公开(公告)号：US07809160B2

公开(公告)日：2010-10-05

申请号：US10987299

申请日：2004-11-15

Applicant: Roel Vertegaal ,  Changuk Sohn ,  Daniel Cheng ,  Victor Macfarlane ,  Jeffrey S. Shell

Inventor： Roel Vertegaal ,  Changuk Sohn ,  Daniel Cheng ,  Victor Macfarlane ,  Jeffrey S. Shell

IPC: G06K9/00

CPC classification number: A61B3/113 ,  G06F3/013 ,  G06K9/00335 ,  G06K9/00604 ,  G06K9/3216 ,  G06T7/254 ,  G06T2207/30041

Abstract: Apparatus and method for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries or the tracking of a cursor image on a screen by the subject through a known trajectory. One embodiment includes one uncalibrated camera for acquiring video images of the subject's eye(s) and optionally having an on-axis illuminator, and a surface, object, or visual scene with embedded off-axis illuminator markers. The off-axis markers are reflected on the corneal surface of the subject's eyes as glints. The glints indicate the distance between the point of gaze in the surface, object, or visual scene and the corresponding marker on the surface, object, or visual scene.

Abstract translation: 用于人或动物对象中的眼睛注视跟踪的装置和方法，其不经相机的校准，眼睛几何的特定测量或受试者通过已知轨迹在屏幕上跟踪光标图像。 一个实施例包括用于获取被摄体的眼睛的视频图像并且可选地具有轴上照明器的一个未校准的照相机以及具有嵌入的离轴照明器标记的表面，物体或视觉场景。 离轴标记物在受试者眼睛的角膜表面上反射为闪光。 闪光指示表面，物体或视觉场景中的凝视点与表面，物体或视觉场景上的相应标记之间的距离。

公开(公告)号：USD578599S1

公开(公告)日：2008-10-14

申请号：US29262940

申请日：2006-07-14

Applicant: Daniel Cheng

Designer： Daniel Cheng

公开(公告)号：US07267540B2

公开(公告)日：2007-09-11

申请号：US11339848

申请日：2006-01-26

Applicant: Michael A. Fridley ,  J. Wayne Martin ,  Tsung (Daniel) Cheng Chang

Inventor： Michael A. Fridley ,  J. Wayne Martin ,  Tsung (Daniel) Cheng Chang

IPC: B29B9/10

CPC classification number: B29B9/065 ,  B26D1/0006 ,  B26D1/29 ,  B26D7/2614 ,  B26D2001/0033

Abstract: A cutter hub and blade assembly for cutting polymer strands extruded from a die face in a pelletizer has cutter blades mounted on the cutter hub at a steep angle. The blades are beveled along a portion of their leading edge to form a blunt cutting edge or surface to the blades which is generally perpendicular to the die face. By beveling the leading edge of a blade supported at a steep angle to form a blunt cutting edge, the bottom surface area of the blade in contact with the die face can be significantly reduced. The reduced contact area provides several advantages including a clean cut of the pellets and a faster blade grinding when seating the blades to the die face.

Abstract translation: 用于切割在造粒机中从模具表面挤出的聚合物股线的切割轮毂和刀片组件具有以陡峭角度安装在切割轮毂上的切割刀片。 叶片沿其前缘的一部分倾斜以形成通常垂直于模具面的刀片的钝的切割边缘或表面。 通过将以陡峭角度支撑的叶片的前缘倾斜以形成钝的切割边缘，可以显着地减小与模具面接触的叶片的底面积。 减少的接触面积提供了几个优点，包括颗粒的清洁切割和将叶片安置在模具面上时的更快的叶片研磨。

公开(公告)号：US20070193103A1

公开(公告)日：2007-08-23

申请号：US11483733

申请日：2006-07-10

Applicant: Daniel Cheng

Inventor： Daniel Cheng

IPC: F41G1/00

CPC classification number: F41G11/003 ,  F41G1/35

Abstract: A gun accessory includes a main body having an upper surface having two sides, a first side wall and a second side wall extending upwardly from each of the two sides, first and second slide members provided on the first and second side walls, respectively, and a first locating hole provided adjacent the first side wall. The accessory also includes a first locating bar pivotably coupled to the first locating hole and having a first baffle and a first press plate, and a first elastic element provided between the first press plate and the main body to pivot the first press plate with respect to the main body, and in turn drive the first baffle to protrude above the upper surface of the main body.

