Variable flow restriction device

• US 3,095,006 A
• Filed: 12/08/1961
• Issued: 06/25/1963
• Est. Priority Date: 12/08/1961
• Status: Expired due to Term

• Current Assignee: Sydney S. Smith
• Original Assignee: Sydney S. Smith
• Inventors: Smith, Sydney S.
• Application Number:
  US04/158,095
• Time in Patent Office: 564 Days
• US Class Current: 137/269.5
• CPC Class Codes: F16K 47/06 with a throttle in the form of a helical channel
• CPC Class Codes: F16K 47/10 in which the medium in one direction must flow through the throttling channel, and in the other direction may flow through a much wider channel parallel to the throttling channel
• CPC Class Codes: Y10T 137/5153 Reversible check
• CPC Class Codes: Y10T 137/87378 Second valve assembly carried by first valve head
• CPC Class Codes: Y10T 137/87539 Having guide or restrictor

Claims

1. A FLUID VARIABLE FLOW RESTRICTION DEVICE INCLUDING AN OUTER GENERALLY CYLINDRICAL BODY AND A GENERALLY CYLINDRICAL PLUG WITHIN THE BODY, SAID BODY HAVING AN INLET AND AN OUTLET AXIALLY SPACED THEREFROM, THE OUTER SURFACE OF THE PLUG AND THE INNER SURFACE OF THE BODY HAVING MATED SURFACES THAT DEFINE A PAIR OF PARALLEL GENERALLY HELICAL RESTRICTED ANNULAR FLOW PATHS, EACH GENERALLY UNIFORM IN CROSS SECTION, SAID FLOW PATHS BEING IN COMMUNICATION WITH SAID INLET AND BEING DIRECTED UNIFORMLY AND IN AN ANNULAR DIRECTION TOWARD THE OUTLET, MOVEMENT OF SAID PLUG RELATIVE TO SAID BODY BEING EFFECTIVE TO CHANGE THE CROSS SECTIONAL AREA OF SAID FLOW PATHS.