Patents by Inventor Julian Liu
Julian Liu 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: 8573613Abstract: There is provided a foldable walker apparatus with a wheel fork and a frame portion having a first end facing the wheel fork, a first bore extending from the first end towards a second end opposite thereof, an exterior disposed between the first end of the frame portion and the second end of the frame portion, and a second bore disposed between the first end of the frame portion and the second end of the frame portion. The second bore extends from the exterior of the frame portion to the first bore in a direction generally perpendicular to the first bore. A shaft couples with the first bore and includes a recess facing the second bore. A bearing outer race couples to the wheel fork and a bearing inner race couples to the shaft. A securing member extends through the second bore and engages with the recess of the shaft.Type: GrantFiled: October 29, 2010Date of Patent: November 5, 2013Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Patent number: 8517399Abstract: There is provided a walker apparatus having a pair of upright, spaced-apart elongate members. Each elongate member includes an upper end for placing one's hands and a lower end spaced-apart from the upper end. A first pair of ground-engaging wheels are rotatably mounted to the elongate members at the lower ends. The apparatus includes a pair of support members that are spaced-apart and arc-shaped. The support members align respectively with and extend from the elongate members to distal ends of the support members. The support members have apexes extending towards the upper ends of the elongate members. A second pair of ground-engaging wheels operatively connect to the distal ends of the support members. The apparatus includes a seat for resting connecting to the apexes of the support members, the support members thereby supporting the seat.Type: GrantFiled: October 11, 2011Date of Patent: August 27, 2013Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Patent number: 8505936Abstract: There is provided a wheel mounting assembly having a wheel fork. The fork includes an interior and an inwardly extending protrusion disposed within the interior. The assembly includes a rotatable member operatively connected to the fork and disposed within the interior of the fork. The protrusion abuts and positions in place the rotatable member. The assembly includes a shaft. The rotatable member rotatably connects the shaft to the wheel fork. The assembly includes a retaining member connected to the shaft. The retaining member is configured to abut the protrusion of the fork and thus inhibit dislodgement of the rotatable member from the fork when the shaft is tilted relative to the fork.Type: GrantFiled: October 28, 2011Date of Patent: August 13, 2013Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Patent number: 8454034Abstract: There is provided a brake pad assembly for a walker apparatus. The walker apparatus has a frame and a wheel pivotally connected to the frame. The assembly includes a brake pad mechanism having a brake pad. The brake pad mechanism is spring-biased to position the brake pad spaced-apart from and adjacent to the wheel. The brake pad mechanism is configured to cause the brake pad to abut the wheel when the brake pad mechanism is actuated. The assembly includes an arch-shaped brake housing. The brake pad mechanism pivotally mounts to the arch-shaped brake housing. The arch-shaped brake housing extends completely over the brake pad mechanism for fully protecting the brake pad mechanism.Type: GrantFiled: July 20, 2012Date of Patent: June 4, 2013Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Patent number: 8448960Abstract: There is provided a walker apparatus having a brake, a braking handle, a brake wire, a brake rod, and a brake rod assembly. A gripping member connects to the brake wire. The gripping member includes a plate having a first end, a second end and an aperture near the second end. The plate connects to the brake wire near the first end and the plate slidably receives the brake rod through the aperture near the second end. The gripping member includes a clamp that engages the brake wire via a set screw. The gripping member is spring-biased to remain free of the brake rod in a non-actuated mode. When the braking handle actuates the brake wire, the plate tilts with the first end elevating relative to the second end, thereby causing the plate to engage with and abut the brake rod for thereby actuating the brake rod to brake.Type: GrantFiled: July 13, 2012Date of Patent: May 28, 2013Inventor: Julian Liu
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Publication number: 20120299272Abstract: A foldable walker apparatus includes a pair of spaced-apart inner frame members of two parts each hinged together, with a pair of link members diagonally extending therebetween. Each link has a bend extending upwardly and outwardly. The walker has support members that are arc-shaped with a seat extending between their apexes. A collapsible basket is provided with two end members each having a rigid peripheral portion connecting the frame members and a basket member of flexible fabric extending therebetween. A self-adjusting brake rod is provided with a gripping member spring-biased to remain free of the brake rod until the gripping member is operatively actuated to engage and thereby actuate the brake rod. A brake housing fully extends around a brake pad mechanism, including a means for connecting and adjusting the corresponding brake pad, to at least the outer periphery of one of the wheels for fully protecting the brake pad mechanism.Type: ApplicationFiled: May 25, 2011Publication date: November 29, 2012Inventor: Julian Liu
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Publication number: 20120286488Abstract: There is provided a brake pad assembly for a walker apparatus. The walker apparatus has a frame and a wheel pivotally connected to the frame. The assembly includes a brake pad mechanism having a brake pad. The brake pad mechanism is spring-biased to position the brake pad spaced-apart from and adjacent to the wheel. The brake pad mechanism is configured to cause the brake pad to abut the wheel when the brake pad mechanism is actuated. The assembly includes an arch-shaped brake housing. The brake pad mechanism pivotally mounts to the arch-shaped brake housing. The arch-shaped brake housing extends completely over the brake pad mechanism for fully protecting the brake pad mechanism.Type: ApplicationFiled: July 20, 2012Publication date: November 15, 2012Inventor: Julian LIU
