Patents Assigned to Lasag AG
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Publication number: 20180126488Abstract: The laser machining equipment for etching grooves in a wall of a mechanical part, in particular of a connecting rod for a spark ignition engine, is provided with a fibre optic laser device and arranged to supply laser pulses. The fibre optic laser device is controlled so that said laser pulses have a peak power of more than 400 W and at least two times greater than the maximum mean power of said laser device and in that the duration of said laser pulses is below or within the nanosecond range (1 ns to 1000 ns). According to a first embodiment, the fibre optic laser device is controlled in a quasi continuous wave (QCW) mode. According to a second preferred embodiment, the fibre optic laser device is controlled in a Q-switch mode. The selected operating modes increase machining efficiency and produce a groove with an optimum transverse profile, particularly with a small mean radius of curvature at the bottom of the groove which then allows precise subsequent fracturing of the mechanical part with less force.Type: ApplicationFiled: November 13, 2017Publication date: May 10, 2018Applicant: ROFIN-LASAG AGInventors: Ulrich DUERR, Rudolf Von Niederhaeusern, Bruno Frei
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Patent number: 8606093Abstract: The water heater (2) or steam generator comprises a chamber (4) in two sections (5, 6) formed in particular by stamping. Inside this chamber a heating element (8) is arranged, which has a spiral-shaped main section (10) and two end sections (11, 12) passing through two circular openings of the chamber. The two end sections are welded to the chamber by a laser beam such that the weld obtained is continuous and ensures a good mechanical fixture of the heating element and an adequate tightness for the water heater or steam generator. For this purpose, a flange (18) is arranged at the periphery of each opening. Moreover, the two sections of the chamber have a widened edge (28) to allow them to be welded effectively.Type: GrantFiled: March 14, 2012Date of Patent: December 10, 2013Assignee: LASAG AGInventors: Mario Montanaro, David Naman, Gustavo Beltrami
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Publication number: 20130153554Abstract: A laser machining equipment for etching grooves in a wall of a mechanical part, or in a connecting rod for a spark ignition engine, includes a fiber optic laser device arranged to supply laser pulses. The fiber optic laser device is controlled so that laser pulses have a peak power of more than 400 W and at least two times greater than maximum mean power of the laser device, and duration of the laser pulses is below or within the nanosecond range of 1 ns to 1000 ns. The fiber optic laser device can be controlled in a quasi continuous wave (QCW) mode, or can be controlled in a Q-switch mode. The selected operating modes increase machining efficiency and produce a groove with an optimum transverse profile, particularly with a small mean radius of curvature at a bottom of the groove which then allows precise subsequent fracturing of the mechanical part with less force.Type: ApplicationFiled: May 20, 2011Publication date: June 20, 2013Applicant: Rofin-Lasag AGInventors: Ulrich Duerr, Rudolf Von Niederhaeusern, Bruno Frei
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Publication number: 20130134139Abstract: A laser machining method includes A) generating, by a laser source, a laser beam having an initial wavelength between 700 and 1200 nanometers of laser pulses; B) doubling frequency of one part of the laser beam by a non-linear crystal; C) varying power throughout each emitted laser pulse so that the power profile has a maximum peak power or part of the pulse with a maximum power in an initial sub-period, and throughout an intermediate sub-period of longer duration than the initial sub-period, a lower power than the maximum power. The maximum power value is at least two times higher than the mean power throughout the laser pulse and an increase time to maximum power from a start of each laser pulse is less than 0.3 milliseconds. The machining method can concern welding highly reflective metals, copper, gold, silver, or an alloy including one of these metals.Type: ApplicationFiled: May 9, 2011Publication date: May 30, 2013Applicant: ROFIN-LASAG AGInventors: Ulrich Duerr, Christoph Ruettimann, Bruno Frei
