Patents by Inventor Cheng Hok Aw
Cheng Hok Aw 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: 11255643Abstract: The present invention describes an air-burst projectile (100) and a system (200) for deploying the airburst projectile to counter an unmanned aerial vehicle (UAV) 10. Each airburst projectile includes one or more spinners (140, 140a-140d); each spinner has a sleeve or a tube (146), a number of radial partition plates (148, 148a-148d) extending from the sleeve/tube and an annular rear plate (144) connected to the sleeve. Adjacent partition plates thus form a compartment (150). Disposed in each compartment is a streamer or streamers (170,170a,170b), which are formed in a coiled-up state. When the airburst projectile is deployed into a flight path of a target UAV, the spinners (140, 140a-140d) are ejected and the streamers (170,170a,170b) are dispersed in the flight path to create a streamer cloud, so that a streamer may entangle with propellers of the UAV and bring down the UAV, or as a warning or fence marking shot.Type: GrantFiled: January 31, 2019Date of Patent: February 22, 2022Inventors: Wen Jun Edwin Ang, Yong Peng Tan, Juan Kiat Quek, Ce Yu Poo, Yuen Hoong Benedict Woo, Cheng Hok Aw
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Patent number: 11199384Abstract: The present invention discloses a lightweight hybrid cartridge case (100) for a cartridged ammunition and a method of manufacture (200). The lightweight hybrid cartridge case (100) includes a cap (110) with a cylindrical sidewall (112) connected a base (120); a polymer shell (150) is insert-molded onto the sidewall of the cap; and an overmolded sleeve (180) is formed to cover the metal-polymer joint between the cap (110) and the polymer sleeve (150). The cylindrical sidewall (112) covered by the overmolded sleeve (180) has a plurality of stepped ridges (132, 132a), preferably with one stepped ridge (133) having a C-stepped edge (134).Type: GrantFiled: February 1, 2019Date of Patent: December 14, 2021Inventors: Chun Kang Koh, Juan Kiat Quek, Su Shan Ng, Wen Jun Edwin Ang, Cheng Hok Aw
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Patent number: 11193742Abstract: This invention describes embodiments of door breaching grenades (100,100a,100b,100c,100d). Each grenade comprises a projectile (101,101a,101b,101c,101d) coupled to a propulsion cartridge (105); each projectile comprises a shell (110), a body member (140) and an ogive (180). A safe-and-arm mechanism (150) is located in the body member. A seat member (160) and a plunger (166) are assembled on a forward face of the body member so that a leading end of the plunger is in contact with an inside tip surface of the ogive, or a hollow guide member (184) is integrally formed with an inside tip surface of the ogive. In the armed state, upon impacting on a door/barricade (5), the plunger or hollow guide/sleeve impinges on a detonator pin (164), which then sets off a chain of explosive charges (152, 120, 122) whilst the projectile is still outside the door/barricade. The grenade is made substantially of polymer parts.Type: GrantFiled: January 31, 2019Date of Patent: December 7, 2021Inventors: Su Shan Ng, Yuen Hoong Benedict Woo, Juan Kiat Quek, Cheng Hok Aw
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Patent number: 11054219Abstract: A wearable programming unit (WPU) (1 10, 1 10a-1 10b) for assisting a user deploy air burst munition (ABM, 10) from a rifle (20) in an intuitive manner is described. The WPU has a ballistic processor (112), wireless communication channels (120), a vibrator (130), a display (130), a mode button (150) and up/down select buttons (160, 161). After an ABM is selected and loaded into the rifle, and a deployment distance entered in the WPU, the ballistic processor calculates and outputs a time of burst T and barrel angle alpha. The barrel angle alpha is received by a sighting unit (104) and appears as a target marker. Once the rifle is tilted and/or moved so that a centre of the sighting unit coincides with the target marker, the WPU vibrates as a signal to the user to trigger the rifle.Type: GrantFiled: August 7, 2017Date of Patent: July 6, 2021Assignee: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Thomas Yong Lim Ang, Soo Chew Sie, Siwei Huang
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Publication number: 20210156648Abstract: A wearable programming unit (WPU) (1 10, 1 10a-1 10b) for assisting a user deploy air burst munition (ABM, 10) from a rifle (20) in an intuitive manner Is described. The WPU has a ballistic processor (112), wireless communication channels (120), a vibrator (130), a display (130), a mode button (150) and up/down select buttons (160, 161). After an ABM is selected and loaded into the rifle, and a deployment distance entered in the WPU, the ballistic processor calculates and outputs a time of burst T and barrel angle alpha. The barrel angle alpha is received by a sighting unit (104) and appears as a target marker. Once the rifle is tilted and/or moved so that a centre of the sighting unit coincides with the target marker, the WPU vibrates as a signal to the user to trigger the rifle.Type: ApplicationFiled: August 7, 2017Publication date: May 27, 2021Inventors: Cheng Hok AW, Thomas Yong Lim ANG, Soo Chew SIE, Siwei HUANG
