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公开(公告)号：US11370042B1
公开(公告)日：2022-06-28
申请号：US17124421
申请日：2020-12-16
发明人： Chung Tsai
摘要： A cutter includes a blade, a handle, a holder, a pivot and a pin. The blade includes an aperture and a slit. The handle includes two lateral plates each of which includes an aperture and a recess. The holder includes a block formed between two lateral plates. The block is inserted in the slit when the blade is inserted in the holder. Each of the lateral plates of the holder includes a rear aperture and a front aperture. The pivot is selectively inserted in the apertures of the handle, the front apertures of the holder and the aperture of the blade to keep the holder in the handle. The pin is selectively inserted in the recesses of the handle and the rear apertures of the holder to keep the holder in a desired angle relative to the handle.
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公开(公告)号：US09789615B2
公开(公告)日：2017-10-17
申请号：US14921959
申请日：2015-10-23
发明人： Chung Tsai
摘要： A cutter includes two handles, a blade, a cutting board, an angle holder, two screws, a spring-biased lock and a releasing element. The cutting board is supported on the first handle. The blade is connected to the second handle. The angle holder includes teeth and a cutout. The angle holder is attached to the first handle by the screws. The releasing element is pivotally connected to the first handle and includes a slot. The spring-biased lock is pivotally connected to the first handle. The spring-biased lock is allowed to engage with the teeth or enter the cutout when an end of the slot is placed against one of the screws. The spring-biased lock is removed from the teeth and the cutout when another end of the slot is placed against the screw.
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公开(公告)号：US11173619B1
公开(公告)日：2021-11-16
申请号：US17092328
申请日：2020-11-09
发明人： Chung Tsai
摘要： A cutter includes a platform, two handles, a blade, a lever, two pawls, a helical spring and a torque spring. The platform is connected to the first handle. The lever includes a ratchet formed at a rear end and a block formed on a side. The blade includes a rear end formed with a slit for receiving the block. The first pawl is pivotally connected to the second handle. The torque spring includes an end in contact with the first pawl and another end in contact with the second handle for keeping a tip of the first pawl engaged with the ratchet of the lever. The second pawl and the handles are pivotally connected to one another. A helical spring includes an end connected to the second pawl and another end connected to the lever. The tips of the pawls are alternately engaged with the ratchet.
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公开(公告)号：US20220184718A1
公开(公告)日：2022-06-16
申请号：US17124421
申请日：2020-12-16
发明人： Chung Tsai
摘要： A cutter includes a blade, a handle, a holder, a pivot and a pin. The blade includes an aperture and a slit. The handle includes two lateral plates each of which includes an aperture and a recess. The holder includes a block formed between two lateral plates. The block is inserted in the slit when the blade is inserted in the holder. Each of the lateral plates of the holder includes a rear aperture and a front aperture. The pivot is selectively inserted in the apertures of the handle, the front apertures of the holder and the aperture of the blade to keep the holder in the handle. The pin is selectively inserted in the recesses of the handle and the rear apertures of the holder to keep the holder in a desired angle relative to the handle.
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公开(公告)号：US20180215032A1
公开(公告)日：2018-08-02
申请号：US15419164
申请日：2017-01-30
发明人： Chung Tsai
CPC分类号： B26B5/006
摘要： A process for making a holder for a scraper includes the step of providing a metal sheet. Then, the metal sheet is cut into a semi-product. The semi-product includes a transverse strip including at least one slit to provide at least one flip, a middle longitudinal strip extending from the transverse strip, and two longitudinal strips extending from the transverse strip. Then, the semi-product is pressed to bend the flip from the transverse strip and turn the slit into apertures. The flip is used as a lower jaw and other portions of the transverse strip are used as upper jaws.
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公开(公告)号：US20170113364A1
公开(公告)日：2017-04-27
申请号：US14921959
申请日：2015-10-23
发明人： Chung Tsai
摘要： A cutter includes two handles, a blade, a cutting board, an angle holder, two screws, a spring-biased lock and a releasing element. The cutting board is supported on the first handle. The blade is connected to the second handle. The angle holder includes teeth and a cutout. The angle holder is attached to the first handle by the screws. The releasing element is pivotally connected to the first handle and includes a slot. The spring-biased lock is pivotally connected to the first handle. The spring-biased lock is allowed to engage with the teeth or enter the cutout when an end of the slot is placed against one of the screws. The spring-biased lock is removed from the teeth and the cutout when another end of the slot is placed against the screw.
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公开(公告)号：US20200070228A1
公开(公告)日：2020-03-05
申请号：US16117474
申请日：2018-08-30
发明人： Chung Tsai
IPC分类号： B21D3/02
摘要： A straightening apparatus includes a primary plate, a movable plate, upper and lower pressing wheels and a guiding wheel. The movable plate is movable relative to the primary plate between an open position and a closed position. The upper pressing wheels are connected to the movable plate. The lower pressing wheels are connected to the primary plate. The guiding wheel is connected to the primary plate. The upper pressing wheels are located closer to the lower pressing wheels in the closed position than the open position. The tube can be located between the upper and lower pressing wheels in the open position. The upper and lower wheels together provide a straightening passage for straightening the tube in the closed position. The tube is pressed by the guiding wheel before the tube is straightened in the straightening passage.
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