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Patent number: 8304687Abstract: The invention relates to a laser spot welding process for executing a spot weld in two successive steps, namely a first step of preparing the surface state of the material to be welded and a second step of welding as such. The luminous energy (BR) reflected by the weld region of the material is measured in real time during the first step and then processed by a controller circuit (37) connected to a control circuit (30) of the laser source (31). In this way, the characteristics (LM) of the laser beam are adjusted in real time as a function of the measurements effected to allow effective control of the quality of the weld obtained, and in particular of its dimensions. The invention also relates to a welding device for implementing this process.Type: GrantFiled: May 7, 2004Date of Patent: November 6, 2012Assignee: Lasag AGInventors: Simone Amorosi, Ronald Gianotti, Hans Peter Schwob, Thomas Sidler, Christian Wissing
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Publication number: 20120180316Abstract: The water heater (2) or steam generator comprises a chamber (4) in two sections (5, 6) formed in particular by stamping. Inside this chamber a heating element (8) is arranged, which has a spiral-shaped main section (10) and two end sections (11, 12) passing through two circular openings of the chamber. The two end sections are welded to the chamber by a laser beam such that the weld obtained is continuous and ensures a good mechanical fixture of the heating element and an adequate tightness for the water heater or steam generator. For this purpose, a flange (18) is arranged at the periphery of each opening. Moreover, the two sections of the chamber have a widened edge (28) to allow them to be welded effectively.Type: ApplicationFiled: March 14, 2012Publication date: July 19, 2012Applicant: LASAG AGInventors: Mario Montanaro, David Naman, Gustavo Beltrami
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Patent number: 7804041Abstract: The laser machining device is provided for drilling holes in components of a fluid injection device, particularly for injecting fuel into a combustion engine. The laser resonator is formed by an optically pumped diode laser solid state active medium. The resonator is arranged for supplying primary pulses in the microsecond range. Modulation means are arranged between the resonator and a machining head for modulating the amplitude of the primary pulses supplied by the resonator, so as to obtain a secondary pulse train of smaller length for each of said pulses.Type: GrantFiled: March 9, 2004Date of Patent: September 28, 2010Assignee: Lasag AGInventors: Ulrich Dürr, Bruno Frei
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Publication number: 20100102045Abstract: The invention relates to a method for cutting parts (4) to be machined, using a pulsed laser (6) that outputs a beam (12) of laser pulses. The method is characterised in that a given cut is carried out using a single laser pulse, essentially for forming an opening (14) in the machined part. To this end, the method comprises a quick relative movement between the part and the laser beam (12) with a pulse duration that is sufficiently long, depending on the relative movement, so that the laser beam can run at least on the predetermined length for a given cut. Each laser pulse preferably has an initial power peak for piercing the machined part when the cutting operation is carried out in an inner region of the part.Type: ApplicationFiled: February 6, 2008Publication date: April 29, 2010Applicant: LASAG AGInventor: Ulrich Dürr
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Patent number: 7564006Abstract: An apparatus (1) for generating a rotating laser beam (5) which may used for various applications including welding, cutting, drilling or ablation of materials. More particularly, the apparatus is able to produce a fast rotating and accurate laser beam, because the main optical device (100) that is rotated consists of a reflecting surface (102) rotating about an axis (X1) that it intersects.Type: GrantFiled: May 13, 2004Date of Patent: July 21, 2009Assignee: LASAG AGInventors: Hans Peter Schwob, Joachim Hertzberg, Walter Zürcher, Friedrich Durand, Bruno Knobel
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Patent number: 7557325Abstract: The present invention concerns a method for manufacturing a needle, of the type used in the medical field. This needle is formed by a pulsed laser weld for joining a first portion having a pointed end and a second end having the shape of a tube and for receiving, in a subsequent step, the end of a suture thread. During the welding step, the needle and the incident laser beam are driven in a relative rotational movement whose speed is adjusted such that during the duration of a laser beam pulse, at least one complete revolution is carried out.Type: GrantFiled: August 5, 2004Date of Patent: July 7, 2009Assignee: LASAG AGInventor: Adrian Fiechter
