Patents by Inventor Allen A. Caldwell
Allen A. Caldwell 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: 11795760Abstract: A tripod assembly includes a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion along a longitudinal axis of the plurality of columns between a fully-extended position and a collapsed position. When the columns are collapsed from the fully-extended position each column substantially nests within another one of the columns. The plurality of columns are received within the central post when the plurality of columns is in the collapsed position. The bracket assembly is coupled to the second end of the connecting rod, and the bracket assembly is configured to receive a selectable rung of a ladder therein. The bracket member is coupled to an uppermost one of the columns, and the bracket member includes a channel configured to receive a second selectable rung of the ladder.Type: GrantFiled: October 12, 2020Date of Patent: October 24, 2023Assignee: Core Distribution, Inc.Inventors: Allen A. Caldwell, Mitchell I. Kieffer
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Publication number: 20210123302Abstract: The invention provides a tripod assembly comprising a plurality of legs, a central support member, and a central post. Each of the legs is pivotably coupled to the central support member. The central support member surrounds the central post. A plurality of columns is disposed in a nested arrangement for relative axial movement in a telescopic fashion along an axis of the plurality of columns between a fully-extended position and a collapsed position. The columns are received in the central post when the columns are in the collapsed position. A first end of a connecting rod is coupled to one of the columns. A bracket assembly is coupled to a second end of the connecting rod and is configured to receive a rung of a ladder therein. A bracket member is coupled to an uppermost column and includes a channel configured to receive a second rung of the ladder therein.Type: ApplicationFiled: October 12, 2020Publication date: April 29, 2021Inventors: Allen A. Caldwell, Mitchell I. Kieffer
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Patent number: 10753149Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.Type: GrantFiled: July 20, 2018Date of Patent: August 25, 2020Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
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Patent number: 10731413Abstract: A foldable ladder has a first ladder portion and a second ladder portion hingedly attached to the first ladder portion by a pair of hinge mechanisms. Each hinge mechanism adapted to lock the first and second ladder portions such that the first ladder portion and the second ladder portion form an angle therebetween. The hinge mechanism has a locking pin to lock the first and second ladder portions at an angular position. Each rung is connected to a column by a connector assembly having first and second release buttons.Type: GrantFiled: November 29, 2018Date of Patent: August 4, 2020Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell
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Publication number: 20190093428Abstract: A foldable ladder has a first ladder portion and a second ladder portion hingedly attached to the first ladder portion by a pair of hinge mechanisms. Each hinge mechanism adapted to lock the first and second ladder portions such that the first ladder portion and the second ladder portion form an angle therebetween. The hinge mechanism has a locking pin to lock the first and second ladder portions at an angular position. Each rung is connected to a column by a connector assembly having first and second release buttons.Type: ApplicationFiled: November 29, 2018Publication date: March 28, 2019Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell
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Patent number: 10233692Abstract: A foldable ladder has a first ladder portion and a second ladder portion hingedly attached to the first ladder portion by a pair of hinge mechanisms. Each hinge mechanism adapted to lock the first and second ladder portions such that the first ladder portion and the second ladder portion form an angle therebetween. The hinge mechanism has a locking pin to lock the first and second ladder portions at an angular position. Each rung is connected to a column by a connector assembly having first and second release buttons.Type: GrantFiled: February 9, 2017Date of Patent: March 19, 2019Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell
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Publication number: 20190003254Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.Type: ApplicationFiled: July 20, 2018Publication date: January 3, 2019Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schuleter, Matthew J. Decker
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Patent number: 10053912Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.Type: GrantFiled: September 22, 2017Date of Patent: August 21, 2018Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
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Publication number: 20180010388Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.Type: ApplicationFiled: September 22, 2017Publication date: January 11, 2018Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
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Publication number: 20170145745Abstract: A foldable ladder has a first ladder portion and a second ladder portion hingedly attached to the first ladder portion by a pair of hinge mechanisms. Each hinge mechanism adapted to lock the first and second ladder portions such that the first ladder portion and the second ladder portion form an angle therebetween. The hinge mechanism has a locking pin to lock the first and second ladder portions at an angular position. Each rung is connected to a column by a connector assembly having first and second release buttons.Type: ApplicationFiled: February 9, 2017Publication date: May 25, 2017Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell
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Patent number: 9580959Abstract: A foldable ladder has a first ladder portion and a second ladder portion hingedly attached to the first ladder portion by a pair of hinge mechanisms. Each hinge mechanism adapted to lock the first and second ladder portions such that the first ladder portion and the second ladder portion form an angle therebetween. The hinge mechanism has a shifting mechanism and a ladder angle selector coupled thereto to allow manual selection of the angle between the first and second ladder portions, and a locking pin to lock the first and second ladder portions at an angular position.Type: GrantFiled: December 2, 2014Date of Patent: February 28, 2017Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell
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Patent number: 9416591Abstract: A telescoping ladder includes a stabilizer connected to a stabilizer housing proximal to the floor surface on which the ladder is positioned. The first stabilizer can move between an extended position and a collapsed position. In the extended position, the first stabilizer extends out of a hollow body portion of the stabilizer housing and collapse into the hollow body portion of the rung in the collapsed position. The stabilizer comprises a locking button to lock the stabilizer in its extended position. The ladder comprises a flange that can release the locking button thereby unlocking the stabilizer from its extended position and move it into the collapsed position.Type: GrantFiled: December 2, 2014Date of Patent: August 16, 2016Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Allen A. Caldwell
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Publication number: 20160153231Abstract: A foldable ladder has a first ladder portion and a second ladder portion hingedly attached to the first ladder portion by a pair of hinge mechanisms. Each hinge mechanism adapted to lock the first and second ladder portions such that the first ladder portion and the second ladder portion form an angle therebetween. The hinge mechanism has a shifting mechanism and a ladder angle selector coupled thereto to allow manual selection of the angle between the first and second ladder portions, and a locking pin to lock the first and second ladder portions at an angular position.Type: ApplicationFiled: December 2, 2014Publication date: June 2, 2016Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell
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Publication number: 20160153232Abstract: A telescoping ladder includes a stabilizer connected to a stabilizer housing proximal to the floor surface on which the ladder is positioned. The first stabilizer can move between an extended position and a collapsed position. In the extended position, the first stabilizer extends out of a hollow body portion of the stabilizer housing and collapse into the hollow body portion of the rung in the collapsed position. The stabilizer comprises a locking button to lock the stabilizer in its extended position. The ladder comprises a flange that can release the locking button thereby unlocking the stabilizer from its extended position and move it into the collapsed position.Type: ApplicationFiled: December 2, 2014Publication date: June 2, 2016Inventors: Mitchell I. Kieffer, Allen A. Caldwell
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Publication number: 20160024738Abstract: Embodiments of methods, systems and apparatuses for vibrational soil mixing are described. In an embodiment, a method may include positioning a vibrational mixer relative to a region of soil to be mixed, the vibrational mixer comprising a vibration unit and a soil mixing unit. The method may also include causing the vibration unit to supply vibrational energy to the region of soil to be mixed. Additionally, the method may include causing the soil mixing element to mix the soil in the region of soil to be mixed.Type: ApplicationFiled: July 24, 2014Publication date: January 28, 2016Inventor: Christopher Allen Caldwell
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Publication number: 20120267197Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.Type: ApplicationFiled: June 26, 2012Publication date: October 25, 2012Applicant: CORE DISTRIBUTION, INC.Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
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Patent number: 8225906Abstract: An extendable/retractable ladder assembly includes a first stile and a second stile and a plurality of rungs extending therebetween. Each stile may comprise a plurality of columns disposed in a nested arrangement for relative axial movement in a telescopic fashion. A connector assembly connects the rungs to respective columns in the first and second stiles. The ladder has improved manufacturability since connector assemblies may be assembled before connecting the rungs to respective columns. The standing surface of the rungs may be angled such that it is rotated towards horizontal when the ladder assembly is leaned against a wall. A latch assembly may be used to selectively lock relative axial movement between adjacent columns. The latch assembly includes a locking pin assembly comprised of a central post and an outer metal sleeve. An air damper may also be used to control airflow through the columns.Type: GrantFiled: August 22, 2008Date of Patent: July 24, 2012Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
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Patent number: D624200Type: GrantFiled: September 10, 2009Date of Patent: September 21, 2010Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Allen A. Caldwell, Nathan L. Schlueter, Matthew J. Decker
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Patent number: D684278Type: GrantFiled: January 20, 2012Date of Patent: June 11, 2013Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, John Pat McCool, Allen Caldwell, Matthew Decker, Matthew Kunkel
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Patent number: D767784Type: GrantFiled: December 2, 2014Date of Patent: September 27, 2016Assignee: Core Distribution, Inc.Inventors: Mitchell I. Kieffer, Nathan L. Schlueter, Allen A. Caldwell