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Publication number: 20200363165Abstract: The present invention describes an air-burst projectile (100) and a system (200) for deploying the airburst projectile to counter an unmanned aerial vehicle (UAV) 10. Each airburst projectile includes one or more spinners (140, 140a-140d); each spinner has a sleeve or a tube (146), a number of radial partition plates (148, 148a-148d) extending from the sleeve/tube and an annular rear plate (144) connected to the sleeve. Adjacent partition plates thus form a compartment (150). Disposed in each compartment is a streamer or streamers (170,170a,170b), which are formed in a coiled-up state. When the airburst projectile is deployed into a flight path of a target UAV, the spinners (140, 140a-140d) are ejected and the streamers (170,170a,170b) are dispersed in the flight path to create a streamer cloud, so that a streamer may entangle with propellers of the UAV and bring down the UAV, or as a warning or fence marking shot.Type: ApplicationFiled: January 31, 2019Publication date: November 19, 2020Inventors: Wen Jun, Edwin ANG, Yong Peng TAN, Juan Kiat QUEK, Ce Yu POO, Yuen Hoong, Benedict WOO, Cheng Hok AW
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Publication number: 20200363172Abstract: The present invention discloses a lightweight hybrid cartridge case (100) for a cartridged ammunition and a method of manufacture (200). The lightweight hybrid cartridge case (100) includes a cap (110) with a cylindrical sidewall (112) connected a base (120); a polymer shell (150) is insert-molded onto the sidewall of the cap; and an overmolded sleeve (180) is formed to cover the metal-polymer joint between the cap (110) and the polymer sleeve (150). The cylindrical sidewall (112) covered by the overmolded sleeve (180) has a plurality of stepped ridges (132, 132a), preferably with one stepped ridge (133) having a C-stepped edge (134).Type: ApplicationFiled: February 1, 2019Publication date: November 19, 2020Inventors: Chun Kang KOH, Juan Kiat QUEK, Su Shan NG, Wen Jun, Edwin ANG, Cheng Hok AW
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Publication number: 20200355478Abstract: This invention describes embodiments of door breaching grenades (100,100a,100b,100c,100d). Each grenade comprises a projectile (101,101a,101b,101c,101d) coupled to a propulsion cartridge (105); each projectile comprises a shell (110), a body member (140) and an ogive (180). A safe-and-arm mechanism (150) is located in the body member. A seat member (160) and a plunger (166) are assembled on a forward face of the body member so that a leading end of the plunger is in contact with an inside tip surface of the ogive, or a hollow guide member (184) is integrally formed with an inside tip surface of the ogive. In the armed state, upon impacting on a door/barricade (5), the plunger or hollow guide/sleeve impinges on a detonator pin (164), which then sets off a chain of explosive charges (152, 120, 122) whilst the projectile is still outside the door/barricade. The grenade is made substantially of polymer parts.Type: ApplicationFiled: January 31, 2019Publication date: November 12, 2020Inventors: Su Shan NG, Yuen Hoong, Benedict WOO, Juan Kiat QUEK, Cheng Hok AW
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Publication number: 20170045346Abstract: A projectile (100, 100a, 100b, 100c) containing two chemiluminescent dye components (123, 125), a dye powder (126) and one or more capsules (170) containing a pyrophoric substance. Upon impact at a target, a nose cap (110) of the projectile (100, 100a, 100b, 100c) and the capsule(s) (170) become broken, thereby allowing the pyrophoric substance to oxidize and emit an infra-red signal to mark the strike point. Oxidation of the pyrophoric substance is controlled, to allow the projectile to be fire-safe.Type: ApplicationFiled: April 15, 2015Publication date: February 16, 2017Inventors: Cheng Hok AW, Boon Siong CHONG, Renjie XIE, Miguel ORTEGA, Rachel Hendrika NEWELL
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Patent number: 9518809Abstract: The present invention describes an electronic fuze operable to complement a mechanical point impact fuze. The electronic fuze includes a voltage generator circuit, micro-controller, a piezo-electric sensor, a firing circuit and a safety lockout circuit. When a projectile strikes a target at an optimum angle, the mechanical point impact fuze is activated; when the strike angle is oblique, the mechanical point impact fuze may be ineffective but the piezo-electric sensor is operable to trigger the firing circuit. The safety lockout circuit ensures the firing circuit is operative only after a predetermined delay time when an n-channel FET is turned OFF. The micro-controller also generates a TIME-OUT signal, which provides for self-destruction of a projectile that has failed to explode.Type: GrantFiled: September 3, 2015Date of Patent: December 13, 2016Assignee: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Juan Kiat Jeremy Quek, Yong Lim Thomas Ang, Siwei Huang, Soo Chew Sie