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Publication number: 20120280463Abstract: There is provided a walker apparatus having a brake, a braking handle, a brake wire, a brake rod, and a brake rod assembly. A gripping member connects to the brake wire. The gripping member includes a plate having a first end, a second end and an aperture near the second end. The plate connects to the brake wire near the first end and the plate slidably receives the brake rod through the aperture near the second end. The gripping member includes a clamp that engages the brake wire via a set screw. The gripping member is spring-biased to remain free of the brake rod in a non-actuated mode. When the braking handle actuates the brake wire, the plate tilts with the first end elevating relative to the second end, thereby causing the plate to engage with and abut the brake rod for thereby actuating the brake rod to brake.Type: ApplicationFiled: July 13, 2012Publication date: November 8, 2012Inventor: Julian Liu
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Publication number: 20120233767Abstract: The present invention relates to a bath seat. The bath seat has a top and a pair of centrally disposed and spaced-apart drainage holes in communication with the top. The top of the seat includes a channel extending between the drainage holes. The channel has an enlarged first end, an enlarged second end and a connecting portion connecting the ends of the channel together. Fluid entering into the channel is directed to the drainage holes and thereby drains from the seat.Type: ApplicationFiled: March 17, 2011Publication date: September 20, 2012Inventor: Julian Liu
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Patent number: 8267412Abstract: There is provided a walker apparatus having a frame, a wheel pivotally connected to the frame, and a brake pad assembly. The assembly has a brake housing configured to partially cover the wheel. The assembly has a brake pad mechanism including a brake pad lever pivotally mounted to the housing. The brake pad lever is actuated via a first end and has a second end spaced-apart therefrom. The brake pad mechanism has a brake pad connected to the brake pad lever adjacent to the second end of the brake pad lever. The brake pad lever is spring-biased to position the brake pad spaced-apart from and adjacent to the wheel. The brake pad lever is configured to cause the brake pad to abut the wheel when the lever is actuated. The brake housing extends about the brake pad mechanism for fully protecting the brake pad mechanism.Type: GrantFiled: October 11, 2011Date of Patent: September 18, 2012Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Patent number: 8251380Abstract: There is provided a walker apparatus having a brake, a braking handle, a brake wire, a brake rod, and a brake rod assembly. A gripping member connects to the brake wire. The gripping member includes a plate having a first end, a second end and an aperture near the second end. The plate connects to the brake wire near the first end and the plate slidably receives the brake rod through the aperture near the second end. The gripping member includes a clamp that engages the brake wire via a set screw. The gripping member is spring-biased to remain free of the brake rod in a non-actuated mode. When the braking handle actuates the brake wire, the plate tilts with the first end elevating relative to the second end, thereby causing the plate to engage with and abut the brake rod for thereby actuating the brake rod to brake.Type: GrantFiled: October 19, 2011Date of Patent: August 28, 2012Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Publication number: 20120133106Abstract: There is provided a wheel mounting assembly having a wheel fork. The fork includes an interior and an inwardly extending protrusion disposed within the interior. The assembly includes a rotatable member operatively connected to the fork and disposed within the interior of the fork. The protrusion abuts and positions in place the rotatable member. The assembly includes a shaft. The rotatable member rotatably connects the shaft to the wheel fork. The assembly includes a retaining member connected to the shaft. The retaining member is configured to abut the protrusion of the fork and thus inhibit dislodgement of the rotatable member from the fork when the shaft is tilted relative to the fork.Type: ApplicationFiled: October 28, 2011Publication date: May 31, 2012Inventor: Julian Liu
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Publication number: 20120104710Abstract: There is provided a foldable walker apparatus with a wheel fork and a frame portion having a first end facing the wheel fork, a first bore extending from the first end towards a second end opposite thereof, an exterior disposed between the first end of the frame portion and the second end of the frame portion, and a second bore disposed between the first end of the frame portion and the second end of the frame portion. The second bore extends from the exterior of the frame portion to the first bore in a direction generally perpendicular to the first bore. A shaft couples with the first bore and includes a recess facing the second bore. A bearing outer race couples to the wheel fork and a bearing inner race couples to the shaft. A securing member extends through the second bore and engages with the recess of the shaft.Type: ApplicationFiled: October 29, 2010Publication date: May 3, 2012Inventor: Julian LIU
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Publication number: 20120043739Abstract: There is provided, in combination, a collapsible walker and a collapsible basket. The walker includes a pair of spaced-apart, operatively interconnected frame members. The frame members each have an upper end for placing one's hand and a lower end spaced-apart from the upper end. Ground-engaging wheels are rotatably mounted to the lower ends of the frame members. A folding mechanism allows the frame members to be brought together for folding the walker. The collapsible basket includes a pair of spaced-apart, rigid end members, each being connectable with a respective one of said frame members. A flexible basket member extends substantially about, extends between and is supported by the rigid end members. The end members are moveable towards each other and the basket member thereby folds to collapse the basket when folding the walker.Type: ApplicationFiled: November 2, 2011Publication date: February 23, 2012Inventor: Julian Liu
