Abstract: A rock drilling unit and method for charging drilled holes. The rock drilling unit includes a feed system for feeding initiators and rock breaking material into the drilled holes. The rock drilling unit is also provided with one or more communicating devices for communicating with the wireless initiators.

Abstract: An apparatus for injecting grouting material, a mining machine and a method of reinforcing rock surfaces by a grouting material is provided. The apparatus includes an injector head provided with a mixing device, which are both insertable into a drilled hole. The apparatus is for feeding resin mixtures having two different setting times. The injector head is connected to a fluid inlet arrangement having a common first feed line for slow and fast resin base components and a second feed line for a resin catalyst.

Abstract: A rock drilling unit and method for charging drilled holes. The rock drilling unit includes a feed system for feeding initiators and rock breaking material into the drilled holes. The rock drilling unit is also provided with one or more communicating devices for communicating with the wireless initiators.

Abstract: An optical detector device for a counter, comprising a consumption indicator, formed from a rotating disc (4) with a section called active (4A) and optical elements of the receiver and emitter types opposite the disc. The received signal from which is used to infer the number of rotations of the disc and which comprises at least two of the optical elements (6A, 6B) of one type and at least one of the optical elements (7) of the other type. The section (4A) is a reflecting section with a center angle of 45 to 225 DEG and the two optical elements of one type (6A, 6B) are emitting elements, emitting a beam of light, where the lines connecting each trace (S(6A), S(6B)) of the beams on the disc (4) to the center of the disc form an angle at the center which is not zero.

Abstract: An optical detector device for a counter, comprising a consumption indicator, formed from a rotating disc (4) with a section called active (4A) and optical elements of the receiver and emitter types opposite the disc. The received signal from which is used to infer the number of rotations of the disc and which comprises at least two of the optical elements (6A, 6B) of one type and at least one of the optical elements (7) of the other type. The section (4A) is a reflecting section with a center angle of 45 to 225 DEG and the two optical elements of one type (6A, 6B) are emitting elements, emitting a beam of light, where the lines connecting each trace (S(6A), S(6B)) of the beams on the disc (4) to the center of the disc form an angle at the center which is not zero.

Abstract: An optical detection device for a counter, comprising a consumption indicator, formed from a rotating target (4) and optical elements of the emitter type and receiver type, at least one of which is opposite the target, the received optical signal from which is used to infer the number of rotations of the disc. The above comprises at least two optical elements (6A, 6B) of one type and at least one optical element (7) of the other type. The target (4A) is an opaque disc section with a centre angle, called the first angle (?), of 45 to 225°. The two optical elements of one type (6A, 6B) are emitter elements of a beam of light, the beam of light lies outside the target (4) and the device further comprises at least one mirror (4A, 4B), reflecting each optical beam onto the target trajectory.

Abstract: The invention relates to the technical field of oscillating piston volumetric fluid meters. The meter comprises a cylindrical measuring chamber including a lateral wall (2), a bottom (1) and a lid (3), a lower cylinder (4) and an upper cylinder (5) having the same diameter, which is less than the diameter of said chamber, an inlet orifice and an outlet orifice (8) for respectively admitting fluid to and evacuating fluid from said chamber, a cylindrical piston (11) disposed eccentrically and guided kinematically in said chamber and effecting an oscillatory movement in said chamber (30) as a result of the displacement of a volume of fluid, and a fixed partition (9) between said inlet orifice and said outlet orifice (8), lying radially between said lateral wall (2) and said lower and upper cylinders (4, 5), and lying axially between said bottom (1) and said lid (3), said lateral wall (2) including a vertical cavity (16) in the vicinity of said fixed partition (9).

Abstract: The present invention relates to a system for detecting the positioning of a remote measuring module (2) placed on a fluid meter (1), a wall (2A) associated with said module being disposed close to a wall (1A) associated with the meter. According to the invention, it comprises at least a first electrically conductive element (10) fixed to said wall (1A) of the meter (1) and at least two second electrically conductive elements (20A, 20B) fixed to said wall (2A) of the module (2), and placed facing the first element (10) when the module is correctly positioned on the meter, the second elements are connected electrically to an electronics card (21), one of the second elements (20A) being a voltage-emitter electrode and the other of the second elements (20B) being a voltage-receiver electrode.

Abstract: A volumetric fluid meter has a cylindrical measuring chamber with a lateral wall, a bottom (1) and a lid (3), a lower cylinder (4) and an upper cylinder (5), having the same diameter, which is less than the diameter of the chamber. An inlet orifice and an outlet orifice (8) respectively admit fluid to and evacuate fluid from the chamber. A cylindrical piston (11) is disposed eccentrically and guided kinematically in the chamber and effects an oscillatory movement in the chamber as a result of the displacement of a volume of fluid. A fixed partition (9) between the inlet orifice and the outlet orifice, lies radially between the lateral wall and the lower and upper cylinders, and lies axially between the bottom and the lid. The meter further includes a vertical groove (17) extending at least partly along the lower and upper cylinders and is in communication with one of the inlet and outlet orifices, and is situated in the vicinity of said fixed partition.