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Publication number: 20150377599Abstract: The present invention describes an electronic fuze operable to complement a mechanical point impact fuze. The electronic fuze includes a voltage generator circuit, micro-controller, a piezo-electric sensor, a firing circuit and a safety lockout circuit. When a projectile strikes a target at an optimum angle, the mechanical point impact fuze is activated; when the strike angle is oblique, the mechanical point impact fuze may be ineffective but the piezo-electric sensor is operable to trigger the firing circuit. The safety lockout circuit ensures the firing circuit is operative only after a predetermined delay time when an n-channel FET is turned OFF. The micro-controller also generates a TIME-OUT signal, which provides for self-destruction of a projectile that has failed to explode.Type: ApplicationFiled: September 3, 2015Publication date: December 31, 2015Inventors: Cheng Hok AW, Juan Kiat Jeremy Quek, Yong Lim Thomas Ang, Siwei Huang, Soo Chew Sie
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Patent number: 9163916Abstract: The present invention describes an electronic fuze (200) operable to complement a mechanical point impact fuze (101). The electronic fuze (200) includes a voltage generator circuit (210), micro-controller (220), a piezo-electric sensor (262), a firing circuit (280) and a safety lockout circuit (290). When a projectile (50) strikes a target at an optimum angle, the mechanical point impact fuze (101) is activated; when the strike angle is oblique, the mechanical point impact fuze may be ineffective but the piezo-electric sensor (262) is operable to trigger the firing circuit (280). The safety lockout circuit (290) ensures the firing circuit (280) is operative only after a predetermined delay time when an n-channel FET (292) is turned OFF. The micro-controller (220) also generates a TIME-OUT signal, which provides for self-destruction of a projectile that has failed to explode.Type: GrantFiled: March 22, 2012Date of Patent: October 20, 2015Assignee: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Juan Kiat Jeremy Quek, Yong Lim Thomas Ang, Siwei Huang, Soo Chew Sie
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Patent number: 8881655Abstract: The present invention describes a projectile (100,100a,100b,100c,100d) containing two luminescent dye components (123,125) and a dye powder (126). The first luminescent dye component (123) is contained in an ampoule (122) while the second luminescent dye component is contained in a vial (124) disposed inside the ampoule (122). A front crusher (120,120a) is provided at a front of the ampoule to crush into the ampoule and vial, thereby allowing the dye components to react and give a luminous glow. Upon impact at a target, a nose cap (110) of the projectile (100,100a,100b,100c,100d) breaks and a rear crusher (130) behind the ampoule throws the ampoule (122) forward and sputters the luminous dye out of the nose cap (110); at the same time, the dye powder (126) surrounding the ampoule is sputtered out to mark the point of impact. In addition, a thermal glow is also provided to mark the point of impact. Projectiles also allow light tracing.Type: GrantFiled: September 10, 2011Date of Patent: November 11, 2014Assignee: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Boon Siong Chong, Kar Hin Cheang, Chun Kang Koh, Renjie Xie
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Patent number: 8869701Abstract: The present invention describes an improved cartridged projectile (100). The cartridged projectile (100) comprises a projectile (110) seating at a mouth of a cartridge case (130). The cartridge case (130) has a base (134) that houses a high pressure chamber (150). A side of the high pressure chamber (150) is capped by a pressure disc (170), which is secured onto the base of the cartridge case by a nozzle ring (160). The nozzle ring (160) has a tapered or conical surface that allows the pressure disc (170) to flex, and a surface (171) of the pressure disc (170) exterior of the high pressure chamber has intersecting V-shaped grooves (172). When propellant in the high pressure chamber (150) is burned efficiently, high pressure gases developing inside the high pressure chamber cause the pressure disc (170) to rupture at a predetermined pressure along the grooves (172) so that the gases propel the projectile (110) out of a barrel at a higher speed of about 100 m/s or more.Type: GrantFiled: September 26, 2011Date of Patent: October 28, 2014Assignee: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Chee Keong Yak, Soo Chew Sie, Renjie Xie
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Publication number: 20140041545Abstract: The present invention describes a projectile (100, 100a,100b,100c,100d) containing two luminescent dye components (123,125) and a dye powder (126). The first luminescent dye component (123) is contained in an ampoule (122) whilst the second luminescent dye component is contained in a vial (124) disposed inside the ampoule (122). A front crusher (120,120a) is provided at a front of the ampoule to crush into the ampoule and vial, thereby allowing the dye components to react and give a luminous glow. Upon impact at a target, a nose cap (110) of the projectile (100,100a,100b,100c,100d) breaks and a rear crusher (130) behind the ampoule throws the ampoule (122) forward and sputters the luminous dye out of the nose cap (110); at the same time, the dye powder (126) surrounding the ampoule is sputtered out to mark the point of impact. In addition, a thermal glow is also provided to mark the point of impact. Projectiles also allow light tracing.Type: ApplicationFiled: September 10, 2011Publication date: February 13, 2014Applicant: Advanced Material Engineering Pte Ltd.Inventors: Cheng Hok Aw, Boon Siong Chong, Kar Hin Cheang, Chun Kang Koh, Renjie Xie
