Patents by Inventor Zenan Zhang

Zenan Zhang 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).

  • Publication number: 20240376736
    Abstract: The automatic pool cleaning device performs wireless communication and uses a battery. The movable operating apparatus includes: at least one buoyance operating end, an electric control lock, and a locking member. The locking member limits the buoyance operating end when the electric control lock is in a locked state, and removes the limitation when the electric control lock is in an unlocked state. A lock control circuit which unlocks the electric control lock in response to a trigger signal generated when the automatic pool cleaning device stops working, such that the buoyance operating end floats and carries the traction rope out of the accommodation chamber to a water surface. The buoyance operating end is configured to move the automatic pool cleaning device out of a swimming pool in response to a user's operation. The wireless automatic pool cleaning device can be taken out of the pool conveniently and quickly.
    Type: Application
    Filed: February 21, 2024
    Publication date: November 14, 2024
    Applicant: WARM REFRIGERATION EQUIPMENT (SHANGHAI) CO., LTD QIDONG BRANCH
    Inventors: Zenan ZHANG, Kailong CHEN
  • Publication number: 20240325092
    Abstract: A method is provided for method for navigating a robotic endoscopic apparatus comprising: (a) providing a three-dimensional (3D) fiducial marker to a surgical field; (b) acquiring fluoroscopic image using a fluoroscopic imager wherein the fluoroscopic image contains the 3D fiducial marker, a body part and a portion of the robotic endoscopic apparatus placed inside of the body part; and (c) estimating a pose of the fluoroscopic imager based on the fluoroscopic image.
    Type: Application
    Filed: June 10, 2024
    Publication date: October 3, 2024
    Inventors: Tao Zhao, Changjiang Yang, Jason Joseph Hsu, Zenan Zhang, Frank Grillo, Zhongming Shen
  • Publication number: 20240277419
    Abstract: Disclosed herein are a surgical system for patella tracking and a method for selecting a properly-sized patellar implant utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected or a resected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a patellar implant may utilize the first and second trackers and the patellar tracking system.
    Type: Application
    Filed: February 29, 2024
    Publication date: August 22, 2024
    Inventors: Daniel Antonio Perez, Daniel Rudolf Scholl, Gokce Yildirim, Alvin Perez, Alex McLachlan, Zenan Zhang, Geoffrey Westrich
  • Patent number: 11944393
    Abstract: Disclosed herein are a surgical system for patella tracking and a method for selecting a properly-sized patellar implant utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected or a resected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a patellar implant may utilize the first and second trackers and the patellar tracking system.
    Type: Grant
    Filed: October 27, 2022
    Date of Patent: April 2, 2024
    Assignee: Mako Surgical Corp.
    Inventors: Daniel Antonio Perez, Daniel Rudolf Scholl, Gokce Yildirim, Alvin Perez, Alex McLachlan, Zenan Zhang, Geoffrey Westrich
  • Publication number: 20240041350
    Abstract: A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.
    Type: Application
    Filed: October 18, 2023
    Publication date: February 8, 2024
    Applicant: MAKO SURGICAL CORP.
    Inventors: Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Zhu Wu
  • Publication number: 20230380988
    Abstract: A registration system including a bone pin guide and a bone pin clamp. The bone pin guide may include a guide body, a first guide including a first guide through-hole having a first longitudinal axis, and a second guide including a second guide through-hole having a second longitudinal axis. The bone pin guide may guide first and second bone pins into a bone via the first and second guides. The bone pin clamp may include a clamp body, first, second, and third clamp through-holes extending through the clamp body, a plurality of registration indents defined on the clamp body, and a clamping mechanism including at least one adjustable fastener. The bone pin clamp may receive the first and second bone pins in the first and third clamp through-holes and guide a third bone pin into the bone via the second clamp through-hole.
    Type: Application
    Filed: July 13, 2023
    Publication date: November 30, 2023
    Applicant: MAKO SURGICAL CORP.
    Inventors: Zhu Wu, Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Ahmet Bagci
  • Patent number: 11813052
    Abstract: A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.
    Type: Grant
    Filed: January 11, 2022
    Date of Patent: November 14, 2023
    Assignee: MAKO SURGICAL CORP.
