Patents by Inventor Randall Maxwell
Randall Maxwell 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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Publication number: 20190284664Abstract: A method for manufacturing a shape-set nonlinear non-superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file path being defined by one or more displacement members, the file path configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file path, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 350° C. to about 600° C.Type: ApplicationFiled: June 3, 2019Publication date: September 19, 2019Applicant: DENTSPLY SIRONA Inc.Inventors: Dan AMMON, Vince K SHOTTON, Yong GAO, Randall MAXWELL
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Patent number: 10351934Abstract: A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300° C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.Type: GrantFiled: November 14, 2014Date of Patent: July 16, 2019Assignee: DENTSPLY SIRONA Inc.Inventors: Dan Ammon, Vincent Shotton, Yong Gao, Randall Maxwell
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Patent number: 10130451Abstract: A tip assembly for use with a dental tool, the tip assembly comprising a housing for attaching to the dental tool, at least one aspiration needle having a passageway extending at least partially through the aspiration needle, a substantial length of the aspiration needle, or at least from one end to the other end of the aspiration needle, the passageway providing a single continuous path to aspirate the irrigant and/or debris from the root canal cavity of the tooth, and at least one irrigation needle having a passageway extending at least partially through the irrigation needle, a substantial length of the irrigation needle, or at least from one end to the other end of the irrigation needle, the passageway provides a continuous flow path for delivering fluid/irrigant from a reservoir in communication with a proximal end of the irrigation needle to the distal end of the irrigation needle and into a root canal/coronal opening of a tooth.Type: GrantFiled: October 17, 2017Date of Patent: November 20, 2018Assignee: DENTSPLY SIRONA Inc.Inventors: Randall Maxwell, Kevin Wilkinson
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Publication number: 20180036105Abstract: A tip assembly for use with a dental tool, the tip assembly comprising a housing for attaching to the dental tool, at least one aspiration needle having a passageway extending at least partially through the aspiration needle, a substantial length of the aspiration needle, or at least from one end to the other end of the aspiration needle, the passageway providing a single continuous path to aspirate the irrigant and/or debris from the root canal cavity of the tooth, and at least one irrigation needle having a passageway extending at least partially through the irrigation needle, a substantial length of the irrigation needle, or at least from one end to the other end of the irrigation needle, the passageway provides a continuous flow path for delivering fluid/irrigant from a reservoir in communication with a proximal end of the irrigation needle to the distal end of the irrigation needle and into a root canal/coronal opening of a tooth.Type: ApplicationFiled: October 17, 2017Publication date: February 8, 2018Applicant: DENTSPLY SIRONA Inc.Inventors: Randall MAXWELL, Kevin WILKINSON
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Patent number: 9820834Abstract: A tip assembly for use with a dental tool, the tip assembly comprising a housing for attaching to the dental tool, at least one aspiration needle having a passageway extending at least partially through the aspiration needle, a substantial length of the aspiration needle, or at least from one end to the other end of the aspiration needle, the passageway providing a single continuous path to aspirate the irrigant and/or debris from the root canal cavity of the tooth, and at least one irrigation needle having a passageway extending at least partially through the irrigation needle, a substantial length of the irrigation needle, or at least from one end to the other end of the irrigation needle, the passageway provides a continuous flow path for delivering fluid/irrigant from a reservoir in communication with a proximal end of the irrigation needle to the distal end of the irrigation needle and into a root canal/coronal opening of a tooth.Type: GrantFiled: January 24, 2014Date of Patent: November 21, 2017Assignee: DENTSPLY INTERNATIONAL INC.Inventors: Randall Maxwell, Kevin Wilkinson
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Publication number: 20170135785Abstract: A hollow endodontic instrument having: a file axis; a proximal end; a tip; and a shaft portion between the proximal end and the tip; wherein the shaft portion defines a hollow void at least partially bounded by a plurality of fingers and a plurality of longitudinal spacings, each finger extends from the proximal end and includes an outer surface and an inner surface extending between longitudinal opposing walls; and wherein a portion of at least one of the longitudinal opposing walls includes a cutting edge.Type: ApplicationFiled: December 5, 2016Publication date: May 18, 2017Inventors: Randall MAXWELL, Vincent SHOTTON, KEVIN WILKINSON, Yong GAO
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Patent number: 9539063Abstract: A method for manufacturing a hollow instrument comprising the steps of: providing a hollow tube having a longitudinal tube axis; forming at least one opening along a shaft portion of the hollow tube following a predetermined pattern thereby defining a plurality of fingers; and deforming at least a portion of the hollow tube into a desired shape; and optionally joining at least two fingers along a portion of the opening to secure the hollow tube in the desired shape thereby forming the hollow instrument.Type: GrantFiled: February 24, 2012Date of Patent: January 10, 2017Assignee: DENTSPLY International Inc.Inventors: Randall Maxwell, Vincent Shotton, Kevin Wilkinson, Yong Gao
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Publication number: 20150164617Abstract: A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300° C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.Type: ApplicationFiled: November 14, 2014Publication date: June 18, 2015Inventors: DAN AMMON, VINCENT SHOTTON, YONG GAO, RANDALL MAXWELL
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Patent number: 8916009Abstract: A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300° C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.Type: GrantFiled: November 18, 2011Date of Patent: December 23, 2014Assignee: DENTSPLY International Inc.Inventors: Dan Ammon, Vincent Shotton, Yong Gao, Randall Maxwell
