Spherical valve

Details Spherical valve Spherical valve

2000-09-27

2001-03-13

Shaver, Kevin (Department: 3754)

Valves and valve actuation

Rotary valves

Ball valve

C251S315010, C251S315160

Reexamination Certificate

active

06199824

ABSTRACT:

BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a valve, and more particularly to a spherical valve.
2. Description of Related Art
As shown in
FIG. 1
, a prior art spherical valve
40
has a tubular body
41
which is provided in the interior with a threaded portion
42
, a rotary shaft
1
, a ball
2
, a washer
3
, and an annular lock member
43
. The spherical valve
40
is defective in design because it is fastened to a pipe in a specific direction, and because it cannot be easily detached from the pipe for maintenance work. As shown in
FIG. 2
, another prior art ball valve
50
has a tubular body
51
which is provided in the interior thereof with a threaded port
52
, a rotary shaft
1
, a ball
2
, and a washer
3
. A threaded tubular member
53
is fastened to the threaded port
52
. As compared with the prior art spherical valve
40
, the prior art ball valve
50
can be fastened to a pipe with a relative ease. However, the ball valve
50
cannot be easily maintained or replaced. As shown in
FIG. 3
, a flanged ball valve
60
of the prior art is formed of a primary tubular member
61
and a secondary tubular member
62
, which make the repairing and the replacing of the flanged ball valve
60
rather complicated and time-consuming. As shown in
FIG. 4
, a three-piece ball valve
70
of the prior art has a main body
71
, which is fastened to a pipe by two auxiliary valve tubes
72
and is unfastened the pipe between the two auxiliary valve tubes
72
, thereby making the assembly work cumbersome. In addition, the ball valve
70
is complicated in construction and is expensive.
BRIEF SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a spherical valve free of the deficiencies of the prior art ball valves described above.
The features and the advantages of the present invention will be readily understood upon a thoughtful deliberation of the following detailed description of the present invention with reference to the accompanying drawings.


REFERENCES:
patent: 3118650 (1964-01-01), Cooper et al.
patent: 3345032 (1967-10-01), Rawstron
patent: 3370612 (1968-02-01), Holl
patent: 3949965 (1976-04-01), Sharples et al.
patent: 5036883 (1991-08-01), McHugh
patent: 5531244 (1996-07-01), Siver

Affiliated with

Also associated with

Rating

Spherical valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Spherical valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spherical valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2491589