Pair of cooperating disks to control the delivery of liquid in so-called "sc" valves

• US 4,946,134 A
• Filed: 11/30/1989
• Issued: 08/07/1990
• Est. Priority Date: 12/02/1988
• Status: Expired due to Fees

• Current Assignee: Galatron Srl
• Original Assignee: Galatron Srl
• Inventors: Orlandi, Alessio
• Primary Examiner(s): Walton, George L.
• Application Number:
  US07/443,934
• Time in Patent Office: 250 Days
• Field of Search: 137/315, 137/454.2, 137/454.5, 137/454.6, 137/625.31, 137/603, 137/605, 137/801, 251/205, 251/208, 251/209, 251/210, 251/304, 251/314, 251/316, 251/368
• US Class Current: 251/208
• CPC Class Codes: F16K 11/074 with flat sealing faces
• CPC Class Codes: F16K 3/08 with circular plates rotatable around their centres
• CPC Class Codes: F16K 3/34 Arrangements for modifying the way in which the rate of flow varies during the actuation of the valve
• CPC Class Codes: Y10T 137/86743 Rotary

Abstract

The object of the invention is a pair of superimposed ceramic disks (11,12) to open and close screw type valves, one of said disks (11) being fixed and the other one (12) being movable on the fixed disk, where each of said disks presents a slot or opening (15,16) composed by a segment portion (15'"'"',16'"'"') and by a tapered curved portion (15,",16") extending from one end of said segment portion, the slot or opening (15) of one disk (11) being turned in a direction which is opposite to the direction of slot (16) in the other disk (12), so that when opening the valve the tapered curved portions (15",16") are the first to superimpose to gradually increase the flow of the delivered liquid.

Claims

1. A pair of superimposed ceramic disks for faucet valves, comprising:

a fixed disk having a fixed disk opening passing through the fixed disk with a first arcuate wall cooperating with a second arcuate wall spaced a substantially constant distance from said first arcuate wall to define a slot opening portion having a substantially constant width and cooperating with opposite walls to define an angular segment opening portion, the fixed disk segment opening portion and the fixed disk slot opening portion being contiguous;

a movable disk having an opening passing through the movable disk with a first arcuate wall cooperating with a second arcuate wall spaced a substantially constant distance from said movable disk first arcuate wall to define a slot opening portion having a substantially constant width and cooperating with opposite walls to define an angular segment opening portion, the movable disk segment opening portion being contiguous with the movable disk slot opening portion;

said movable disk being superimposed on said fixed disk with said movable disk slot opening portion lying adjacent said fixed disk slot opening portion such that rotation of said movable disk results first in superiposition of said movable disk slot opening portion and said fixed disk slot opening portion and further movement of said movable disk results in superposition of said movable-disk segment opening portion and said fixed disk segment opening thereby irst establishing a small amount of flow through said slot opening portions and gradually increasing any flow of delivered liquid as said segment openings are brought into coincidence with the flow of liquid reaching a maximum when the two segment openings are coinciding.

2. A pair of ceramic disks according to claim 1, wherein the ratio between the angular length of each segment opening portion to the angular length to each slot opening portion is 2:

1.

3. A pair of ceramic disks according to claim 2 wherein each said arcuate walls extends substantially 180°

.