Ball valve

• US 6,488,261 B1
• Filed: 03/11/2002
• Issued: 12/03/2002
• Est. Priority Date: 02/21/2001
• Status: Expired due to Fees

• Current Assignee: Jen-Chieh Lee
• Original Assignee: Jen-Chieh Lee
• Inventors: Lee, Jen-Chieh
• Primary Examiner(s): Yuen, Henry C.
• Assistant Examiner(s): Bastianelli, John
• Application Number:
  US10/096,026
• Time in Patent Office: 267 Days
• Field of Search: 251/174, 251/315.1, 251/315.11, 251/315.12, 251/315.14, 251/180, 251/310, 251/311
• US Class Current: 251/174
• CPC Class Codes: F16K 5/061 knee-joint

Abstract

A ball valve includes a valve body, a cap, a disk spring, a driven member, and a spherical body. The disk spring and the driven member are disposed in the cap such that the driven member is urged by the disk spring to displace, thereby causing the driven member to push PTFE washers to come in contact with the spherical body.

Claims

1. A ball valve comprising:

a valve body comprised of an interior which is divided by an annular rib into an annular seat and a chamber, said valve body comprising;

at one end, a first threaded pipe extending therefrom such that said threaded pipe is in communication with said chambe via said annular seat and, at another end, a second threaded pipe in communication with said chamber, said valve body further comprising a shaft tube in communication with said chamber, a rotary shaft pivoted to said shaft tube, and a plurality of lugs;

a cap joined with said chamber in conjunction with a seal ring and comprised of a receiving portion corresponding in location to said annular seat, and a plurality of lugs corresponding in number and location to said lugs of said valve body;

a disk spring disposed in said receiving portion of said cap;

a driven member disposed in said receiving portion of said cap and comprised of an annular clamp seat;

a spherical body comprised of an L-shaped channel and disposed between a first PTFE washer which is retained in said annular clamp seat, and a second PTFE washer which is retained in said annular seat of said valve body, said spherical body provided in the outer surface with a retaining slot for retaining a protrusion of said rotary shaft whereby said PTFE washers are pushed by said driven member to come in contact with said spherical body at the time when said driven member is urged by said disk spring.

2. The ball valve as defined in claim 1, wherein said driven member is comprised of a driven piece which is disposed between said disk spring and said first PTFE washer.