Abstract translation: 枪附件包括具有两侧的上表面的主体，分别从每个侧面向上延伸的第一侧壁和第二侧壁，分别设置在第一侧壁和第二侧壁上的第一和第二滑动构件，以及 邻近第一侧壁设置的第一定位孔。 附件还包括可枢转地联接到第一定位孔并具有第一挡板和第一压板的第一定位杆，以及设置在第一压板和主体之间的第一弹性元件，以使第一压板相对于 主体，从而驱动第一挡板突出到主体的上表面之上。

公开(公告)号：US20050175218A1

公开(公告)日：2005-08-11

申请号：US10987299

申请日：2004-11-15

Applicant: Roel Vertegaal ,  Changuk Sohn ,  Daniel Cheng ,  Victor Macfarlane

Inventor： Roel Vertegaal ,  Changuk Sohn ,  Daniel Cheng ,  Victor Macfarlane

IPC: A61B3/113 ,  G06F3/00 ,  G06F3/01 ,  G06K9/00 ,  A61B3/14 ,  G09G5/08

CPC classification number: A61B3/113 ,  G06F3/013 ,  G06K9/00335 ,  G06K9/00604 ,  G06K9/3216 ,  G06T7/254 ,  G06T2207/30041

Abstract: A system and method for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries or the tracking of a cursor image on a screen by the subject through a known trajectory. The preferred embodiment includes one uncalibrated camera for acquiring video images of the subject's eye(s) and optionally having an on-axis illuminator, and a surface, object, or visual scene with embedded off-axis illuminator markers. The off-axis markers are reflected on the corneal surface of the subject's eyes as glints. The glints indicate the distance between the point of gaze in the surface, object, or visual scene and the corresponding marker on the surface, object, or visual scene. The marker that causes a glint to appear in the center of the subject's pupil is determined to be located on the line of regard of the subject's eye, and to intersect with the point of gaze. Point of gaze on the surface, object, or visual scene is calculated as follows. First, by determining which marker glints, as provided by the corneal reflections of the markers, are closest to the center of the pupil in either or both of the subject's eyes. This subset of glints forms a region of interest (ROI). Second, by determining the gaze vector (relative angular or cartesian distance to the pupil center) for each of the glints in the ROI. Third, by relating each glint in the ROI to the location or identification (ID) of a corresponding marker on the surface, object, or visual scene observed by the eyes. Fourth, by interpolating the known locations of each these markers on the surface, object, or visual scene, according to the relative angular distance of their corresponding glints to the pupil center.

Abstract translation: 一种用于人或动物对象中的眼睛注视跟踪的系统和方法，其不经相机的校准，眼睛几何形状的特定测量或受试者通过已知轨迹在屏幕上跟踪光标图像。 优选实施例包括一个未校准的相机，用于获取被摄体的眼睛的视频图像，并且可选地具有轴上照明器，以及具有嵌入的离轴照明器标记的表面，物体或视觉场景。 离轴标记物在受试者眼睛的角膜表面上反射为闪光。 闪光指示表面，物体或视觉场景中的凝视点与表面，物体或视觉场景上的相应标记之间的距离。 确定导致闪烁出现在受试者瞳孔中心的标记被确定为位于受试者眼睛的视线上，并与目标点相交。 表面，物体或视觉场景的注视点计算如下。 首先，通过确定由标记物的角膜反射提供的哪个标记物闪烁在受试者的眼睛中的任一者或两者中最接近瞳孔的中心。 闪光的这个子集形成感兴趣的区域（ROI）。 第二，通过确定ROI中每个闪烁的注视矢量（与瞳孔中心的相对角度或笛卡儿距离）。 第三，通过将ROI中的每个闪光关联到由眼睛观察到的表面，物体或视觉场景上的相应标记的位置或标识（ID）。 第四，通过根据其相应的闪光与瞳孔中心的相对角距离，将表面，物体或视觉场景上的每个这些标记的已知位置内插。

