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).

  • Patent number: 8561869
    Abstract: 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: Grant
    Filed: August 24, 2006
    Date of Patent: October 22, 2013
    Assignee: Hilti Aktiengesellschaft
    Inventor: Kaveh Towfighi
  • Publication number: 20070045377
    Abstract: 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: Application
    Filed: August 24, 2006
    Publication date: March 1, 2007
    Inventor: Kaveh Towfighi
  • Patent number: 7128030
    Abstract: 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: Grant
    Filed: December 22, 2003
    Date of Patent: October 31, 2006
    Assignee: Hilti Aktiengesellschaft
    Inventors: Hans Gschwend, Kaveh Towfighi, Lothar Voelker, Ulrich Schiestl, Iwan Wolf, Ulrich Rosenbaum
  • Patent number: 6896794
    Abstract: 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: Grant
    Filed: September 10, 2002
    Date of Patent: May 24, 2005
    Assignee: Hilti Aktiengesellschaft
    Inventor: Kaveh Towfighi
  • Publication number: 20040256037
    Abstract: 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: Application
    Filed: April 22, 2004
    Publication date: December 23, 2004
    Inventor: Kaveh Towfighi
  • Publication number: 20040226976
    Abstract: 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: Application
    Filed: February 18, 2004
    Publication date: November 18, 2004
    Inventors: Kaveh Towfighi, Lothar Voelker
  • Publication number: 20040187810
    Abstract: 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: Application
    Filed: December 22, 2003
    Publication date: September 30, 2004
    Inventors: Hans Gschwend, Kaveh Towfighi, Lothar Voelker, Ulrich Schiestl, Iwan Wolf, Ulrich Rosenbaum
  • Patent number: 6607567
    Abstract: 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: Grant
    Filed: October 4, 2000
    Date of Patent: August 19, 2003
    Assignee: Hilti Aktiengesellschaft
    Inventor: Kaveh Towfighi
  • Patent number: 6607011
    Abstract: 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: Grant
    Filed: September 14, 2001
    Date of Patent: August 19, 2003
    Assignee: Hilti Aktiengesellschaft
    Inventor: Kaveh Towfighi
  • Publication number: 20030066847
    Abstract: 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: Application
    Filed: April 3, 2002
    Publication date: April 10, 2003
    Inventor: Kaveh Towfighi
  • Publication number: 20030051394
    Abstract: 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: Application
    Filed: September 10, 2002
    Publication date: March 20, 2003
    Inventor: Kaveh Towfighi
  • Patent number: 6526926
    Abstract: 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: Grant
    Filed: October 6, 2000
    Date of Patent: March 4, 2003
    Assignee: Hilti Aktiengesellschaft
    Inventor: Kaveh Towfighi
  • Patent number: 6520127
    Abstract: 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: Grant
    Filed: October 6, 2000
    Date of Patent: February 18, 2003
    Assignee: Hilti Aktiengesellschaft
    Inventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
  • Patent number: 6505767
    Abstract: 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: Grant
    Filed: December 19, 2000
    Date of Patent: January 14, 2003
    Assignee: Hiltie Aktiengeselschaft
    Inventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
  • Patent number: 6491015
    Abstract: 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: Grant
    Filed: October 6, 2000
    Date of Patent: December 10, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
  • Patent number: 6463894
    Abstract: 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: Grant
    Filed: December 19, 2000
    Date of Patent: October 15, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Roland Hasler, Kaveh Towfighi
  • Patent number: 6460507
    Abstract: 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: Grant
    Filed: December 19, 2000
    Date of Patent: October 8, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
  • Patent number: 6443118
    Abstract: 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: Grant
    Filed: December 19, 2000
    Date of Patent: September 3, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
  • Patent number: 6419168
    Abstract: 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: Grant
    Filed: October 6, 2000
    Date of Patent: July 16, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Joachim Thieleke, Kaveh Towfighi, Iwan Wolf
  • Patent number: 6378288
    Abstract: 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: Grant
    Filed: February 13, 2001
    Date of Patent: April 30, 2002
    Assignee: Hilti Aktiengesellschaft
    Inventors: Kaveh Towfighi, Harald Fielitz, Wolfgang Saxler