JPS5489302A - Throttling concrete pump - Google Patents

Throttling concrete pump

Info

Publication number
JPS5489302A
JPS5489302A JP15812777A JP15812777A JPS5489302A JP S5489302 A JPS5489302 A JP S5489302A JP 15812777 A JP15812777 A JP 15812777A JP 15812777 A JP15812777 A JP 15812777A JP S5489302 A JPS5489302 A JP S5489302A
Authority
JP
Japan
Prior art keywords
tube
rollers
rupture
lamp
concrete pump
Prior art date
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.)
Granted
Application number
JP15812777A
Other languages
Japanese (ja)
Other versions
JPS5821118B2 (en
Inventor
Daisuke Nanun
Masatoshi Yoshida
Masaaki Inoue
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyokuto Kaihatsu Kogyo Co Ltd
Toyo Tire Corp
Original Assignee
Toyo Tire and Rubber Co Ltd
Kyokuto Kaihatsu Kogyo Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyo Tire and Rubber Co Ltd, Kyokuto Kaihatsu Kogyo Co Ltd filed Critical Toyo Tire and Rubber Co Ltd
Priority to JP52158127A priority Critical patent/JPS5821118B2/en
Publication of JPS5489302A publication Critical patent/JPS5489302A/en
Publication of JPS5821118B2 publication Critical patent/JPS5821118B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Reciprocating Pumps (AREA)

Abstract

PURPOSE: To reduce the rupture of a tube during the operation of a concrete pump, by detecting from outside the state of wear inside the tube which is pressed by rotary rollers.
CONSTITUTION: A tube 2 fitted along inside of a pump casing 1 provides the pumping action by means of the pressuring force of a pair of rollers 10, 10' revolving around a rotary shaft 8 and the retaining force of the tube itself. A closed-loop electric conductor 11 is buried in the wall of the tube at a position corresponding to at least either of before a position where the rollers 10, 10' begin separating from the tube 2 or a position where the rollers begin pressing the tube 2, for example, between rubber lining and a reinforcing layer, and a lamp 14 and power source 15 are connected in series in the closed circuit. When the tube 2 is worn dowm and the conductor 11 is cut off, the lamp 14 is turned off to alarm the rupture.
COPYRIGHT: (C)1979,JPO&Japio
JP52158127A 1977-12-27 1977-12-27 Squeezing concrete pump Expired JPS5821118B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP52158127A JPS5821118B2 (en) 1977-12-27 1977-12-27 Squeezing concrete pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP52158127A JPS5821118B2 (en) 1977-12-27 1977-12-27 Squeezing concrete pump

Publications (2)

Publication Number Publication Date
JPS5489302A true JPS5489302A (en) 1979-07-16
JPS5821118B2 JPS5821118B2 (en) 1983-04-27

Family

ID=15664870

Family Applications (1)

Application Number Title Priority Date Filing Date
JP52158127A Expired JPS5821118B2 (en) 1977-12-27 1977-12-27 Squeezing concrete pump

Country Status (1)

Country Link
JP (1) JPS5821118B2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59153526U (en) * 1983-03-30 1984-10-15 シャープ株式会社 liquid crystal display element
JPS59156225U (en) * 1983-04-04 1984-10-20 シャープ株式会社 liquid crystal display element
JPS60203919A (en) * 1984-03-28 1985-10-15 Sharp Corp Liquid crystal display device
JPS6216926U (en) * 1985-07-12 1987-01-31
JPS632922U (en) * 1986-06-24 1988-01-09
JPS6319822U (en) * 1987-06-17 1988-02-09

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4416141Y1 (en) * 1966-07-09 1969-07-11
JPS4532959Y1 (en) * 1966-08-08 1970-12-15
JPS4715830U (en) * 1971-03-22 1972-10-24

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4416141Y1 (en) * 1966-07-09 1969-07-11
JPS4532959Y1 (en) * 1966-08-08 1970-12-15
JPS4715830U (en) * 1971-03-22 1972-10-24

Also Published As

Publication number Publication date
JPS5821118B2 (en) 1983-04-27

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