Patents by Inventor Robert Tod Whitfield
Robert Tod Whitfield 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: 9464767Abstract: A light emitting diode (LED) work light and associated method of controlling the LED work light. The LED work light includes a power source, a casing including a handle section, at least one LED mounted to illuminate light from the casing, at least one lens forward of the LEDs to focus light from the LEDs, a control switch designated to at least turn on and turn off the LEDs, and a controller. The controller may be configured to, in response to activation of the control switch, provide control of the power source to the LEDs to transition from a first illumination state to a second illumination state of the illumination of the LEDs, the transition being illumination defined by a specified function over time defined to slow a transition time of the transition.Type: GrantFiled: October 16, 2013Date of Patent: October 11, 2016Assignee: Cliplight Holdings, Ltd.Inventors: Robert Tod Whitfield, Donald L. Klipstein, Jack Brass, Lorne Hilts
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Patent number: 9297509Abstract: A work light has a head section with a single piece metal channel having a rear portion and opposing side flanges. The rear portion and side flanges extending longitudinally along the channel. Light has a handle section. LEDs are mounted on channel such that the channel is heatsink for the LEDs. A transparent single piece lens assembly covers the LEDs, the lens assembly has a corresponding plurality of convex lenses, each convex lens forward of each LED, the lens assembly attached to the rear portion of the channel. Forward edges of the side flanges of the channel extend farther forward from the rear surface than the lens assembly for protection.Type: GrantFiled: October 11, 2011Date of Patent: March 29, 2016Assignee: BRASSCORP LIMITEDInventors: Donald L. Klipstein, Robert Tod Whitfield
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Patent number: 9182089Abstract: A work light having a work light body including handle section and light head section, an elongate housing, a battery compartment and a component chamber longitudinally aligned within the housing, a battery, an LED circuit board assembly extending longitudinally within the housing and having a substrate layer, an external component layer on a first side of the substrate layer, and a driving component layer on an opposing second side of the substrate layer. Overlapping portion of the LED circuit board assembly in close proximity to the battery. Also, at least one LED on the external component layer, the external component layer facing transaxially outwardly from the housing such that light emitting from the LED emits from the light head section. At least one driving component on the driving component layer, all driving components placed on an extending portion of the LED circuit board assembly over the component chamber.Type: GrantFiled: June 24, 2014Date of Patent: November 10, 2015Assignee: BRASSCORP LIMITEDInventors: Robert Tod Whitfield, Donald L. Klipstein, Jack Brass
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Publication number: 20140307426Abstract: A work light having a work light body including handle section and light head section, an elongate housing, a battery compartment and a component chamber longitudinally aligned within the housing, a battery, an LED circuit board assembly extending longitudinally within the housing and having a substrate layer, an external component layer on a first side of the substrate layer, and a driving component layer on an opposing second side of the substrate layer. Overlapping portion of the LED circuit board assembly in close proximity to the battery. Also, at least one LED on the external component layer, the external component layer facing transaxially outwardly from the housing such that light emitting from the LED emits from the light head section. At least one driving component on the driving component layer, all driving components placed on an extending portion of the LED circuit board assembly over the component chamber.Type: ApplicationFiled: June 24, 2014Publication date: October 16, 2014Inventors: Robert Tod WHITFIELD, Donald L. KLIPSTEIN, Jack BRASS
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Patent number: 8789963Abstract: A work light having a work light body including handle section and light head section, an elongate housing, a battery compartment and a component chamber longitudinally aligned within the housing, a battery, an LED circuit board assembly extending longitudinally within the housing and having a substrate layer, an external component layer on a first side of the substrate layer, and a driving component layer on an opposing second side of the substrate layer. Overlapping portion of the LED circuit board assembly in close proximity to the battery. Also, at least one LED on the external component layer, the external component layer facing transaxially outwardly from the housing such that light emitting from the LED emits from the light head section. At least one driving component on the driving component layer, all driving components placed on an extending portion of the LED circuit board assembly over the component chamber.Type: GrantFiled: October 31, 2011Date of Patent: July 29, 2014Assignee: Brasscorp LimitedInventors: Robert Tod Whitfield, Donald L. Klipstein, Jack Brass
