Lubricated wedge gate valve

• US 3,349,789 A
• Filed: 05/24/1965
• Issued: 10/31/1967
• Est. Priority Date: 05/24/1965
• Status: Expired due to Term

• Current Assignee: Gray Tool Company
• Original Assignee: Elwood K. Pierce Jr, Robert L. Crain
• Inventors: Crain, Robert L., Pierce, Elwood K. Jr.
• Application Number:
  US04/458,190
• Time in Patent Office: 890 Days
• US Class Current: 137/246.22
• CPC Class Codes: F16K 3/184 by means of cams
• CPC Class Codes: F16K 3/186 by means of cams of wedge from
• CPC Class Codes: F16K 3/314 Forms or constructions of slides; Attachment of the slide to the spindle
• CPC Class Codes: F16K 3/36 Features relating to lubrication
• CPC Class Codes: Y10T 137/4442 External pressure
• CPC Class Codes: Y10T 137/7036 Jacketed

Claims

1. A GATE VALVE COMPRISING:

A BODY, SAID BODY HAVING MEANS DEFINING A FLOW PASSAGEWAY THERETHROUGH, MEANS DEFINING A GATE RECEIVING CHAMBER IN SAID BODY INTERSECTING SAID PASSAGEWAY INTERMEDIATE THE ENDS THEREOF AND TRANSVERSE TO THE LONGITUDINAL AXIS OF SAID PASSAGEWAY;

MEANS DEFINING TWO ANNULAR RECESSES IN SAID BODY, EACH CIRCUMFERENTIALLY SURROUNDING A JUNCTURE OF SAID PASSAGEWAY AND SAID BODY;

AN ANNULAR VALVE SEAT RECEIVED IN EACH OF SAID RECESSES;

MEANS DEFINING AN OPENING THROUGH SAID BODY INTO SAID CHAMBER AT ONE END OF THE CHAMBER;

A GATE INCLUDING A PAIR OF OPPOSED GATE PLATES RECEIVED IN SAID CHAMBER THROUGH SAID OPENING AND SPACED FROM ONE ANOTHER IN THE DIRECTION OF THE LONGITUDINAL AXIS OF SAID PASSAGEWAY;

GATE EXPANDER MEANS INCLUDING A PAIR OF ELONGATED LEGS DEPENDING INTO SAID CHAMBER, ONE ADJACENT AND BETWEEN EACH OF THE OPPOSED GATE PLATES ADJACENT THE LATERAL EDGES OF EACH GATE PLATE;

MEANS DEFINING A DOWNWARDLY WIDENING WEDGE ON EACH OF SAID ELONGATED LEGS ADJACENT THE LOWER EXTENT THEREOF;

MEANS DEFINING A FLOW PASSAGEWAY THROUGH SAID GATE;

MEANS FOR MOVING SAID GATE TRANSVERSELY OF THE BODY FLOW PASSAGEWAY TO SELECTIVELY ALIGN THE BODY AND GATE FLOW PASSAGEWAY IN A FIRST POSITION OF THE GATE AND TO CLOSE OFF THE BODY FLOW PASSAGEWAY IN A SECOND POSITION OF THE GATE;

MEANS ON SAID GATE SLIDABLY ENGAGING EACH OF SAID LEGS, SAID LASTMENTIONED MEANS ENGAGING SAID WEDGES AS SAID GATE IS MOVED FROM SAID FRIST POSITION TO SAID SECOND POSITION THEREBY FORCING SAID GATE PLATES AWAY FROM ONE ANOTHER AND INTO SEALING ENGAGEMENT WITH SAID SEATS.

14. A GATE VALVE AS SET FORTH IN CLAIM 1 WHEREIN EACH ANNULAR VALVE SEAT INCLUDES MEANS DEFINING AN ANNULAR RADIALLY DIRECTED AXIALLY INNER END SURFACE, MEANS DEFINING AN AXIALLY EXTENDING OUTER PERIPHERAL SURFACE AND MEANS DEFINING AN AXIALLY DIRECTED CENTRAL PASSAGEWAY THROUGH