Title:
CUSHIONING MATERIAL FOR CONCRETE PROPELLING PIPE
Document Type and Number:
Japanese Patent JP3481692
Kind Code:
B2
Abstract:
PURPOSE: To facilitate positioning of ring-shaped cushion materials in the case of installation by dividing the ring-shaped cushion materials into a plurality of small sections with expanded polystyrene to form, and at the same time, providing at least one projection to the circumference.
CONSTITUTION: At least one projection is provided on the circumference of each of divided cushion materials 4 provided to joints of a propelling pipe 3. A radial width X including the projection 1 is smaller than the thickness of the propelling pipe 3, and if necessary, a fitting section of a dovetail slot shaped unevenness is provided to the side, and adjacent cushion materials 4 are fitted to each other to prevent the slippage. The cushion material projection 1 is brought into contact with the inside of an imbedded collar 5 to position and is fixed. By the constitution, cushion material mounting work efficiency can be promoted.
Inventors:
Yukio Umezawa
Shigeo Udagawa
Shigeo Udagawa
Application Number:
JP23607494A
Publication Date:
December 22, 2003
Filing Date:
September 06, 1994
Export Citation:
Assignee:
Sekisui Plastics Co., Ltd.
International Classes:
E21D9/06; F16L1/024; F16L57/00; (IPC1-7): E21D9/06
Domestic Patent References:
| JP280788A | ||||
| JP6026885A | ||||
| JP60220285A | ||||
| JP62236994A | ||||
| JP362192U | ||||
| JP618320B1 |
Attorney, Agent or Firm:
Keisuke Watanabe (1 person outside)
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