Valves and valve actuation – Rotary valves – Ball valve
Reexamination Certificate
2000-05-26
2001-12-04
Shaver, Kevin (Department: 3754)
Valves and valve actuation
Rotary valves
Ball valve
C137S015220
Reexamination Certificate
active
06325357
ABSTRACT:
BACKGROUND OF THE INVENTION
1) Field of the Invention
The invention, a kind of improved three-way valve structure is to install a ball valve inside a three-way valve majority. The ball valve is installed inside the valve majority by using a guiding bar. After a washer is placed on a turning bar set, it is installed in the valve majority. The clip groove on a ball valve fits in the clip base on a turning bar for positioning. Thus assembly is completed and convenient assembly is achieved.
2) Description of the Prior Art
Please refer
FIG. 1
, an isometric drawing for three-way valve elements of prior art. As shown in the figure, a three-way valve is a three-way connected tubular object. For each of two sets of control valve majorities
10
, the assembly elements equip a spherical ball valve
14
. In the spherical center of the valve, there is penetration opening
16
with clip bar
15
in the top for positioning and stopper
17
together with positioning ring
18
in a conduit. After ball valve
14
is inserted and fixed inside valve majorities
10
, washer
13
is placed from the top and turning bar
11
is equipped. After the completion of all the major elements are assembled, screw
19
is driven to fix turning bar
11
on ball valve
14
for proper fixture.
The process of assembly positioning for ball valve
14
is illustrated as follows: (Please refer
FIG. 2-A
,
FIG. 2-B
, and FIG.
2
-C: an exploded assembly drawing for a ball valve of prior art in an open state.)
First, please refer
FIG. 2-A
. As shown in the figure, the issue to be understood is that ball valve
14
must be inserted in a transversal way because the total length of ball valve
14
is greater than the diameter of a conduit inside valve majority
10
. Next, please refer
FIG. 2-B
. As shown in the figure, after ball valve
14
is inserted in the rear end of the conduit on an upper opening, slowly erect ball valve
14
according to the penetration angle and upper space. Then, please refer
FIG. 2-C
. After ball valve
14
is erected, place washer
13
and turning bar
11
accordingly. Finally, drive screw
19
for positioning and the assembly process is completed.
On the basis of assembly process of ball valve for three-way valve of prior art, it can be concluded as follows:
Because the total length of ball valve
14
is greater than the diameter of a conduit, ball valve
14
must be inserted to the conduit in a transversal way. To erect ball valve
14
, no tool can be applied for the movement of angle change, thus ball valve
14
must be inserted by hand operation. After the placement of ball valve
14
, clip bar
15
on ball valve
14
penetrates a conduit by inclined push and is fixed with screw
19
for fixture. Although the assembly process is not complicated and ball valve
14
can not be effectively held with by tool, the assembly is inconvenient.
Due to the above defectives for inconvenient assembly process for prior three-way valves, the inventor realized that there is a need for further study of product improvement and researched to overcome the disadvantages of prior products. After numerous experiments, the invention is eventually developed.
The main design concept for the invention is to improve the majority of a ball valve to enhance assembly efficiency by the aid of tool.
The followings are brief description for optimal embodiments of the invention for committee's better understanding in the structural assembly and operations of the invention.
REFERENCES:
patent: 2788016 (1957-04-01), Scherer
patent: 3380708 (1968-04-01), Scaramucci
patent: 5102098 (1992-04-01), Daghe et al.
patent: 6041806 (2000-03-01), Maichel
Bonderer David A
Dougherty & Troxell
Shaver Kevin
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