Fluid handling – Systems – Programmer or timer
Reexamination Certificate
2001-08-22
2003-08-19
Lee, Kevin (Department: 3753)
Fluid handling
Systems
Programmer or timer
C251S309000
Reexamination Certificate
active
06607008
ABSTRACT:
TECHNICAL FIELD
The present invention relates to pulsating vibration air generation means for generating pulsating vibration air used for removing extra powder of tablets, pneumatically transporting powdered material, and vibrating mechanical members.
BACKGROUND ART
For example, pulsating vibration air generation means in which an electromagnetic valve is interposed in a pneumatic transport pipe and compressed air generation means (air source) such as a blower is connected to one end of the pneumatic transport pipe has been already known.
According to such a pulsating vibration air generation means, compressed air is supplied into the pneumatic transport pipe from one end thereof by driving the compressed air generation means (air source) and pulsating vibration air of positive pressure is generated between the position where the electro magnetic valve of the pneumatic transport pipe is provided and the other end thereof by opening and closing the electromagnetic valve.
Further, pulsating vibration air generation means in which an electromagnetic valve is interposed in a pneumatic transport pipe and air suction means (air source) such as a vacuum pump and a blower is connected to one end of the pneumatic transport pipe has been also known.
According to such a pulsating vibration air generation means, air in the pneumatic transport pipe is sucked from one end of the pneumatic transport pipe by driving the air suction means (air source) and pulsating vibration air of negative pressure is generated between the position where the electromagnetic valve is provided and the other end of the pneumatic transport pipe by opening and closing the electromagnetic valve.
However, according to the above-mentioned pulsating vibration air generation means using an electromagnetic valve, the electromagnetic valve is heated when pulsating vibration air is generated for a long time so that such means isn't suitable for means generating pulsating vibration air for a long time.
The applicants of the present invention have already proposed pulsating vibration air generation means for resolving such problems in JP-A-6-312158.
FIG. 29
shows diagrammatic configuration of the pulsating vibration air generation means disclosed in JP-A-6-312158.
The pulsating vibration air generation means
301
is provided with a cylindrical casing
302
, a rotary type valve
303
located so as to divide inside of the casing
302
into two parts, and an air source
304
such as a blower.
A wave transmission port h
301
and connection ports h
302
, h
303
are provided on a circumferential surface of the casing
302
.
A conduit (pneumatic transport pipe, not shown) is connected to the wave transmission port h
301
.
The air source
304
is provided with an air supply port h
304
and an air suction port h
305
.
A conduit T
301
is connected between the connection port h
302
provided at the circumferential surface of the casing
302
and the air supply port h
304
of the air source
304
.
A conduit T
302
is connected between the connection port h
303
provided on the circumferential surface of the casing
302
and the air suction port h
305
of the air source
304
.
Rotary drive means such as a motor (not shown) is connected to a rotary shaft
303
a
of a rotary valve
303
and the rotary valve
303
is rotated at a fixed rotational speed when the rotary drive means is driven to be rotated at a fixed speed.
Next, a method for generating pulsating vibration air at the wave transmission port h
301
using the pulsating vibration air generation means
301
is explained hereinafter. For generating pulsating vibration air at the wave transmission port h
301
, the air source
304
is driven at first.
Then air of positive pressure is delivered from the air supply port h
304
and air flow of negative pressure is generated toward the air suction port h
305
in the conduit T
302
.
When the rotary drive means (not shown) is driven to be rotated at a fixed speed together with such operation, the rotary valve
303
is rotated at a fixed rotational speed.
When the connection port h
302
and the wave transmission port h
301
are communicated by the rotary valve
303
(in this time between the connection port h
302
and the air suction port h
305
is closed by the rotary valve
303
), positive air generated by driving the air source
304
is supplied from the wave transmission port h
301
to the conduit (pneumatic transport pipe, not shown) connected to the wave transmission port h
301
.
On the other hand when the connection port h
303
and the air suction port h
305
is communicated by the rotary valve
303
(in this time between the connection port h
302
and the air supply port h
304
is closed by the rotary valve
303
), negative air flow toward the wave transmission port h
301
is generated in the conduit (pneumatic transport pipe, not shown) connected to the wave transmission port h
301
because of negative air flow directing to the air suction port h
305
.
According to the pulsating vibration air generation means
301
, the above-mentioned operations are repeated while the air source
304
is driven and the rotary valve
303
is driven and rotated so that positive pressure and negative pressure are alternately caused and pulsating vibration air is generated in the conduit (pneumatic transport pipe, not shown) connected to the wave transmission port h
301
.
Further according to the pulsating vibration air generation means
301
, pulsating vibration air is generated by the rotary valve
303
of rotary type so that such a problem that heat generation caused by driving an electromagnetic valve for a long time doesn't arise. Therefore, it is suitable for generating pulsating vibration air for a long time.
Moreover, the pulsating vibration air generation means
301
is provided with the cylindrical casing
302
and the rotary type valve
303
. As a result, there is an advantage that the apparatus can be easily large scaled in such a manner that the cylindrical casing
302
is enlarged into its diametrical direction and/or longitudinal direction and accordingly the rotary valve
303
is enlarged into its diametrical direction and/or longitudinal direction for generating large amount of pulsating vibration air.
FIG. 30
shows diagrammatic configuration of another pulsating vibration air generation means which has been disclosed in JP-A-9-75848 by the present applicants.
The pulsating vibration air generation means
401
is provided with a main body
402
including a hollow chamber R
402
having an air supply port h
402
connected to an air source
414
(compressed air generation means such as a blower in this embodiment) and a wave transmission port h
401
, a valve seat
403
provided in the hollow chamber R
402
of the main body
402
, a valve
404
for opening and closing the valve seat
403
, and a rotary cam
405
rotatably provided for opening and closing the valve
404
for the valve seat
403
.
The valve
404
has a plug
404
a.
The plug
404
a
is up and down movably and airtightly attached in a plug insertion hole h
403
provided for the main body
402
.
A rotary roller
406
is rotatably attached at the lower end of the plug
404
a.
The rotary cam
405
has an inner rotary cam
405
a
and an outer rotary cam
405
b.
A fixed concavo-convex pattern is provided on each of the inner rotary cam
405
a
and the outer rotary cam
405
b
so as to have a distance of about the diameter of the rotary roller
406
.
The rotary roller
406
is rotatably inserted between the inner rotary cam
405
a
and the outer rotary cam
405
b.
The rotary cam
405
is designed to be attached on a rotary plug
404
a
Ma of rotary drive means such as a motor (not shown).
A conduit T
401
is connected between an air source
414
and the air supply port h
402
.
A conduit (pneumatic transport pipe) T
402
is connected to the wave transmission port h
401
.
A hole shown as h
404
is, for example, a penetrating hole designed so as to communicate with atmosphere and is provided if necessary. In this embodiment, a conduit T
404
is connected with the pe
Iwase Yuji
Morimoto Kiyoshi
Murata Kazue
Yoshimoto Hirokazu
Fitzpatrick ,Cella, Harper & Scinto
Kyowa Hakko Kogyo Co. Ltd.
Lee Kevin
LandOfFree
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