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Machine translation
1. (WO1979000563) PAVEMENT PLANING METHOD AND APPARATUS
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1979/000563    International Application No.:    PCT/US1979/000042
Publication Date: 23.08.1979 International Filing Date: 29.01.1979
IPC:
E01C 23/085 (2006.01), E01C 23/12 (2006.01), E02F 5/32 (2006.01), E21C 27/46 (2006.01)
Applicants:
Inventors:
Priority Data:
873249 30.01.1978 US
Title (EN) PAVEMENT PLANING METHOD AND APPARATUS
(FR) PROCEDE ET MACHINE POUR APLANIR UN REVETEMENT
Abstract: front page image
(EN)Asphalt or concrete pavement is removed from a road bed by an elongated cutter blade (94) that extends in a downward and forward direction along a cutting plane to a cutting edge. The cutting plane forms an acute angle of between 450 and 550 with the surface of the pavement. The cutter blade is intermittently driven with a force parallel to the cutting plane in the forward direction while the cutting edge penetrates the pavement to drive the cutter blade incrementally in a forward direction and plane on the pavement in a chisel-like manner. A source of vibrations (56, 56") is connected to one end of plural spaced apart resonant beams (54, 54"). At the other end, the beams drive the cutter blade. The source produces a reciprocating force that is transmitted to the blade by the beams each of which has an output that reciprocates about a neutral position responsive to the force of the source. A continuous unidirectional force is applied to the source by a tool carrier (44). The blade advances intermittently along a work path through the pavement responsive to the continuous unidirectional force and the reciprocating force. A gap is held between the neutral output position of the beams and the blade when the blade is unable to advance through the pavement responsive to the continuous unidirectional force and the reciprocating force. Specifically, the force of the source is sufficiently large relative to the unidirectional force to overcome the latter, and to drive the tool holder back away from the blade when the blade is unable to advance along the work path, thereby establishing a protective gap. Cessation of resonance is prevented when the blade encounters an immovable object by establishing the protective gap in the described manner.
(FR)L"asphalte ou le revetement en beton est enleve de l"empierrement d"une route a l"aide d"une lame de coupe allongee (94) qui s"etend vers le bas et vers l"avant le long d"un plan de coupe jusqu"a une arrete tranchante. Le plan de coupe forme un angle aigu, compris entre 45 et 55 , avec la surface du revetement. La lame de coupe est poussee de facon intermittente vers l"avant avec une force parallele au plan de coupe, pendant que l"arete tranchante penetre dans le revetement, pour faire avancer la lame de coupe par des petits deplacements et raboter le revetement a la maniere d"un burin. Une source de vibrations (56, 56") est reliee a une extremite d"une pluralite de fleaux resonants (54, 54") espaces. L"autre extremite des fleaux actionne la lame de coupe. La source produit une force alternative qui est transmise a la lame par les fleaux chacun, d"entre eux fournissant une force qui alterne autour d"une valeur nulle en reponse a la force de la source. Une force continue unidirectionnelle est appliquee a la source par un support (44). La lame avance de facon intermittente le long d"un chemin de travail a travers le revetement en reponse a la force continue unidirectionnelle et a la force alternative. Lorsque la lame n"est pas en mesure d"avancer a travers le revetement en reponse a la force continue unidirectionnelle et a la force alternative, un intervalle est maintenu entre la position neutre des fleaux et la lame. En particulier, la force de la source est suffisamment grande par rapport a la force unidirectionnelle pour surmonter cette derniere et eloigner le support de la lame lorsque celle-ci n"est pas en mesure d"avancer le long du chemin de travail, ceci par l"etablissement d"un intervalle de protection. L"arret de la resonance est empeche, lorsque la lame rencontre un objet inamovible, par l"etablissement de l"intervalle de protection.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)