Abstract: A reciprocating-piston type meter for measuring liquid volume comprises a meter body 2 having a measuring chamber disposed therein. In a space 11 existing between the meter body 2 and the measuring chamber 7, the meter has means 13 for creating a swirling stream of liquid and means 14 for confining particles present in the liquid.

Abstract: The invention relates to a method of measuring a force F exerted on a piece in a given direction in the presence of external pressure Pe and temperature T. According to the invention: the response Rcap of a deformation sensor to the total force exerted on the piece is measured; said external pressure Pe and said temperature T are determined; and the force F exerted on the piece in said given direction is determined by a relationship between the response of said deformation sensor (Rcap) and a polynomial function of degree n of the pressure Pe [fn(Pe)], said relationship being such that: F=K.Rcap−fn(Pe) where K is a constant determined by calibration of the sensor.

Abstract: The invention relates to the technical field of oscillating piston volumetric fluid meters. The meter comprises a cylindrical measuring chamber including a lateral wall, a bottom (1) and a lid (3), a lower cylinder (4) and an upper cylinder (5) having the same diameter, which is less than the diameter of said chamber, an inlet orifice and an outlet orifice (8) for respectively admitting fluid to and evacuating fluid from said chamber, a cylindrical piston (11) disposed eccentrically and guided kinematically in said chamber and effecting an oscillatory movement in said chamber as a result of the displacement of a volume of fluid, and a fixed partition (9) between said inlet orifice and said outlet orifice, lying radially between said lateral wall and said lower and upper cylinders, and lying axially between said bottom and said lid.

Abstract: A meter, in particular a fluid meter, having a meter body provided with a flow rate measuring device, a counter mounted on the meter body and provided in a top portion with a display for displaying the quantity of fluid that has been consumed, and in a bottom portion with a converter device for converting the fluid flow rate into the quantity of fluid that has been consumed, and fraud indicator assembly associated with the top portion. A portion of the fraud indicator assembly being designed to be partially or totally detached from the top portion so as to totally block the operation of the converter device after an attempt at fraud has been made on the meter, even if the mechanical action involved in the fraud is no longer applied.

Abstract: A volumetric liquid meter of the oscillating piston type having a chamber, includes a bottom portion, a fixed partition, a piston and a filter. At least one element forming the chamber is formed by at least two materials presenting different mechanical characteristics and is made by a multi-material injection method.

Abstract: A reciprocating-piston type meter for measuring liquid volume comprises a meter body 2 having a measuring chamber disposed therein. In a space 11 existing between the meter body 2 and the measuring chamber 7, the meter has means 13 for creating a swirling stream of liquid and means 14 for confining particles present in the liquid.

Abstract: The invention relates to a method of measuring a force F exerted on a piece in a given direction in the presence of external pressure Pe and temperature T.

Abstract: In order to measure forces F exerted on a part in a given direction and in the presence of an external pressure p, the part has integrated therein a sensor (10) which delivers an output signal of the form S=&agr;.F+&bgr;.p+&ggr;, and said sensor is dimensioned in such a manner as to cause the coefficient &bgr; to be zero. To this end, a sensor (10) is used that includes a tube (12) formed by a thinner walled portion (12a) and a thicker walled portion (12b), together with strain gauges (16a, 16b, 18a, 20) mounted in the tube (12) and interconnected to form a Wheatstone bridge.

Abstract: A method of manufacturing a liquid meter including various components such as a meter body, a measuring chamber, its cover or a piston and a mounting ring for a totalizer, consists of manufacturing at least one of the components by an injection molding process using a mold whose shape is adapted to the component to be manufactured by injecting a plastics material around a metal insert intended to form a portion of the core of a portion of one of the components.

Abstract: A meter, in particular a fluid meter 1 comprises a meter body provided with means 2 for measuring a fluid flow rate, a counter 5 mounted on the meter body and provided in its top portion 8 with means 7 for displaying the quantity of fluid that has been consumed, and in its bottom portion with converter means 6 for converting the fluid flow rate into the quantity of fluid that has been consumed, and fraud indicator means 12, 14, 15, 16 associated with the top portion 8. A portion of the fraud indicator means 12, 14, 15, 16 is designed to be partially or totally detached from the top portion 8 so as to totally block the operation of the converter means 6 after an attempt at fraud has been made on the meter, even if the mechanical action involved in the fraud is no longer applied.