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Patent number: 7399946Abstract: The present invention relates to an apparatus (1) for generating a rotating laser beam (5) which may used for various applications including welding, cutting, drilling or ablation of materials. More particularly, the apparatus (1) according to the present invention is able to produce a fast rotating and accurate laser beam, because the main optical device (100) that is rotated consists of a first reflecting surface (102) rotating about an axis (X1), a second reflecting surface (26) having an annular shape, wherein the first reflecting surface (102) redirects said laser beam in to the direction of the second reflecting surface (26), which reflects said laser beam towards said axis (X1).Type: GrantFiled: May 13, 2004Date of Patent: July 15, 2008Assignee: LASAG AGInventors: Joachim Hertzberg, Hans Peter Schwob, Friedrich Durand, Walter Zürcher, Knobel Bruno
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Publication number: 20080087234Abstract: The water heater (2) or steam generator comprises a chamber (4) in two sections (5, 6) formed in particular by stamping. Inside this chamber a heating element (8) is arranged, which has a spiral-shaped main section (10) and two end sections (11, 12) passing through two circular openings of the chamber. The two end sections are welded to the chamber by a laser beam such that the weld obtained is continuous and ensures a good mechanical fixture of the heating element and an adequate tightness for the water heater or steam generator. For this purpose, a flange (18) is arranged at the periphery of each opening. Moreover, the two sections of the chamber have a widened edge (28) to allow them to be welded effectively.Type: ApplicationFiled: July 4, 2005Publication date: April 17, 2008Applicant: LASAG AGInventors: Mario Montanaro, David Naman, Gustavo Beltrami
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Publication number: 20040226923Abstract: The invention relates to a laser spot welding process for executing a spot weld in two successive steps, namely a first step of preparing the surface state of the material to be welded and a second step of welding as such. The luminous energy (BR) reflected by the weld region of the material is measured in real time during the first step and then processed by a controller circuit (37) connected to a control circuit (30) of the laser source (31). In this way, the characteristics (LM) of the laser beam are adjusted in real time as a function of the measurements effected to allow effective control of the quality of the weld obtained, and in particular of its dimensions.Type: ApplicationFiled: May 7, 2004Publication date: November 18, 2004Applicant: LASAG AGInventors: Simone Amorosi, Ronald Gianotti, Hans Peter Schwob, Thomas Sidler, Christian Wissing
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Patent number: 6283776Abstract: The device is provided with at least one laser diode (2) and two electric connecting members for connection to an electric power supply (8) for supplying said at least one laser diode. It includes two elements (14, 16) which can be elastically deformed or moved, which are conductive electrically and arranged in a base electrically insulated from the two connecting members. The two elastically deformable or moveable elements are electrically connected and arranged so as to abut against two respective contact surfaces (34, 36) of the two connecting members when the device is not connected to said power supply by means of an external connector (40) which is complementary to the two electric connecting members. The two elastically deformable or moveable elements are respectively separated from the two connecting members when the external connector is introduced or are able to be respectively separated from said two connecting members when the external connector is introduced.Type: GrantFiled: January 11, 2000Date of Patent: September 4, 2001Assignee: Lasag AGInventors: André Gressly, Bruno Frei
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Patent number: 5893989Abstract: The laser device (2) includes a frontal housing (4) arranged to receive a laser beam (8) at its input opening (6). Within the frontal housing (4) are provided optical guiding devices for the incoming laser beam (8) which define optical paths (10, 12) leading from the input opening (6) to two machining heads (14, 16) arranged so that the two optical paths are extended respectively within the two machining heads up to the respective output openings of the latter. The two optical paths (10, 12) respectively leaving the two machining heads (14, 16) define two optical axes (22, 24) which cross each other and together define a machining plane. The laser machining device (2) is particularly suited to machining connecting rods for engines.Type: GrantFiled: April 15, 1997Date of Patent: April 13, 1999Assignee: Lasag AGInventor: Rudolf von Niederhausern
