Patents by Inventor Kaveh Towfighi
Kaveh Towfighi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8561869Abstract: A pneumatically driven setting tool for driving in fastening elements, includes a chamber (17) forming a storage chamber (22) for storing the pressure medium produced by the compression device (30, 130) and an expansion chamber (26) adjoining the drive-in piston (13), which is displaceable in a guide (12), at a side of the drive-in piston (13) remote from the piston stem (14), communicating with the storage chamber (22), and having an opening (18) connecting the expansion chamber (26) with the drive-in piston (13), at least one check valve (44, 54, 142) arranged between the compression device (30, 130) and the chamber (17), and a piston retaining device (47) for retaining the drive-in piston (13) in its initial position (80) in which the chamber (17) is sealed against the guide (12).Type: GrantFiled: August 24, 2006Date of Patent: October 22, 2013Assignee: Hilti AktiengesellschaftInventor: Kaveh Towfighi
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Publication number: 20070045377Abstract: A pneumatically driven setting tool for driving in fastening elements, includes a chamber (17) forming a storage chamber (22) for storing the pressure medium produced by the compression device (30, 130) and an expansion chamber (26) adjoining the drive-in piston (13), which is displaceable in a guide (12), at a side of the drive-in piston (13) remote from the piston stem (14), communicating with the storage chamber (22), and having an opening (18) connecting the expansion chamber (26) with the drive-in piston (13), at least one check valve (44, 54, 142) arranged between the compression device (30, 130) and the chamber (17), and a piston retaining device (47) for retaining the drive-in piston (13) in its initial position (80) in which the chamber (17) is sealed against the guide (12).Type: ApplicationFiled: August 24, 2006Publication date: March 1, 2007Inventor: Kaveh Towfighi
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Patent number: 7128030Abstract: A combustion-engined setting tool for driving fasting elements such as nails, bolts, pins in an object, includes a combustion chamber (13), a fuel source (11), a fuel conduit (12) connecting the fuel source (11) with combustion chamber (13) for feeding fuel thereinto, and at least one metering device (30) for metering a predetermined amount of fuel for effecting a setting process and having at least one variable volume metering chamber (31), and a displaceable piston body (34) for a pulsed ejection of fuel from the metering chamber (31).Type: GrantFiled: December 22, 2003Date of Patent: October 31, 2006Assignee: Hilti AktiengesellschaftInventors: Hans Gschwend, Kaveh Towfighi, Lothar Voelker, Ulrich Schiestl, Iwan Wolf, Ulrich Rosenbaum
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Patent number: 6896794Abstract: A fuel for internal combustion-powered tools, especially for setting tools for fastening elements and based on a liquefied, combustible gas or gas mixture with a vapor pressure of 2 to 15 bar absolute at 20° C., and at least one combustible compound, which is soluble in the gas or gas mixture and is a liquid at 20° C. and atmospheric pressure, and which is used as an agent for improving the combustion behavior.Type: GrantFiled: September 10, 2002Date of Patent: May 24, 2005Assignee: Hilti AktiengesellschaftInventor: Kaveh Towfighi
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Publication number: 20040256037Abstract: A propellant is described for internal combustion-operated tools, especially for setting equipment for fastening elements, based on combustible gases containing isoparaffin and/or synthetic oil based on esters or poly-&agr;-olefins with a boiling point ranging from 120° to 250° C. as lubricant, which can be burned without leaving a residue. Furthermore, a method is described for producing this propellant as well as for using at least one isoparaffin and/or combustible synthetic or, based on esters or poly-&agr;-olefins with a boiling point ranging from 120° to 250° C. as a lubricant, which burns without leaving a residue, in propellant gases based on combustible gases for internal combustion-operated tools.Type: ApplicationFiled: April 22, 2004Publication date: December 23, 2004Inventor: Kaveh Towfighi
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Publication number: 20040226976Abstract: A combustion energy-operated setting tool for driving in fastening elements includes a setting piston (13) displaceable in a guide chamber (11) by reaction gases of a fuel, a bolt guide (20) for receiving and guiding the fastening elements and adjoining the guide chamber (11) in a setting direction, with the bolt guide (20) having a first region (21) with an inner diameter (D1) and a second region (21), extending in a direction toward an end (24) of the bolt guide (20) remote from the guide chamber (11), and having an inner diameter (D2) smaller than the inner diameter (D1) of the first region (21).Type: ApplicationFiled: February 18, 2004Publication date: November 18, 2004Inventors: Kaveh Towfighi, Lothar Voelker