公开(公告)号：US11319229B2

公开(公告)日：2022-05-03

申请号：US16865466

申请日：2020-05-04

Applicant: Man Chung Daniel Cheng

Inventor： Man Chung Daniel Cheng

IPC: C02F3/20 ,  C02F1/74 ,  B01F23/231 ,  B01F25/312 ,  B01F101/00

Abstract: An aeration device pertaining to the technical field of sewage treatment includes a flow mixing chamber and an air inlet chamber. The flow mixing chamber has a liquid inlet opening, a liquid outlet opening, and an air inlet hole penetrating the chamber wall and located inside the air inlet chamber. The air inlet chamber has an air inlet opening and an interior space whose cross-sectional area is gradually reduced along the liquid flow direction in the flow mixing chamber. The cross-sectional area and number of the air inlet hole can be properly set in order for the mixed fluid produced by the aeration device to have relatively high-density small-diameter air bubbles that contribute to mixing the liquid flow and air flow sufficiently, dissolving oxygen rapidly and sufficiently into the liquid flow, increasing the oxygen dissolution rate of the mixed fluid, and enhancing aeration efficiency.

公开(公告)号：US20210238073A1

公开(公告)日：2021-08-05

申请号：US16865466

申请日：2020-05-04

Applicant: Man Chung Daniel Cheng

Inventor： Man Chung Daniel Cheng

IPC: C02F3/20 ,  C02F1/74 ,  B01F3/04 ,  B01F5/04

Abstract: An aeration device pertaining to the technical field of sewage treatment includes a flow mixing chamber and an air inlet chamber. The flow mixing chamber has a liquid inlet opening, a liquid outlet opening, and an air inlet hole penetrating the chamber wall and located inside the air inlet chamber. The air inlet chamber has an air inlet opening and an interior space whose cross-sectional area is gradually reduced along the liquid flow direction in the flow mixing chamber. The cross-sectional area and number of the air inlet hole can be properly set in order for the mixed fluid produced by the aeration device to have relatively high-density small-diameter air bubbles that contribute to mixing the liquid flow and air flow sufficiently, dissolving oxygen rapidly and sufficiently into the liquid flow, increasing the oxygen dissolution rate of the mixed fluid, and enhancing aeration efficiency.

公开(公告)号：US07963652B2

公开(公告)日：2011-06-21

申请号：US11255174

申请日：2005-10-21

Applicant: Roel Vertegaal ,  Changuk Sohn ,  Daniel Cheng ,  Victor MacFarlane ,  Jeffrey S. Shell

Inventor： Roel Vertegaal ,  Changuk Sohn ,  Daniel Cheng ,  Victor MacFarlane ,  Jeffrey S. Shell

IPC: A61B3/10 ,  A61B3/14

CPC classification number: G06K9/00604 ,  G06T7/251 ,  G06T7/73 ,  G06T2207/10016 ,  G06T2207/30201

Abstract: A method and apparatus for eye gaze tracking in human or animal subjects without calibration of cameras, specific measurements of eye geometries, or tracking of a cursor image on a screen by the subject through a known trajectory. One embodiment provides a method for tracking a user's eye gaze at a surface, object, or visual scene, comprising: providing an imaging device for acquiring images of at least one of the user's eves: modeling, measuring, estimating, and/or calibrating for the user's head position: providing one or more markers associated with the surface, object, or visual scene for producing corresponding glints or reflections in the user's eyes; analyzing the images to find said glints or reflections and/or the pupil: and determining eye gaze of the user upon a said one or more marker as indicative of the user's eye gaze at the surface, object, or visual scene.