    Inventors: Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Zhu Wu
  • Patent number: 11737894
    Abstract: A registration system including a bone pin guide and a bone pin clamp. The bone pin guide may include a guide body, a first guide including a first guide through-hole having a first longitudinal axis, and a second guide including a second guide through-hole having a second longitudinal axis. The bone pin guide may guide first and second bone pins into a bone via the first and second guides. The bone pin clamp may include a clamp body, first, second, and third clamp through-holes extending through the clamp body, a plurality of registration indents defined on the clamp body, and a clamping mechanism including at least one adjustable fastener. The bone pin clamp may receive the first and second bone pins in the first and third clamp through-holes and guide a third bone pin into the bone via the second clamp through-hole.
    Type: Grant
    Filed: March 2, 2021
    Date of Patent: August 29, 2023
    Assignee: MAKO SURGICAL CORP.
    Inventors: Zhu Wu, Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Ahmet Bagci
  • Publication number: 20230086467
    Abstract: Systems and methods for assisting users with accurate tool identification. A tool includes a tool feature, and a navigation system includes a localizer to detect a position of the tool feature. A memory stores identification data associated with a plurality of tools. Controller(s) is/are coupled to the navigation system, the memory and the display. The controller(s) receive, from the localizer, the detected position of the tool feature and compare the detected position of the tool feature with the identification data stored in the memory to determine an identity of the tool. The controller(s) present, on a display, the identity of the tool and an identity of at least one other tool.
    Type: Application
    Filed: November 29, 2022
    Publication date: March 23, 2023
    Applicant: MAKO Surgical Corp.
    Inventors: Zenan Zhang, Kevin Bechtold, Carl Gayle
  • Publication number: 20230039959
    Abstract: Disclosed herein are a surgical system for patella tracking and a method for selecting a properly-sized patellar implant utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected or a resected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a patellar implant may utilize the first and second trackers and the patellar tracking system.
    Type: Application
    Filed: October 27, 2022
    Publication date: February 9, 2023
    Inventors: Daniel Antonio Perez, Daniel Rudolf Scholl, Gokce Yildirim, Alvin Perez, Alex McLachlan, Zenan Zhang, Geoffrey Westrich
  • Patent number: 11534242
    Abstract: A surgical system for assisting a user in performing a surgical procedure at a surgical site, comprising a tool having a checkpoint, a pointer having a tip, and a localizer to determine a position of the pointer within a field of view. A memory comprises identification data associated with a plurality of tools. A controller is configured to prompt the user to position the tip of at the checkpoint, to receive position data from the localizer associated with the pointer within the field of view, to compare position data associated with the pointer against the identification data of the memory to determine an identity of the tool, and to present the user with the identity of the tool.
    Type: Grant
    Filed: February 19, 2019
    Date of Patent: December 27, 2022
    Assignee: MAKO Surgical Corp.
    Inventors: Zenan Zhang, Kevin Bechtold, Carl Gayle
  • Patent number: 11510737
    Abstract: Disclosed herein are a surgical system for patella tracking and a method for selecting a properly-sized patellar implant utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected or a resected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a patellar implant may utilize the first and second trackers and the patellar tracking system.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: November 29, 2022
    Assignee: Mako Surgical Corp.
    Inventors: Daniel Antonio Perez, Daniel Rudolf Scholl, Gokee Yildirim, Alvin Perez, Alex McLachlan, Zenan Zhang, Geoffrey Westrich
  • Publication number: 20220125334
    Abstract: A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.
    Type: Application
    Filed: January 11, 2022
    Publication date: April 28, 2022
    Applicant: MAKO Surgical Corp.
    Inventors: Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Zhu Wu
  • Patent number: 11246508
    Abstract: A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.
    Type: Grant
    Filed: October 15, 2019
    Date of Patent: February 15, 2022
    Assignee: MAKO Surgical Corp.
    Inventors: Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matt Thompson, Eric Branch, Varun Chandra, Zhu Wu
  • Publication number: 20210177621
    Abstract: A registration system including a bone pin guide and a bone pin clamp. The bone pin guide may include a guide body, a first guide including a first guide through-hole having a first longitudinal axis, and a second guide including a second guide through-hole having a second longitudinal axis. The bone pin guide may guide first and second bone pins into a bone via the first and second guides. The bone pin clamp may include a clamp body, first, second, and third clamp through-holes extending through the clamp body, a plurality of registration indents defined on the clamp body, and a clamping mechanism including at least one adjustable fastener. The bone pin clamp may receive the first and second bone pins in the first and third clamp through-holes and guide a third bone pin into the bone via the second clamp through-hole.