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Publication number: 20040187810Abstract: A combustion-engined setting tool for driving fasting elements such as nails, bolts, pins in an object, includes a combustion chamber (13), a fuel source (11), a fuel conduit (12) connecting the fuel source (11) with combustion chamber (13) for feeding fuel thereinto, and at least one metering device (30) for metering a predetermined amount of fuel for effecting a setting process and having at least one variable volume metering chamber (31), and a displaceable piston body (34) for a pulsed ejection of fuel from the metering chamber (31).Type: ApplicationFiled: December 22, 2003Publication date: September 30, 2004Inventors: Hans Gschwend, Kaveh Towfighi, Lothar Voelker, Ulrich Schiestl, Iwan Wolf, Ulrich Rosenbaum
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Patent number: 6607011Abstract: A pressurized container (1) with crimped surfaces (2, 2′, 2″) at contact regions (3, 3′) on the two surfaces (2, 2″, 2′, 2″) are sealed gas-tight by crimping and with a gas-tight sealing compound (4) as an intermediate layer between the two surfaces (2-2′, 2′-2″). The gas-tight sealing compound (4) is applied between the surfaces (2-2′, 2′-2″) of the pressurized can (1) before the crimping.Type: GrantFiled: September 14, 2001Date of Patent: August 19, 2003Assignee: Hilti AktiengesellschaftInventor: Kaveh Towfighi
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Patent number: 6607567Abstract: A propellant gas is described for tools, operated by combustion power, especially for setting equipment for fastening elements, on the basis of combustible gases containing a mixture of (A) 40% to 70% by weight of dimethyl ether, nitrous oxide and/or nitromethane, (B) 8% to 20% by weight of propylene, methyl acetylene, propane and/or propadiene and (C) 20% to 45% by weight of isobutane and/or n-butane.Type: GrantFiled: October 4, 2000Date of Patent: August 19, 2003Assignee: Hilti AktiengesellschaftInventor: Kaveh Towfighi
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Publication number: 20030066847Abstract: A pressure intensified including a base body (1), a cover (2) for closing the base body (1), a bottle (4) located in an interior of the base body (1) and filled with a liquid internal gas (5), a valve (3) extending through the cover (2) and connected with the bottle (4), and an external gas (6) filling an intermediate space between the bottle (4) and the base body (1) and having a gaseous component and a liquid component that substantially corresponds to the inner gas (5).Type: ApplicationFiled: April 3, 2002Publication date: April 10, 2003Inventor: Kaveh Towfighi
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Publication number: 20030051394Abstract: A fuel for internal combustion-powered tools, especially for setting tools for fastening elements and based on a liquefied, combustible gas or gas mixture with a vapor pressure of 2 to 15 bar absolute at 20° C., and at least one combustible compound, which is soluble in the gas or gas mixture and is a liquid at 20° C. and atmospheric pressure, and which is used as an agent for improving the combustion behavior.Type: ApplicationFiled: September 10, 2002Publication date: March 20, 2003Inventor: Kaveh Towfighi
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Patent number: 6526926Abstract: A method of driving a piston (8) of an internal combustion-engined tool having a combustion chamber which is separated by a separation plate (18) with a plurality of through-opening (38) into a fore-chamber section (21) and a main chamber section (22) adjoining the piston (8), including producing gas jets having a predetermined energy, which enter the main chamber section (22) through the through-openings (38) of the separation plate (18), combusting, in the fore-chamber section (21), at least approximately a volume of a combustible gas mixture corresponding to the pre-determined energy of the gas jets, and combusting, in the main chamber section, a combustible gas mixture for creating a pressure necessary for displacing the piston.Type: GrantFiled: October 6, 2000Date of Patent: March 4, 2003Assignee: Hilti AktiengesellschaftInventor: Kaveh Towfighi
