EP 0299871 B1 19910904 - EXCAVATING DEVICE FOR DIGGING TRENCHES IN THE GROUND
Title (en)
EXCAVATING DEVICE FOR DIGGING TRENCHES IN THE GROUND
Publication
Application
Priority
FR 8710069 A 19870716
Abstract (en)
[origin: JPS6433325A] PURPOSE: To render the thickness of a support plate thin by attaching boring drums substantially vertically to both the surface of a support plate having curved grooves, and also attaching them in order to rotate about an axis being substantially at right angles with respect to the support plate. CONSTITUTION: A support unit 4 secured to a frame 1 comprises a base plate 5, a support plate 6 and sleeve-like attachment table 7. Also, boring drums 2a, 2b rotate about an axis 9 being substantially at right angles with respect to the support plate, and the drum 2a has a bite 10a projecting from the drum edge in the lateral direction at a plane surface 8 side; in the same manner, the drum 2b has a bite 10b projecting from the drum edge 11b. The plate 6 has curved grooves 12a, 12b through which the tip ends of the bites passe when the bites 10a, 10b rotate. The edge of the diameter directional outside of the bite 10a lies at a distance (ra) from the axis 9, and the diameter directional outside of the bite 10b lies at a distance (rb) that is smaller than (ra).
IPC 1-7
IPC 8 full level
E02F 5/08 (2006.01); E02F 3/20 (2006.01); E02F 3/22 (2006.01); E02F 5/02 (2006.01)
CPC (source: EP US)
E02F 3/205 (2013.01 - EP US); E02F 3/22 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE ES GB IT LI NL SE
DOCDB simple family (publication)
EP 0299871 A1 19890118; EP 0299871 B1 19910904; AT E66987 T1 19910915; CA 1297503 C 19920317; CY 1716 A 19940506; DE 299871 T1 19890803; DE 3864616 D1 19911010; ES 2007580 A4 19890701; ES 2007580 B3 19920301; FR 2618172 A1 19890120; FR 2618172 B1 19891117; HK 59593 A 19930625; JP H0657961 B2 19940803; JP S6433325 A 19890203; SG 46393 G 19930625; US 4844549 A 19890704
DOCDB simple family (application)
EP 88401831 A 19880713; AT 88401831 T 19880713; CA 572161 A 19880715; CY 171694 A 19940506; DE 3864616 T 19880713; DE 88401831 T 19880713; ES 88401831 T 19880713; FR 8710069 A 19870716; HK 59593 A 19930617; JP 17687688 A 19880715; SG 46393 A 19930415; US 21958688 A 19880715