The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 23, 1977
Filed:
Jun. 03, 1976
Klaus Gerd Hoes, Oberlethe, DT;
Gerold Wobken, Elsfleth, DT;
Firma Klaus-Gerd Hoes, Oldenburg, DT;
Abstract
A trench cutter for excavating trenches and for laying water pipes and drainage pipes into trenches consisting of a travelling cutter chain with a jib supporting the cutter chain, the jib being pivotable in a vertical plane. A pipe laying duct is included for entering the excavation and sliding on the bottom of the excavation trench, the laying duct being pivotably connected to the jib. A duct guide arm extends parallel to the back surface of the pipe laying duct for supporting the duct vertically so that it faces the cutter chain. A plurality of parallel guide rollers have one end pivotably connected to the duct guide arm and their opposite end connected to the outward drive shaft of the trench cutter. The drive shaft of the trench cutter is pivotably connected to the free end of the jib. Guide rod linkages are connected to at least one work cylinder in order to adjust the angle of inclination between the cutter chain and the duct to change the clearance between the duct and the chain so that the duct can describe a curved path to permit the lower edge of the duct to be substantially tangential to the outer turning radius of the lower cutter chain.