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Publication number: 20130239836Abstract: The present invention describes an improved cartridged projectile (100). The cartridged projectile (100) comprises a projectile (110) seating at a mouth of a cartridge case (130). The cartridge case (130) has a base (134) that houses a high pressure chamber (150). A side of the high pressure chamber (150) is capped by a pressure disc (170), which is secured onto the base of the cartridge case by a nozzle ring (160). The nozzle ring (160) has a tapered or conical surface that allows the pressure disc (170) to flex, and a surface (171) of the pressure disc (170) exterior of the high pressure chamber has intersecting V-shaped grooves (172). When propellant in the high pressure chamber (150) is burned efficiently, high pressure gases developing inside the high pressure chamber cause the pressure disc (170) to rupture at a predetermined pressure along the grooves (172) so that the gases propel the projectile (110) out of a barrel at a higher speed of about 100 m/s or more.Type: ApplicationFiled: September 26, 2011Publication date: September 19, 2013Applicant: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Chee Keong Yak, Soo Chew Sie, Renjie Xie
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Patent number: 8393539Abstract: The present invention describes methods for programming trigger time of a projectile (60) based on remaining flight time to a target (P) after the projectile (60) is airborne. The actual muzzle (Vo) and flight speeds (V1, V2, etc.) are independently determined and compared to those used by the ballistic computer (30), and a better estimate of trigger time is accordingly used to activate detonation of the projectile (60). In one embodiment, a Kalman algorithm is used to provide a better estimate of the projectile's flight speeds obtained by independent methods to provide the better estimate of the trigger time.Type: GrantFiled: February 18, 2009Date of Patent: March 12, 2013Assignee: Advanced Material Engineering Pte Ltd.Inventors: Thomas Yong Lim Ang, Say Him Ng, Cheng Hok Aw
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Publication number: 20120291650Abstract: The present invention describes an electronic fuze (200) operable to complement a mechanical point impact fuze (101). The electronic fuze (200) includes a voltage generator circuit (210), micro-controller (220), a piezo-electric sensor (262), a firing circuit (280) and a safety lockout circuit (290). When a projectile (50) strikes a target at an optimum angle, the mechanical point impact fuze (101) is activated; when the strike angle is oblique, the mechanical point impact fuze may be ineffective but the piezo-electric sensor (262) is operable to trigger the firing circuit (280). The safety lockout circuit (290) ensures the firing circuit (280) is operative only after a predetermined delay time when an n-channel FET (292) is turned OFF. The micro-controller (220) also generates a TIME-OUT signal, which provides for self-destruction of a projectile that has failed to explode.Type: ApplicationFiled: March 22, 2012Publication date: November 22, 2012Applicant: Advanced Material Engineering Pte LtdInventors: Cheng Hok Aw, Juan Kiat Jeremy Quek, Yong Lim Thomas Ang, Siwei Huang, Soo Chew Sie
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Patent number: 8082845Abstract: The present invention provides a self destruction impact fuse for fail-proof detonating a projectile, preferably a low velocity projectile. The present invention further provides a projectile that can be detonated reliably even at low velocity.Type: GrantFiled: December 19, 2007Date of Patent: December 27, 2011Assignee: Advanced Meterial Engineering Pte LtdInventors: Cheng Hok Aw, Juan Kiat Quek, Soo Chew Sie
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Publication number: 20110048218Abstract: The present invention describes methods for programming trigger time of a projectile (60) based on remaining flight time to a target (P) after the projectile (60) is airborne. The actual muzzle (Vo) and flight speeds (V1, V2, etc.) are independently determined and compared to those used by the ballistic computer (30), and a better estimate of trigger time is accordingly used to activate detonation of the projectile (60). In one embodiment, a Kalman algorithm is used to provide a better estimate of the projectile's flight speeds obtained by independent methods to provide the better estimate of the trigger time.Type: ApplicationFiled: February 18, 2009Publication date: March 3, 2011Inventors: Thomas Yong Lim Ang, Say Him Ng, Cheng Hok Aw