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Patent number: 5345057Abstract: The invention relates to a method of cutting an aperture in a device (1) by means of a laser beam (9), said device comprising a wall (2) having first (5) and second (6) opposing surfaces, and a third surface (7) separated from said wall (2) along the path (11) of said laser beam (9), said method comprising the steps of:(a) causing said laser beam (9) to be incident upon said first surface (10) so as to cut through said wall (2) and form said aperture, and(b) introducing fluid between said second (6) and third (7) surfaces in the path (11) of said laser beam (9) so as to thereby prevent damage to said third surface (7) when said laser beam has cut through said wall.The invention may be used to cut aperture in devices such as injector nozzles syringe needles, medical stents and fluid/air control valves.Type: GrantFiled: March 25, 1993Date of Patent: September 6, 1994Assignee: Lasag AGInventor: Fritz Muller
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Patent number: 5122135Abstract: An apparatus having a first generator designed to produce a first beam of coherent light, the energy of which is concentrated in a succession of impulses each capable causing a microexplosion in organic tissue at the point to be treated, a second generator designed to produce a second beam of coherent light able to penetrate the thickness of this organic tissue, an optical system designed to focus the first or the second beam on the point to be treated and a beam switch able to selectively direct the first or the second beam towards the optical system. The second beam enables ophthalmologists to perform operations that could not hiterto be performed with know apparatuses, notably operations involving the penetration of a treatment beam into the thickness of the tissues of the eye.Type: GrantFiled: October 5, 1989Date of Patent: June 16, 1992Assignee: Lasag AGInventors: Ulrich Durr, Taoufik Nouri, Jurg Steinger
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Patent number: 5021632Abstract: A tool designed to operate in a substantially vertical position without contact with a workpiece such as a laser beam machining head comprising an operating member and a support for this member rigidly connected to a machine frame. This operating member comprises mounting means resting at at least three points on a support, this tool also has abutment means impeding displacement of the operating member in a plane substantially perpendicular to its axis (W, W').Type: GrantFiled: September 4, 1990Date of Patent: June 4, 1991Assignee: Lasag AGInventor: Ulrich Hauert
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Patent number: 5013311Abstract: The arrangement of this invention concerns a surgical apparatus, in particular for ophthalmological use. In addition to a power beam it includes a beam of coherent visible light (29) which is transformed into at least one elementary beam (30) by means of a homogeneous light guide (21). The guide, which may be an optical fiber, is fixed to a rotating element (33) rotating about an axis (2). When the element rotates the elementary beam generates a luminous tubular beam intended to surround the power beam, the whole then being focussed by a lens to a point terminating a treatment cone with a predetermined vertex angle. The rotating element may include means for varying the diameter of the luminous tubular beam such as a transporter (39) bearing one end of the optical fiber and responding to the operation of a screw (45). The arrangement permits, on one hand to localize a point of treatment in the eye and, if necessary, modification of the vertex angle of the treatment cone.Type: GrantFiled: October 5, 1989Date of Patent: May 7, 1991Assignee: Lasag AGInventor: Taoufik Nouri
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Patent number: 5000563Abstract: The apparatus of this invention is intended for observation and treatment of a patient, in particular for ophthalmological cases. Such apparatus includes an arrangement (10) for ophthalmological observation and treatment, means (12) for effecting positioning and adjustment of said arrangement (10), an underframe (14) for supporting the means (12) and said arrangement (10) as well as a head rest system (16). In this apparatus the means (12) comprises jointed means permitting rotation of the arrangement (10) around a horizontal axis. The apparatus is applied for observing and treating the eyes of a patient who may be seated or recumbent.Type: GrantFiled: October 5, 1989Date of Patent: March 19, 1991Assignee: Lasag AGInventors: Heinz Gisel, Paul Batscher