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Publication number: 20120032410Abstract: There is provided a walker apparatus having a frame, a wheel pivotally connected to the frame, and a brake pad assembly. The assembly has a brake housing configured to partially cover the wheel. The assembly has a brake pad mechanism including a brake pad lever pivotally mounted to the housing. The brake pad lever is actuated via a first end and has a second end spaced-apart therefrom. The brake pad mechanism has a brake pad connected to the brake pad lever adjacent to the second end of the brake pad lever. The brake pad lever is spring-biased to position the brake pad spaced-apart from and adjacent to the wheel. The brake pad lever is configured to cause the brake pad to abut the wheel when the lever is actuated. The brake housing extends about the brake pad mechanism for fully protecting the brake pad mechanism.Type: ApplicationFiled: October 11, 2011Publication date: February 9, 2012Inventor: Julian Liu
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Publication number: 20120032407Abstract: There is provided a walker apparatus having a brake, a braking handle, a brake wire, a brake rod, and a brake rod assembly. A gripping member connects to the brake wire. The gripping member includes a plate having a first end, a second end and an aperture near the second end. The plate connects to the brake wire near the first end and the plate slidably receives the brake rod through the aperture near the second end. The gripping member includes a clamp that engages the brake wire via a set screw. The gripping member is spring-biased to remain free of the brake rod in a non-actuated mode. When the braking handle actuates the brake wire, the plate tilts with the first end elevating relative to the second end, thereby causing the plate to engage with and abut the brake rod for thereby actuating the brake rod to brake.Type: ApplicationFiled: October 19, 2011Publication date: February 9, 2012Inventor: Julian Liu
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Publication number: 20120025483Abstract: There is provided a walker apparatus having a pair of upright, spaced-apart elongate members. Each elongate member includes an upper end for placing one's hands and a lower end spaced-apart from the upper end. A first pair of ground-engaging wheels are rotatably mounted to the elongate members at the lower ends. The apparatus includes a pair of support members that are spaced-apart and arc-shaped. The support members align respectively with and extend from the elongate members to distal ends of the support members. The support members have apexes extending towards the upper ends of the elongate members. A second pair of ground-engaging wheels operatively connect to the distal ends of the support members. The apparatus includes a seat for resting connecting to the apexes of the support members, the support members thereby supporting the seat.Type: ApplicationFiled: October 11, 2011Publication date: February 2, 2012Inventor: Julian Liu
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Patent number: 8083239Abstract: A foldable walker apparatus includes a pair of spaced-apart inner frame members of two parts each hinged together, with a pair of link members diagonally extending therebetween. Each link has a bend extending upwardly and outwardly. The walker has support members that are arc-shaped with a seat extending between their apexes. A collapsible basket is provided with two end members each having a rigid peripheral portion connecting the frame members and a basket member of flexible fabric extending therebetween. A self-adjusting brake rod is provided with a gripping member spring-biased to remain free of the brake rod until the gripping member is operatively actuated to engage and thereby actuate the brake rod. A brake housing fully extends around a brake pad mechanism, including a means for connecting and adjusting the corresponding brake pad, to at least the outer periphery of one of the wheels for fully protecting the brake pad mechanism.Type: GrantFiled: October 8, 2008Date of Patent: December 27, 2011Assignee: Evolution Technologies Inc.Inventor: Julian Liu
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Publication number: 20100083994Abstract: A foldable walker apparatus includes a pair of spaced-apart inner frame members of two parts each hinged together, with a pair of link members diagonally extending therebetween. Each link has a bend extending upwardly and outwardly. The walker has support members that are arc-shaped with a seat extending between their apexes. A collapsible basket is provided with two end members each having a rigid peripheral portion connecting the frame members and a basket member of flexible fabric extending therebetween. A self-adjusting brake rod is provided with a gripping member spring-biased to remain free of the brake rod until the gripping member is operatively actuated to engage and thereby actuate the brake rod. A brake housing fully extends around a brake pad mechanism, including a means for connecting and adjusting the corresponding brake pad, to at least the outer periphery of one of the wheels for fully protecting the brake pad mechanism.Type: ApplicationFiled: October 8, 2008Publication date: April 8, 2010Inventor: Julian Liu
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Patent number: 7043742Abstract: A protective cover for a data storage disc such as a compact disc (CD) includes a disc which has a central retainer for engaging the hole in the data storage disc. The protective cover may placed on both the data storage side and the opposite side of the data storage disc. In one embodiment the retainer consists of a plurality of upstanding members disposed on one side of the protective cover, and a corresponding plurality of cavities disposed on the other side of the protective cover. The cavities of one protective cover receive the upstanding members of another protective cover so that a plurality of protective covers may be stacked.Type: GrantFiled: April 5, 2005Date of Patent: May 9, 2006Inventor: Julian Liu