Patents by Inventor David A. Purcell
David A. Purcell 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: 20230337873Abstract: A collapsible wheeled walker with two side frames and two height adjustable upper body supports. Each upper body support includes a height adjustment tube. And each height adjustment tube may be set to a recoupable height by a height memory device coupled to the height adjustment tube for quick an easy height setting. The apparatus may include a seat that is slidably attached to the two side frames and is movable between a front position to facilitate an ample walking space inside the frames and a rear position for a user to sit. It may include an X-folder that facilitates collapsing the walker to a small footprint It may also include two forearm gutters as, part of the upper both supports that give the user an upright walking posture for health benefits.Type: ApplicationFiled: April 22, 2022Publication date: October 26, 2023Inventors: David A Purcell, Yichuan Pan
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Patent number: 10828226Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: GrantFiled: March 10, 2020Date of Patent: November 10, 2020Assignee: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20200206068Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: ApplicationFiled: March 10, 2020Publication date: July 2, 2020Applicant: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A. Purcell, Nebojsa Sataric
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Patent number: 10588815Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: GrantFiled: April 29, 2019Date of Patent: March 17, 2020Assignee: Protostar, Inc.Inventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20190254918Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: ApplicationFiled: April 29, 2019Publication date: August 22, 2019Applicant: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A. Purcell, Nebojsa Sataric
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Patent number: 10322056Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: GrantFiled: August 28, 2018Date of Patent: June 18, 2019Assignee: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20180360686Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: ApplicationFiled: August 28, 2018Publication date: December 20, 2018Applicant: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20180280226Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: ApplicationFiled: January 25, 2017Publication date: October 4, 2018Applicant: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Patent number: 10085909Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: GrantFiled: January 25, 2017Date of Patent: October 2, 2018Assignee: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20170319424Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: ApplicationFiled: January 25, 2017Publication date: November 9, 2017Applicant: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20170258664Abstract: An upright wheeled walker with bilateral stabilizing wheel suspensions, and an automatic braking system integrated with obstacle avoidance systems, terrain sensors and user feedback controls. The walker provides user upper body weight support in a wheeled walker with a user safety system including a plurality of sensor, processor and control elements and an automatic braking system for avoiding unseen obstacles and automatic speed limiting on inclines.Type: ApplicationFiled: January 26, 2017Publication date: September 14, 2017Applicant: Protostar, Inc., a Delaware CorporationInventor: David A. Purcell
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Patent number: 9585807Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: GrantFiled: May 6, 2016Date of Patent: March 7, 2017Assignee: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A Purcell, Nebojsa Sataric
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Publication number: 20160331626Abstract: A collapsible upright wheeled walker with adjustable armrests that support sufficient user upper-body weight to facilitate a natural upright gait and provide unassisted mobility for a wide range of mobility-impaired individuals. The apparatus may be easily and quickly folded (and unfolded) and may include bilateral stabilizing wheel suspensions to facilitate navigation over uneven terrain. The apparatus includes a frame-stiffening folder assembly and may also include mechanical brakes, an adjustable upper armrest assembly with removable padded forearm supports and two pairs of handles, at least one of which is disposed sufficiently forward to place the user within the polygonal footprint defined by the front and rear wheels to provide support without leaning, stooping, or risking falls.Type: ApplicationFiled: May 6, 2016Publication date: November 17, 2016Applicant: Protostar, Inc., a Delaware CorporationInventors: Peter James Fellingham, Yichuan Pan, David A. Purcell, Nebojsa Sataric
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Patent number: 6565197Abstract: An ink jet printer having an inking system that includes an ink jet cartridge, a large ink reservoir mounted inside the housing of the ink jet printer at a location which is remote from the ink jet cartridge and tubing connecting the ink reservoir to the ink jet cartridge. The large ink reservoirs may be pancake shaped, and may be stacked in side by side horizontal manner within the housing. A portion of the reservoir is transparent, and is visible to the operator for operator monitoring of ink level through openings in the printer housing placed in juxtaposition with the transparent portion of the large ink reservoirs.Type: GrantFiled: November 10, 1997Date of Patent: May 20, 2003Assignee: Encad, Inc.Inventors: Richard A. Murray, William M. Fries, David A. Purcell
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Patent number: 6375298Abstract: An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.Type: GrantFiled: February 23, 2001Date of Patent: April 23, 2002Assignee: Encad, Inc.Inventors: David A. Purcell, Richard A. Murray, Dan J. Dull
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Patent number: 6347857Abstract: A droplet deposition analysis system for an ink jet printer including a flexible transparent substrate. The printer may include a light source on one side of the substrate, and an optical detector on the other side of the substrate.Type: GrantFiled: September 23, 1999Date of Patent: February 19, 2002Assignee: Encad, Inc.Inventors: David A. Purcell, David A. Neese, Warren Free
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Publication number: 20010007458Abstract: An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.Type: ApplicationFiled: February 23, 2001Publication date: July 12, 2001Inventors: David A. Purcell, Richard A. Murray, Dan J. Dull
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Patent number: 6227643Abstract: An ink jet printer with intelligent components includes an ink jet cartridge and a roll of print media, each of which incorporate memory elements. Environmental sensors such as temperature and humidity sensors may also be provided. Data from the memory elements and environmental sensors is used to optimize printer operations, and to provide additional information to printer operators.Type: GrantFiled: February 25, 1998Date of Patent: May 8, 2001Assignee: ENCAD, Inc.Inventors: David A. Purcell, Richard A. Murray, Dan J. Dull
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Patent number: 5686947Abstract: An ink jet printer having an inking system that includes an ink jet cartridge, a large ink reservoir mounted inside the housing of the ink jet printer at a location which is remote from the ink jet cartridge and tubing connecting the ink reservoir to the ink jet cartridge. The large ink reservoirs may be pancake shaped, and may be stacked in side by side horizontal manner within the housing. A portion of the reservoir is transparent, and is visible to the operator for operator monitoring of ink level through openings in the printer housing placed in juxtaposition with the transparent portion of the large ink reservoirs.Type: GrantFiled: May 3, 1995Date of Patent: November 11, 1997Assignee: ENCAD, Inc.Inventors: Richard A. Murray, William M. Fries, David A. Purcell