JPH0479236U - - Google Patents

Info

Publication number

JPH0479236U

JPH0479236U JP12314490U JP12314490U JPH0479236U JP H0479236 U JPH0479236 U JP H0479236U JP 12314490 U JP12314490 U JP 12314490U JP 12314490 U JP12314490 U JP 12314490U JP H0479236 U JPH0479236 U JP H0479236U

Authority

JP

Japan

Prior art keywords

diaphragm

center

chamber

communication hole

recess

Prior art date

1990-11-22

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Pending

Links

• Espacenet
• Global Dossier
• Discuss

• 239000007788 liquid Substances 0.000 claims description 2
• 230000001681 protective effect Effects 0.000 claims description 2
• 230000002093 peripheral effect Effects 0.000 claims 1
• 238000010586 diagram Methods 0.000 description 3
• 239000012212 insulator Substances 0.000 description 1
• 238000005259 measurement Methods 0.000 description 1
• 239000011800 void material Substances 0.000 description 1