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Publication number: 20140036511Abstract: A light emitting diode (LED) work light and associated method of controlling the LED work light. The LED work light includes a power source, a casing including a handle section, at least one LED mounted to illuminate light from the casing, at least one lens forward of the LEDs to focus light from the LEDs, a control switch designated to at least turn on and turn off the LEDs, and a controller. The controller may be configured to, in response to activation of the control switch, provide control of the power source to the LEDs to transition from a first illumination state to a second illumination state of the illumination of the LEDs, the transition being illumination defined by a specified function over time defined to slow a transition time of the transition.Type: ApplicationFiled: October 16, 2013Publication date: February 6, 2014Applicant: Brasscorp LimitedInventors: Robert Tod WHITFIELD, Donald L. KLIPSTEIN, Jack BRASS, Lorne HILTS
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Patent number: 8562184Abstract: An LED work light has multichip LEDs and a diffusing dome. Each LED may have separate electrical terminals for each chip. The LED work light may have convex lenses forward of each LED. Convex lenses may be hemispherical. Convex lenses may have a nonhemispheric curved surface whose cross section has at least one circular arc and no non-circular arcs. The LED work light has a battery or receives power from an external power source. The LED work light may have a transparent plastic tube as a structural member. A replaceable plastic cover may be added to protect any structural tube or other major transparent part of the LED work light from abrasions. The plastic cover may be tubular. The plastic cover may comprise laminations of plastic that can be removed individually after being abraded. Any external power source may be a wall transformer type and may have current limiting means.Type: GrantFiled: November 4, 2008Date of Patent: October 22, 2013Assignee: Brasscorp LimitedInventors: Donald L. Klipstein, Jack Brass, Robert Tod Whitfield
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Publication number: 20120212944Abstract: A work light having a work light body including handle section and light head section, an elongate housing, a battery compartment and a component chamber longitudinally aligned within the housing, a battery, an LED circuit board assembly extending longitudinally within the housing and having a substrate layer, an external component layer on a first side of the substrate layer, and a driving component layer on an opposing second side of the substrate layer. Overlapping portion of the LED circuit board assembly in close proximity to the battery. Also, at least one LED on the external component layer, the external component layer facing transaxially outwardly from the housing such that light emitting from the LED emits from the light head section. At least one driving component on the driving component layer, all driving components placed on an extending portion of the LED circuit board assembly over the component chamber.Type: ApplicationFiled: October 31, 2011Publication date: August 23, 2012Applicant: BRASSCORP LIMITEDInventors: Robert Tod WHITFIELD, Donald L. KLIPSTEIN, Jack BRASS
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Publication number: 20120176767Abstract: An LED work light, having a housing comprising a head section, and a foot section and a handle section each connected by hinges between the head section and the handle section and between the handle section and the foot section. The head section and foot section are hinged about the handle section by hinge means. Light is produced by one or more LEDs in the head section. Knobs are used to continuously adjust between magnitude of overall light output and excess-vs-insufficiency of red spectral content in the light produced by the LED work light. Magnitude of light produced is selected by choice of pushbuttons. Heat produced by LEDs and dissipated into the head section can be conducted from the head section to the handle section by the hinge means used to connect the head section to the handle section.Type: ApplicationFiled: September 12, 2011Publication date: July 12, 2012Applicant: Brasscorp LimitedInventors: Robert Tod Whitfield, Donald L. Klipstein, Jack Brass
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Publication number: 20120113636Abstract: A work light has a head section with a single piece metal channel having a rear portion and opposing side flanges. The rear portion and side flanges extending longitudinally along the channel. Light has a handle section. LEDs are mounted on channel such that the channel is heatsink for the LEDs. A transparent single piece lens assembly covers the LEDs, the lens assembly has a corresponding plurality of convex lenses, each convex lens forward of each LED, the lens assembly attached to the rear portion of the channel. Forward edges of the side flanges of the channel extend farther forward from the rear surface than the lens assembly for protection.Type: ApplicationFiled: October 11, 2011Publication date: May 10, 2012Applicant: BRASSCORP LIMITEDInventors: Donald L. KLIPSTEIN, Robert Tod WHITFIELD
