JPS6346546Y2 - - Google Patents

Info

Publication number

JPS6346546Y2

JPS6346546Y2 JP18312184U JP18312184U JPS6346546Y2 JP S6346546 Y2 JPS6346546 Y2 JP S6346546Y2 JP 18312184 U JP18312184 U JP 18312184U JP 18312184 U JP18312184 U JP 18312184U JP S6346546 Y2 JPS6346546 Y2 JP S6346546Y2

Authority

JP

Japan

Prior art keywords

expansion

main body

rotating member

expanding

contraction

Prior art date

1984-11-30

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.)

Expired

Links

• Espacenet
• Global Dossier
• Discuss

• 230000008602 contraction Effects 0.000 claims description 27
• 210000000078 claw Anatomy 0.000 claims description 12
• 230000008878 coupling Effects 0.000 claims description 8
• 238000010168 coupling process Methods 0.000 claims description 8
• 238000005859 coupling reaction Methods 0.000 claims description 8
• 238000009412 basement excavation Methods 0.000 description 4
• 238000000034 method Methods 0.000 description 4
• 239000004568 cement Substances 0.000 description 2
• 238000010276 construction Methods 0.000 description 2
• 239000008267 milk Substances 0.000 description 2
• 210000004080 milk Anatomy 0.000 description 2
• 235000013336 milk Nutrition 0.000 description 2
• 239000004570 mortar (masonry) Substances 0.000 description 2
• 239000002689 soil Substances 0.000 description 2
• 229910000831 Steel Inorganic materials 0.000 description 1
• 230000001112 coagulating effect Effects 0.000 description 1
• 238000005553 drilling Methods 0.000 description 1
• 239000004519 grease Substances 0.000 description 1
• 238000012423 maintenance Methods 0.000 description 1
• 239000000463 material Substances 0.000 description 1
• 210000002445 nipple Anatomy 0.000 description 1
• 239000010959 steel Substances 0.000 description 1