Control valve

• US 4,429,714 A
• Filed: 08/03/1981
• Issued: 02/07/1984
• Est. Priority Date: 08/03/1981
• Status: Expired due to Fees

• Current Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Original Assignee: E. I. du Pont de Nemours and Company (Corteva, Inc.)
• Inventors: Dear, Terrence A., Hughes, Allan B.
• Primary Examiner(s): Rosenthal, Arnold
• Application Number:
  US06/290,081
• Time in Patent Office: 918 Days
• Field of Search: 137/625.3, 137/625.37, 251/127, 138/41, 138/42
• US Class Current: 137/625.3
• CPC Class Codes: F16K 47/08 for decreasing pressure or noise level and having a throttling member separate from the closure member , e.g. screens, slots, labyrinths
• CPC Class Codes: Y10T 137/86734 With metering feature
• CPC Class Codes: Y10T 137/86791 Piston

Abstract

A flow control valve having a flow-dividing cage surrounding its plug. The cage includes stacked plates spaced by dependent legs and annular screens in the spaces between adjacent plates.

Claims

1. In a valve including a body with a passage therethrough, a seat in the passage and a plug movable toward and away from the seat, a cage surrounding the plug, said cage comprising:

a stack of annular plates and an annular wire screen between each pair of adjacent plates, the plates having spaced legs projecting from one side adjacent the inner and outer edges thereof, each screen also being located between the inner and outer legs of one plate.

2. The valve of claim 1 wherein the legs are narrow and the inner legs are staggered angularly with respect to the outer legs on each plate.

3. The valve of claim 2 wherein is provided an annular ledge on the other side of each plate, each screen being on a ledge, there being an annular duct between each pair of adjacent plates interrupted only by a screen and the legs on one of the plates.

4. The valve of claim 3 wherein each screen is constrained by the legs and a pair of plates in a preloaded condition.