Title:
PISTON FOR CONCRETE CYLINDER OF CONCRETE PUMP
Document Type and Number:
Japanese Patent JP2015081549
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a piston for a concrete cylinder of a concrete pump capable of improving sealing performance as a structure in which grease supplied to the concrete piston is easily held in the periphery of the piston, and capable of suppressing abrasion or wear of the cylinder or packing.SOLUTION: A clearance 16 for filling grease G is formed along an outer periphery of a piston 6 held by a pair of piston packings 14a and 14b, and a U-packing 17 having an annular groove 19 is circumferentially formed at least on a piston base end side of the clearance 16. The U-packing 17 is disposed in such a manner that an outer peripheral surface thereof is slidably abutted to an inner wall surface of a cylinder 3 and an opening side of the groove 19 faces the clearance 16. When the piston 6 is advanced so as to pump ready-mixed concrete C, the grease G filled in the clearance 16 is held by the U-packing 17, and abrasion and wear of the cylinder 3 or the piston packings 14a and 14b can be suppressed.
More Like This:
| JP2006183620 | RECIPROCATING PUMP |
Inventors:
INADA YOSHIAKI
Application Number:
JP2013219486A
Publication Date:
April 27, 2015
Filing Date:
October 22, 2013
Export Citation:
Assignee:
NIKKO KK
International Classes:
F04B53/14; F04B15/02
Domestic Patent References:
| JPS5890383U | 1983-06-18 | |||
| JP2003074514A | 2003-03-12 | |||
| JPS51136503U | 1976-11-04 | |||
| JPS5117803U | 1976-02-09 | |||
| JPH0189667U | 1989-06-13 | |||
| JPS6164425U | 1986-05-01 | |||
| JPS50246Y1 | 1975-01-07 | |||
| JPH1030577A | 1998-02-03 | |||
| JPH04209976A | 1992-07-31 |
Previous Patent: SADDLE-RIDING TYPE VEHICLE
Next Patent: EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE
Next Patent: EXHAUST EMISSION CONTROL DEVICE OF INTERNAL COMBUSTION ENGINE