    Type: Application
    Filed: March 2, 2021
    Publication date: June 17, 2021
    Applicant: MAKO Surgical Corp.
    Inventors: Zhu Wu, Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Ahmet Bagci
  • Patent number: 10959857
    Abstract: A registration system including a bone pin guide and a bone pin clamp. The bone pin guide may include a guide body, a first guide including a first guide through-hole having a first longitudinal axis, and a second guide including a second guide through-hole having a second longitudinal axis. The bone pin guide may guide first and second bone pins into a bone via the first and second guides. The bone pin clamp may include a clamp body, first, second, and third clamp through-holes extending through the clamp body, a plurality of registration indents defined on the clamp body, and a clamping mechanism including at least one adjustable fastener. The bone pin clamp may receive the first and second bone pins in the first and third clamp through-holes and guide a third bone pin into the bone via the second clamp through-hole.
    Type: Grant
    Filed: February 26, 2019
    Date of Patent: March 30, 2021
    Assignee: MAKO Surgical Corp.
    Inventors: Zhu Wu, Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matthew Thompson, Eric Branch, Varun Chandra, Ahmet Bagci
  • Publication number: 20200383803
    Abstract: A registration system including a bone pin guide and a bone pin clamp. The bone pin guide may include a guide body, a first guide including a first guide through-hole having a first longitudinal axis, and a second guide including a second guide through-hole having a second longitudinal axis. The bone pin guide may guide first and second bone pins into a bone via the first and second guides. The bone pin clamp may include a clamp body, first, second, and third clamp through-holes extending through the clamp body, a plurality of registration indents defined on the clamp body, and a clamping mechanism including at least one adjustable fastener. The bone pin clamp may receive the first and second bone pins in the first and third clamp through-holes and guide a third bone pin into the bone via the second clamp through-hole.
    Type: Application
    Filed: February 26, 2019
    Publication date: December 10, 2020
    Applicant: MAKO Surgical Corp.
    Inventors: Zhu Wu, Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matt Thompson, Eric Branch, Varun Chandra, Ahmet Bagci
  • Publication number: 20200054247
    Abstract: A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.
    Type: Application
    Filed: October 15, 2019
    Publication date: February 20, 2020
    Applicant: MAKO Surgical Corp.
    Inventors: Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matt Thompson, Eric Branch, Varun Chandra, Zhu Wu
  • Publication number: 20190388159
    Abstract: Disclosed herein are a surgical system for patella tracking and a method for selecting a properly-sized patellar implant utilizing the same. The surgical system may include first and second trackers and a patellar tracking system. The first tracker may be configured to contact an unresected or a resected patella, and the second tracker may be configured to contact a bone. The patellar tracking system may be configured to track the first and second trackers during patellar flexion and extension to generate patellar range of motion and patellar trial range of motion. A method for selecting a patellar implant may utilize the first and second trackers and the patellar tracking system.
    Type: Application
    Filed: June 20, 2019
    Publication date: December 26, 2019
    Inventors: Daniel Antonio Perez, Daniel Rudolf Scholl, Gokce Yildirim, Alvin Perez, Alex McLachlan, Zenan Zhang, Geoffrey Westrich
  • Patent number: 10485450
    Abstract: A system for intra-operatively registering a pelvis comprising an acetabulum with a computer model of the pelvis in a coordinate system. The system may include: a) a surgical navigation system including a tracking device; and b) at least one computing device in communication with the surgical navigation system. The at least one computing device: i) receiving first data points from first intra-operatively collected points on an articular surface of the acetabulum, the first data points collected with the tracking device; ii) receiving a second data point from a second intra-operatively collected point on the pelvis, the second data point collected with the tracking device, the second data point corresponding in location to a second virtual data point on the computer model; and iii) determining an intra-operative center of rotation of the femur relative to the pelvis from the first data points.
    Type: Grant
    Filed: August 30, 2017
    Date of Patent: November 26, 2019
    Assignee: MAKO Surgical Corp.
    Inventors: Sunil Gupta, Ta-Cheng Chang, Zenan Zhang, Kevin Bechtold, Matt Thompson, Eric Branch, Varun Chandra, Zhu Wu