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US 6,205,864 B1Granted
Gyratory shear press
AssigneeLaboratoire Central des Ponts et Chayssees
InventorsHugues Vialletel, Sylvain Gallier, Jacky Gaschet, Francis Moutier
Life of this patent
Estimating the term…
Abstract
This invention relates to a gyratory shear press of which the compression means are disposed in the lower part of the chassis and of which the gyration means are provided in the upper part of the chassis which is in the form of a casing. The mould is introduced in the casing via an opening provided in the upper wall of the casing and adapted to be closed by a lid. The gyration means comprise two concentric sleeves separated from the casing and the mould by bearings. The inner sleeve is mounted to oscillate in the outer sleeve and is inclined by means of a vernier.
Claims15
A gyratory shear press for compacting samples of compaction materials, comprising:
- a chassis,
- a cylindrical mould having an X axis and being adapted to receive a sample interposed between an upper end and a lower end, said upper end and said lower end being maintained parallel to each other;
- means for compressing the sample, borne by said chassis and adapted to apply a constant force on one of said ends of said mould along a Y axis perpendicular to said ends;
- means for inclining the X axis of the mould with respect to the Y axis;
- gyration means adapted to impart a gyratory movement of the X axis of the mould about the Y axis;
- means for controlling the compression means and the gyration means;
- and
- means for measuring a height of the sample between the ends and a shearing force of the sample as a function of a number of gyrations of the X axis;
- the chassis comprising in its upper part a casing whose rigidity is constant over 360° and which presents, in its upper wall, an opening adapted to be closed by a lid intended to serve as a bearing for the upper end of the mould, and, in its lower wall, an orifice for the passage of a mobile element of the compression means, which is in abutment on the lower end of the mould;
- the gyration means comprising an outer cylindrical sleeve having a Y axis and being mounted to rotate in the casing via bearings, an inner cylindrical sleeve having an X axis being mounted to rotate about a counter-mould having an X axis and being intended to receive the mould, via bearings, and means for driving the outer cylindrical sleeve in rotation, said drive means being borne by the casing, the inner cylindrical sleeve being disposed inside the outer cylindrical sleeve and being mounted to oscillate thereon so as to be able to pivot about a Z axis perpendicular to the X and Y axes and lying substantially in the plane of the upper end;
- and
- the means for inclining the X axis of the mould with respect to the Y axis comprising an angle-adjusting system interposed between the outer cylindrical sleeve and the inner cylindrical sleeve and lying in a median plane perpendicular to the Z axis, the angle adjusting system pivoting the mould about a point disposed substantially in the plane of the upper end of the mould.
9 more elements
A gyratory shear press for compacting samples of compaction materials, comprising:
- a chassis, a lower portion of the chassis comprising a lower plate, an upper plate on which a casing is fixed and a plurality of columns disposed substantially parallel to the Y-axis and connecting the upper plate to the lower plate;
- a cylindrical mould having an X axis and being adapted to receive a sample interposed between an upper end and a lower end, said upper end and said lower end being maintained substantially parallel to one another;
- means disposed on the lower plate for compressing the sample and being adapted to apply a constant force on one of said ends of said mould along a Y axis which is generally perpendicular to said ends, the compression means comprising an endless screw driven by second drive means and a sheath driven in translation along the Y axis by the endless screw, a head of the endless screw being in abutment with the lower end of the mould, said sheath being guided along the Y axis by rollers cooperating with the columns and traversing an opening in the upper plate through a bushing;
- means for inclining the X axis of the mould with respect to the Y axis, the inclining means comprising an angle-adjusting system;
- gyration means adapted to impart a gyratory movement of the X axis of the mould about the Y axis;
- and
- means for controlling the compression means and the gyration means.
4 more elements
A gyratory shear press for compacting samples of compaction materials, comprising:
- a cylindrical mould having an X axis and being adapted to receive a sample interposed between an upper end and a lower end, said upper end and lower end being maintained substantially parallel to one another;
- means for compressing the sample and being adapted to apply a constant force on one of said ends of said mould along a Y axis which is generally perpendicular to said ends;
- means for inclining the X axis of the mould with respect to the Y axis, the inclining means comprising an angle adjusting system and a vernier;
- gyration means adapted to impart a gyratory movement of the X axis of the mould about the Y axis;
- means for controlling the compression means and the gyration means;
- and
- means for measuring a height of a sample between the ends and a shearing force of the sample as a function of a number of gyrations of the X axis, said measuring means comprising a shear sensor disposed inside the angle adjusting system.
4 more elements
Dependencies are inferred from the claim text.