EP 0428028 A1 19910522 - A poker vibrator for compacting concrete.
Title (en)
A poker vibrator for compacting concrete.
Title (de)
Innenrüttler zum Verdichten von Beton.
Title (fr)
Vibreur interne pour compacter le béton.
Publication
Application
Priority
SE 8903740 A 19891108
Abstract (en)
The present invention relates to a method, and an apparatus for carrying out the method, in internal or 'poker' vibrators intended for compacting concrete, the vibration-generating movement being imparted to the vibrators by an electric motor housed in the poker and driving an excentric mass, and in which the power, transmission from a power source to the electric motor is effected via an electric cable enclosed in a casing. According to the method, the vibrations generated by the poker vibrator are insulated exclusively to the poker itself with the aid of a vibration-insulating element mounted between the poker and the casing. The method is carried intoeffect in that the poker (1) and the casing (2) are united with a helical spring (4), or alternatively with an element of polymer material, which, in its longitudinal direction, has a central portion (4a) with a spring rate which is higher than the spring rate of the surrounding free portions (4b, 4c).
IPC 1-7
IPC 8 full level
E04G 21/08 (2006.01)
CPC (source: EP)
E04G 21/08 (2013.01)
Citation (search report)
- US 4086970 A 19780502 - KATO HIROSHI
- US 4135826 A 19790123 - HOLM HAROLD K
- US 1947941 A 19340220 - CORWILL JACKSON
- US 3782693 A 19740101 - STROHBECK G
- DERWENT'S ABSTRACT No. A79923/49, SU 899 356 (Staytsev N.A.), 27 January 1982
Designated contracting state (EPC)
DE DK ES FR GB IT NL SE
DOCDB simple family (publication)
EP 0428028 A1 19910522; FI 905520 A0 19901107; NO 904844 D0 19901107; NO 904844 L 19910510; SE 8903740 D0 19891108
DOCDB simple family (application)
EP 90121059 A 19901102; FI 905520 A 19901107; NO 904844 A 19901107; SE 8903740 A 19891108