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Patent number: 6520127Abstract: A method of driving a piston (80 of a portable, internal combustion, engine tool by combusting a combustible gas mixture in a combustion chamber (1) having a combustion chamber wall (14) located opposite the piston (8), the method including dividing the combustion chamber (1) in at least two chamber sections (21, 22) by providing, between the combustion chamber wall (14) and the piston (8), a separation plate (18) having a plurality of through-openings (38) and separately adjusting the combustible gas mixture in each chamber section (21, 22).Type: GrantFiled: October 6, 2000Date of Patent: February 18, 2003Assignee: Hilti AktiengesellschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6505767Abstract: A portable, internal combustion-engined tool includes a combustion chamber (1), a piston (8) adjoining the combustion chamber (1), with a pressure build-up in the combustion chamber (1) providing for movement of the piston (8) from its initial position, in which the piston adjoins the combustion chamber (1), away from the combustion chamber (1). A brake device (43) retains the piston (8) substantially in its initial position during build-up of pressure in the combustion chamber (1), with a braking force applied to piston (8) being changeable for adjusting the amount of energy generated in the combustion chamber and transmittable to the piston (8).Type: GrantFiled: December 19, 2000Date of Patent: January 14, 2003Assignee: Hiltie AktiengeselschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6491015Abstract: A device for creating a laminar flame front in an internal combustion-engined tool having a combustion chamber (1) with two walls (14, 18) extending parallel to each other, the device including a cage (51) located between the two walls (14, 18) and having a plurality of openings (53) formed in an otherwise solid circumferential wall of the cage (51), and an ignition element (52) located in a cage interior for igniting a combustible gas mixture located between the two walls (14, 18).Type: GrantFiled: October 6, 2000Date of Patent: December 10, 2002Assignee: Hilti AktiengesellschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6463894Abstract: An internal combustion-engined tool including a piston and a combustion chamber (1) for generating power for driving the piston and having a bottom (3) adapted to receive the piston plate (9), an end wall (17) located opposite the bottom (3), a movable wall (14) located between the bottom (3) and the end wall (17) and provided with an opening element (14a), a movable separation wall (18) located between the bottom (3) and the movable wall (14) and provided with a plurality of openings (38), and an arrangement (42, 43) for injecting fuel gas into a space formed between the end wall and the movable wall upon the movable wall (14) and the separation wall (18) being displaceable in a direction of the bottom (3) upon collapsing of the combustion chamber (1).Type: GrantFiled: December 19, 2000Date of Patent: October 15, 2002Assignee: Hilti AktiengesellschaftInventors: Roland Hasler, Kaveh Towfighi
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Patent number: 6460507Abstract: A portable, combustion-engined tool including a collapsible combustion chamber (1) having a movable separation plate (18) for dividing the combustion chamber (1), in an expanded position of the combustion chamber, in a forechamber section (21) and at least one further chamber section (22), a movable combustion chamber wall (14) arranged parallel to the separation plate (18) for limiting, together with the separation plate (18), the forechamber section, an ignition device (52) located in the forechamber section (21), and a collapse control device (19, 20, 33) for controlling movement of the separation plate (18) and the movable wall (14) after the combustion of the gas mixture in the combustion chamber.Type: GrantFiled: December 19, 2000Date of Patent: October 8, 2002Assignee: Hilti AktiengesellschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6443118Abstract: A portable, combustion-engined tool including a combustion chamber (1) in which a fuel gas in combusted upon ignition for building up pressure in the combustion chamber for driving the tool piston (8), an ignition device (20) for igniting the fuel gas in the combustion chamber (1), and gas drain means (43) provided in the combustion chamber (1) for controlling a pressure build-up therein.Type: GrantFiled: December 19, 2000Date of Patent: September 3, 2002Assignee: Hilti AktiengesellschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6419168Abstract: A metering head for delivering a liquified fuel gas in different combustion chamber sections of a tool and including an inlet (8), at least two outlets (16, 17), and at least one metering valve (5, 5a, 5b) connecting the inlet (8) with the at least two outlets (16, 17).Type: GrantFiled: October 6, 2000Date of Patent: July 16, 2002Assignee: Hilti AktiengesellschaftInventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
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Patent number: 6378288Abstract: A combustion-engined tool including two opposite combustion chamber walls (14,18), and an ignition device (52) arranged between the two opposite combustion chamber walls for igniting a fuel gas mixture occupying space between the two walls, and an element located between the ignition device (52) and openings (38) formed in one of the two walls (18) for localized swirling a laminary expanding flame front formed upon ignition of the fuel gas mixture with the ignition device (52).Type: GrantFiled: February 13, 2001Date of Patent: April 30, 2002Assignee: Hilti AktiengesellschaftInventors: Kaveh Towfighi, Harald Fielitz, Wolfgang Saxler