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Publication number: 20140302454Abstract: A tip assembly for use with a dental tool, the tip assembly comprising a housing for attaching to the dental tool, at least one aspiration needle having a passageway extending at least partially through the aspiration needle, a substantial length of the aspiration needle, or at least from one end to the other end of the aspiration needle, the passageway providing a single continuous path to aspirate the irrigant and/or debris from the root canal cavity of the tooth, and at least one irrigation needle having a passageway extending at least partially through the irrigation needle, a substantial length of the irrigation needle, or at least from one end to the other end of the irrigation needle, the passageway provides a continuous flow path for delivering fluid/irrigant from a reservoir in communication with a proximal end of the irrigation needle to the distal end of the irrigation needle and into a root canal/coronal opening of a tooth.Type: ApplicationFiled: January 24, 2014Publication date: October 9, 2014Applicant: DENTSPLY International Inc.Inventors: Randall MAXWELL, Kevin WILKINSON
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Publication number: 20120282571Abstract: A method for manufacturing a nonlinear superelastic file comprising the steps of: providing a superelastic file having a shaft and a file axis; providing a fixture including a file groove being defined by one or more displacement members, the file groove configured for receiving the shaft; inserting at least a portion of the shaft into the fixture along the file groove, the portion of the shaft including a first portion of the shaft; contacting the first portion of the shaft with a first displacement member of the one or more displacement members such that the first portion of the shaft is displaced from the file axis thereby forming a first offset portion of the shaft; heating the portion of the shaft while inserted in the fixture to a temperature of at least about 300° C. for a time period of at least about 1 minute to shape-set the portion of the shaft thereby forming a shape-set nonlinear file.Type: ApplicationFiled: November 18, 2011Publication date: November 8, 2012Applicant: DENTSPLY INTERNATIONAL INC.Inventors: DAN AMMON, VINCENT SHOTTON, YONG GAO, RANDALL MAXWELL
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Publication number: 20120219927Abstract: A method for manufacturing a hollow instrument comprising the steps of: providing a hollow tube having a longitudinal tube axis; forming at least one opening along a shaft portion of the hollow tube following a predetermined pattern thereby defining a plurality of fingers; and deforming at least a portion of the hollow tube into a desired shape; and optionally joining at least two fingers along a portion of the opening to secure the hollow tube in the desired shape thereby forming the hollow instrument.Type: ApplicationFiled: February 24, 2012Publication date: August 30, 2012Inventors: Randall Maxwell, Vince Shotton, Kevin Wilkinson, Yong Gao
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Publication number: 20110271529Abstract: A method for manufacturing a non-superelastic rotary file comprising the steps of: providing a superelastic rotary file having an austenite finish temperature; and heating the superelastic rotary file to a temperature of at least about 300° C. for a time period of at least about 5 minutes to alter the austenite finish temperature thereby forming the non-superelastic rotary file; wherein the altered austenite finish temperature of the non-superelastic rotary file is greater than about 25° C.Type: ApplicationFiled: May 6, 2011Publication date: November 10, 2011Applicant: DENTSPLY International Inc.Inventors: Yong Gao, Randall Maxwell
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Publication number: 20110020765Abstract: A consumable tip assembly for use with a dental tool and a system for irrigation of a tooth root canal. The dental tool has an ultrasonic energy generator positioned therein. The tip assembly provides a single continuous flow path for delivering fluid from a reservoir at the proximal end of the needle to a root canal of a tooth at the distal end of the needle. Energy generated by an ultrasonic energy generator is translated into movement of a needle to provide optimum cleaning to the root canal. The system also includes a pressure source of irrigation fluid connected to the tip assembly. The irrigation fluid has ultrasonic energy imposed thereon as it passes through a hand piece of the dental tool.Type: ApplicationFiled: April 30, 2010Publication date: January 27, 2011Inventors: Randall Maxwell, Charles E. Garrott, W. Shane Mize
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Publication number: 20090148810Abstract: A wireless dental apex locator (10) for use in determining the location of the apex of a patient's root, includes an electronic module (13) having a battery power source (13a), an impedance analyzer circuit (13b) and a radio frequency transmitter (13c); a grounding module (12) having a clip (15) for grounding the patient; a probe module (14) having an endodontic probe (21); and an associated but not physically connected display unit (11) having a receiver (31) for receiving radio frequency signals from the transmitter (13c). The display unit (11) has an electronic circuit that conditions the signals and interprets the signal for display on a graphic display (31).Type: ApplicationFiled: August 21, 2008Publication date: June 11, 2009Inventors: Randall Maxwell, Charles E. Garrott
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Publication number: 20060154199Abstract: A wireless dental apex locator (10) for use in determining the location of the apex of a patient's root, includes an electronic module (13) having a battery power source (13a), an impedance analyzer circuit (13b) and a radio frequency transmitter (13c); a grounding module (12) having a clip (15) for grounding the patient; a probe module (14) having an endodontic probe (21); and an associated but not physically connected display unit (11) having a receiver (31) for receiving radio frequency signals from the transmitter (13c). The display unit (11) has an electronic circuit that conditions the signals and interprets the signal for display on a graphic display (31).Type: ApplicationFiled: January 7, 2005Publication date: July 13, 2006Inventors: Randall Maxwell, Charles Garrott
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Publication number: 20060127842Abstract: An integrated dental system (10) includes a power connector base (11) having a plurality of electrical connectors (30) and a plurality of foot pedal connectors (31). A plurality of handpieces (12) are connected via their standard control units (20) to both the electrical connectors (30) and the foot pedal connectors (31). A single foot pedal (13) is employed to selectively operate and actuate each handpiece (12) as desired.Type: ApplicationFiled: December 15, 2004Publication date: June 15, 2006Inventors: Randall Maxwell, Charles Garrott