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Patent number: 8033681Abstract: A light comprising an LED whose light intensity decreases as the angle from an axis of the LED increases, and a convex lens associated with the LED such that a beam width of the LED is concentrated by the lens into a narrower beam width, wherein the convex lens includes both a convex surface and a concave surface, and the concave surface is curved more sharply towards its edge than towards its center such that light is more evenly spread across the beam width of the lens.Type: GrantFiled: June 29, 2009Date of Patent: October 11, 2011Assignee: Basscorp LimitedInventors: Jack Brass, Donald L. Klipstein, Sarah Dobbin, Robert Tod Whitfield, Bjarki Hallgrimsson, Lorne Hilts
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Patent number: 7758204Abstract: An LED spotlight is made with at least one light emitting diode and a lens placed forward of the light emitting diode to collimate the light from the light emitting diode into a beam. The light emitting diode is preferably a type with a nominal power of at least 1 watt, requiring heatsinking, and having a nominal radiation pattern width of 100 degrees or more. The lens is preferably concavo-convex. The lens can have a thickness less than the distance between the rear surface of the lens and the light emitting diode. The LED spotlight can be mounted on headwear that would be worn on a person's head. The LED spotlight can be in the form of a flashlight. The LED spotlight can be in the form of an inspection lamp suitable for causing visible fluorescence of fluorescent materials, such as leaks of fluids that have suitable fluorescent dyes.Type: GrantFiled: January 26, 2007Date of Patent: July 20, 2010Assignee: Brasscorp LimitedInventors: Donald L. Klipstein, Jack Brass, Robert Tod Whitfield
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Publication number: 20100008082Abstract: A light comprising an LED whose light intensity decreases as the angle from an axis of the LED increases, and a convex lens associated with the LED such that a beam width of the LED is concentrated by the lens into a narrower beam width, wherein the convex lens includes both a convex surface and a concave surface, and the concave surface is curved more sharply towards its edge than towards its center such that light is more evenly spread across the beam width of the lens.Type: ApplicationFiled: June 29, 2009Publication date: January 14, 2010Applicant: BRASSCORP LIMITEDInventors: Jack Brass, Donald L. Klipstein, Sarah Dobbin, Robert Tod Whitfield, Bjarkl Hallgrimsson, Lorne Hilts
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Patent number: 7553051Abstract: Work light has LEDs that require heatsink. Desired radiation pattern achieved by using optical components designed to produce beam or LEDs may have beams in different directions. Radiation pattern of LEDs may be changed by refractive-reflective optics or by convex lenses. Convex lenses may be hemispheres, other planoconvex shapes, concavo-convex shapes, or other shapes. Curved surfaces on any lenses may be spherical or aspheric. Ballast to operate the LEDs from line voltage AC or low voltage DC. Work light may contain batteries. The work light may be mounted on a stand. May have accessory mount. May have charging station. May have a paging transmitter to activate a paging receiver in work light. May have openings for heat transfer from heatsink to ambient air external to light.Type: GrantFiled: March 18, 2005Date of Patent: June 30, 2009Assignee: Brasscorp LimitedInventors: Jack Brass, Donald L. Klipstein, Sarah Dobbin, Robert Tod Whitfield, Bjarki Hallgrimsson, Lorne Hilts
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Publication number: 20090147519Abstract: An LED work light has multichip LEDs and a diffusing dome. Each LED may have separate electrical terminals for each chip. The LED work light may have convex lenses forward of each LED. Convex lenses may be hemispherical. Convex lenses may have a nonhemispheric curved surface whose cross section has at least one circular arc and no non-circular arcs. The LED work light has a battery or receives power from an external power source. The LED work light may have a transparent plastic tube as a structural member. A replaceable plastic cover may be added to protect any structural tube or other major transparent part of the LED work light from abrasions. The plastic cover may be tubular. The plastic cover may comprise laminations of plastic that can be removed individually after being abraded. Any external power source may be a wall transformer type and may have current limiting means.Type: ApplicationFiled: November 4, 2008Publication date: June 11, 2009Applicant: BRASSCORP LIMITEDInventors: Donald L. Klipstein, Jack Brass, Robert Tod Whitfield