage, the ball adapted to engage a second valve seat provided on the check valve in the event the level of the liquid rises sufficiently within the cage, the engagement of the lightweight valve with the second valve seat precluding the discharge of liquid from the overflow vent valve assembly.

Claims

1. An overlfow vent valve comprising outer housing means, pressure responsive normally closed check valve means disposed within the outer housing means and responsive to excessive pressure in the housing means for exhausting the pressure therefrom, ported cage means secured to the check valve means and suspended within the interior of the outer housing means, the interior of the ported cage means being in communication with the interior of the outer housing means for receiving fluid pressure therefrom and in communication with the check valve means, said ported cage means including (a) a sleeve member having one end open for communication with the check valve means and the opposite end thereof closed, (b) first port means provided in the proximity of the closed end whereby any liquid present in the interior of the outer housing initially enters the interior of the ported cage means and (c) slot means provided in said sleeve member in the proximity of the open end, said slot means being of larger area than the area of said first port means, secondary valve seat means provided on the check valve means and opens to the interior of the ported cage means, valve closure means loosely disposed within the ported cage means and is not in the proximity of said slot means when said valve closure means is adjacent the closed end of said sleeve member for engaging the secondary valve seat means when the liquid level rises sufficiently within the ported cage means whereby gaseous components of a flow stream may be exhausted through the check valve means and liquid components of the flow stream are precluded from discharge through the check valve means.

2. An overflow vent valve as set forth in claim 1 wherein the valve closure means in the ported change means is a lightweight ball adapted to float on the surface of any liquid contained within the interior of the ported cage means.

3. An overflow vent valve as set forth in claim 1 wherein the outer housing means includes ported cap means encasing a portion of the check valve means for exhaust of any gaseous components released through the check valve means.