Title:
SLEEVE HOLE FORMER FOR CONCRETE SLAB
Document Type and Number:
Japanese Patent JP3574940
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide such a former as being capable of accurately making a pipe joint insertion sleeve hole during placing a concrete slab in drain pipe joint installation construction without doing troublesome work.
SOLUTION: A sleeve hole former 1 for a concrete slab has an approximately reverse truncated cone shaped body 2 molded in a hollow shape, protrusions formed on the body 2 and steps 4 formed below the body 2. A cylindrical sleeve void pipe 11 is fitted to the steps 4 and fixed to a form 6 via a fixed leg 7 and a center lid 12, ant after concrete is hardened the sleeve hole former 1 is removed and then the form 6 and the void pipe 11 are removed in sequence from the concrete slab. The sleeve hole former 1 and the void pipe 11 are transferred to the concrete slab. The concrete slab C is placed.
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| JPS6229670 | FORMATION OF SURFACE PATTERN OF CONCRETE |
Inventors:
Seizo Kojima
Yozo Kako
Yozo Kako
Application Number:
JP12878996A
Publication Date:
October 06, 2004
Filing Date:
May 23, 1996
Export Citation:
Assignee:
Tokuatsu Kojima
International Classes:
E04G9/10; E04G15/06; (IPC1-7): E04G15/06
Domestic Patent References:
| JP4082233U |
Attorney, Agent or Firm:
Kentaro Iida
Akio Iida
Akio Iida
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