Abstract translation: 一种用于人或动物对象中的眼睛注视跟踪的方法和装置，其不经相机的校准，眼睛几何的特定测量，或被受试者通过已知轨迹跟踪屏幕上的光标图像。 一个实施例提供了一种用于在表面，对象或视觉场景跟踪用户的眼睛注视的方法，包括：提供成像装置，用于获取至少一个用户的前景的图像：建模，测量，估计和/或校准 用户的头部位置：提供与表面，对象或视觉场景相关联的一个或多个标记，以在用户的​​眼睛中产生相应的闪光或反射; 分析图像以发现所述闪光或反射和/或瞳孔;以及在所述一个或多个标记上确定用户的眼睛凝视，以指示用户在表面，物体或视觉场景的视线。

公开(公告)号：US06908467B2

公开(公告)日：2005-06-21

申请号：US10437767

申请日：2003-05-14

Applicant: Wing Yuk Ip ,  Daniel Cheng Chi Hang

Inventor： Wing Yuk Ip ,  Daniel Cheng Chi Hang

IPC: A61B20060101 ,  A61B17/00 ,  A61B17/56 ,  A61B17/58 ,  A61B17/64 ,  A61B17/68

CPC classification number: A61B17/68 ,  A61B17/64 ,  A61B17/688 ,  A61B2017/00867

Abstract: A fixation device for internally or externally fixing fractures comprising at least one nitinol wire having an S-shaped section and two ends wherein each of said two ends forms a hook for hooking into a bone section of a fractured bone. This device can be made from nitinol which has a transformation temperature between 25° C. and 35° C. In addition, this device can have a diameter between 0.6 mm and 5 mm. The device can be inserted using the following process which starts by cooling the wire below a transfer temperature such that the nitinol wire forms in a martensite state. Next, the nitinol wire is inserted into a interphalangeal bone underneath a patients skin. Next, the nitinol wire to heats up inside a patients body above the transfer temperature. Finally, the wire transforms wire from a martensite state to an austenite state wherein when the nitinol wire elongates in a longitudinal direction to generate a distraction force.

Abstract translation: 一种用于内部或外部固定骨折的固定装置，其包括至少一个具有S形截面和两端的镍钛诺线，其中所述两个端部中的每一个形成用于钩入骨折骨的骨段中的钩。 该装置可以由具有25℃至35℃之间的转变温度的镍钛诺制成。此外，该装置的直径可以在0.6mm至5mm之间。 可以使用以下过程插入装置，其通过将导线冷却到转印温度以下，使得镍钛诺丝形成马氏体状态。 接下来，将镍钛诺丝插入患者皮肤下方的指间骨。 接下来，镍钛诺丝在患者体内加热高于转移温度。 最后，将丝从马氏体状态转变为奥氏体状态，其中当镍钛诺丝沿纵向延伸以产生牵引力时。

公开(公告)号：US08898915B2

公开(公告)日：2014-12-02

申请号：US13445038

申请日：2012-04-12

Applicant: Daniel Cheng

Inventor： Daniel Cheng

IPC: G01C15/00

CPC classification number: G01C15/004 ,  F41G1/35 ,  G01C15/002

Abstract: A twin-beam laser module has a housing having a first cylindrical space and a second cylindrical space, which are adjacent and parallel in axial direction to each other. A first laser assembly is directly secured inside the first cylindrical space to output a first laser beam, and an outer cylindrical casing is positioned inside the second cylindrical space. A second laser assembly is provided inside the outer cylindrical casing to output a second laser beam, and an adjustment apparatus adjusts the orientation of the outer cylindrical casing so as to align the first laser beam and the second laser beam to be parallel to each other.

Abstract translation: 双光束激光模块具有壳体，该壳体具有彼此相邻且平行的第一圆柱形空间和第二圆柱形空间。 第一激光组件直接固定在第一圆柱形空间内以输出第一激光束，并且外圆柱形壳体位于第二圆柱形空间的内部。 第二激光组件设置在外圆柱形壳体的内部以输出第二激光束，并且调节装置调节外圆柱形壳体的取向以使第一激光束和第二激光束彼此平行。