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An apparatus for damping acoustic vibrations in a combustor as well as a corresponding combustor arrangement with the apparatus. The apparatus includes a Helmholtz resonator (4) that can be connected via a connecting channel (2) with a combustor (1). The Helmholtz resonator (4) contains a hollow bod

An apparatus for damping acoustic vibrations in a combustor as well as a corresponding combustor arrangement with the apparatus. The apparatus includes a Helmholtz resonator (4) that can be connected via a connecting channel (2) with a combustor (1). The Helmholtz resonator (4) contains a hollow body (6) the volume of which can be changed by adding or draining a fluid via a supply line (5), or is located adjacent to such a hollow body in such a way that the resonance volume (3) of the Helmholtz resonator (4) is changed when the volume of the hollow body (6) is changed. This apparatus makes it possible to adjust the resonance frequency of a Helmholtz resonator arranged inside a pressure container in accordance with the respective current operating point of the combustor to be damped, without having to pass movable components through the pressure container.

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An apparatus for damping acoustic vibrations in a combustor as well as a corresponding combustor arrangement with the apparatus. The apparatus includes a Helmholtz resonator (4) that can be connected via a connecting channel (2) with a combustor (1). The Helmholtz resonator (4) contains a hollow bod

An apparatus for damping acoustic vibrations in a combustor as well as a corresponding combustor arrangement with the apparatus. The apparatus includes a Helmholtz resonator (4) that can be connected via a connecting channel (2) with a combustor (1). The Helmholtz resonator (4) contains a hollow body (6) the volume of which can be changed by adding or draining a fluid via a supply line (5), or is located adjacent to such a hollow body in such a way that the resonance volume (3) of the Helmholtz resonator (4) is changed when the volume of the hollow body (6) is changed. This apparatus makes it possible to adjust the resonance frequency of a Helmholtz resonator arranged inside a pressure container in accordance with the respective current operating point of the combustor to be damped, without having to pass movable components through the pressure container. ea than the width of said fastener-driving tool. 2. The fastener-driving tool combination of claim 1, wherein said contact surface is at least about double the width of said fastener-driving tool. 3. The fastener-driving tool combination of claim 1, wherein said accessory body comprises a pair of laterally extending side regions, each of said side regions extending laterally from said nail gun side surface a sufficient distance to provide a surface at the top of said accessory so the user can place a foot on a laterally extending side region in order to stabilize said fastener-driving tool while fastening said flooring material in place, whereby the tendency of the fastener-driving tool to rock is reduced. 4. The device of claim 1 where said accessory is plastic. 5. The device of claim 1 where the device is rubber. 6. The device of claim 1 where the device is Teflon. 7. The device of claim 1 where the device is wood. 8. A method for eliminating damage to a flooring material during the impact fastening of flooring materials, comprising the steps of: placing a first tongue and groove floorboard adjacent to a previously placed second floorboard; positioning an impact device in contact with the front surface of a tongue on a tongue and groove flooring material and stabilized on the top surface of the flooring material; said impact device having an impact mechanism section and a stabilizer section, said stabilizer section having an extended bottom surface, said extended bottom surface lying in a first plane and a second plane, said first plane being parallel to said second plane, and a front plate extending between said first plane and said second plane at a right angle to each of said first plane and said second plane, said front plate providing a contact surface between said impact device and said front surface of a tongue, said impact section extended bottom surface stabilizing said impact device against movement relative to said top surface of said flooring material and eliminating inadvertent movement of said fastener-driving tool relative to flooring during the application of impact force, and seating the groove in an adjacent tongue by applying impact force to said first floorboard and fastening said first floorboard to said second floorboard and wherein said front place disperses said impact force over a substantially wider area than the width of said impact mechanism section, further comprising the step of placing a foot on a laterally extending side region of said stabilizer section and thereby stabilizing impact device while fastening said flooring material in place, whereby the tendency of said impact device to rock is reduced. er; US-4368736, 19830100, Kaster; US-4466436, 19840800, Lee; US-4505414, 19850300, Filipi; US-4523592, 19850600, Daniel; US-4553542, 19851100, Schenck et al.; US-4573468, 19860300, Conta et al.; US-4576167, 19860300, Noiles; US-4586503, 19860500, Kirsch et al.; US-4592354, 19860600, Rothfuss; US-4593693, 19860600, Schenck; US-4603693, 19860800, Conta et al.; US-4607637, 19860800, Berggren et al.; US-4624255, 19861100, Schenck et al.; US-4624257, 19861100, Berggren et al.; US-4646745, 19870300, Noiles; US-4657019, 19870400, Walsh et al.; US-4665906, 19870500, Jervis; US-4700703, 19871000, Resnick et al.; US-4703887, 19871100, Clanton et al.; US-4747407, 19880500, Liu et al.; US-4763851, 19880800, Flament; US-4907591, 19900300, Vasconcellos et al.; US-4917087, 19900400, Walsh et al.; US-4917090, 19900400, Berggren et al.; US-4917091, 19900400, Berggren et al.; US-4936942, 19900600, Sollinger et al.; US-4957499, 19900900, Lipstov et al.; US-5119983, 19920600, Green et al.; US-5197649, 19930300, Bessler et al.; US-5234447, 19930800, Kaster et al.; US-5242457, 19930900, Akopov; US-5271543, 19931200, Grant et al.; US-5292053, 19940300, Bilotti et al.; US-5324447, 19940600, Lam et al.; US-5330503, 19940700, Yoon; US-5333773, 19940800, Main et al.; US-5336233, 19940800, Chen; US-5348259, 19940900, Blanco et al.; US-5366462, 19941100, Kastger et al.; US-5395030, 19950300, Kuramoto et al.; US-5403333, 19950400, Kaster et al.; US-5478354, 19951200, Tovey et al.; US-5522834, 19960600, Fonger et al.; US-5549619, 19960800, Peters et al.; US-5554162, 19960900, DeLange; US-5588579, 19961200, Schnut et al.; US-5620452, 19970400, Yoon; US-5669918, 19970900, Balazs et al.; US-5732872, 19980300, Bolduc et al., 227/019; US-5855312, 19990100, Toledano; US-5868760, 19990200, McGuckin, Jr.; US-5881943, 19990300, Heck et al.; US-5947363, 19990900, Bolduc et al.