US20140378994A1 - Spherical linkage type surgical robotic arm - Google Patents
Spherical linkage type surgical robotic arm Download PDFInfo
- Publication number
- US20140378994A1 US20140378994A1 US13/923,670 US201313923670A US2014378994A1 US 20140378994 A1 US20140378994 A1 US 20140378994A1 US 201313923670 A US201313923670 A US 201313923670A US 2014378994 A1 US2014378994 A1 US 2014378994A1
- Authority
- US
- United States
- Prior art keywords
- axis center
- curved bar
- center
- bar
- spherical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Images
Classifications
-
- A61B19/2203—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25J—MANIPULATORS; CHAMBERS PROVIDED WITH MANIPULATION DEVICES
- B25J17/00—Joints
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B34/00—Computer-aided surgery; Manipulators or robots specially adapted for use in surgery
- A61B34/30—Surgical robots
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H21/00—Gearings comprising primarily only links or levers, with or without slides
- F16H21/46—Gearings comprising primarily only links or levers, with or without slides with movements in three dimensions
- F16H21/54—Gearings comprising primarily only links or levers, with or without slides with movements in three dimensions for conveying or interconverting oscillating or reciprocating motions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S901/00—Robots
- Y10S901/19—Drive system for arm
- Y10S901/21—Flaccid drive element
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S901/00—Robots
- Y10S901/27—Arm part
- Y10S901/28—Joint
Definitions
- the present invention relates to robots and more particularly, to a spherical linkage type surgical robotic arm.
- the surgeon when performing a laparoscopic surgery, the surgeon needs to insert an endoscopic imaging module and a surgical instrument module into the body of the patient and then to perform the surgery while simultaneously viewing the endoscopic image.
- the surgeon will need the assist of a mechanical arm to hold or operate the related surgical instruments so that the surgeon can proceed with the operation.
- US2012/0184968 discloses a robotic arm with five-bar spherical linkage, which uses a parallel spherical five-bar linkage.
- the surgical instrument is affixed to an extension portion of one link (see FIG. 15 ).
- This designs allows the surgical instrument to pass through the center of spherical rotation, however the other part beyond the center of spherical rotation will be turned with the respective link around the center of spherical rotation.
- the large turning angle of the surgical instrument will reduce the readability for the surgeon to read the data being displayed on the surface of the surgical instrument.
- the present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a spherical linkage type surgical robotic arm, which reduces calculation burden by uniformizing link length, achieving better robotic arm control and allocation than conventional robotic arm designs.
- a spherical linkage type surgical robotic arm turnable around a center of spherical rotation comprises a first curved bar, which comprises a first axis center and a second axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a second curved bar, which is equal to the first curved bar in length, comprising a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third axis center coincides with the first axis center; a third curved bar, which comprises a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third curved bar being pivotally connected to the second curved bar in such a manner that the fifth axis center coincides with the fourth axis center; and a fourth curved bar, which comprises a seventh
- the calculation conditions are simplified, and therefore the calculation burden can be reduced, achieving easier robotic arm control and allocation than conventional robotic arm designs.
- the invention also provides a spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising a first curved bar, which comprises a first axis center and a second axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a second curved bar, which comprises a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third axis center coincides with the first axis center; a third curved bar, which comprises a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third curved bar being pivotally connected to the second curved bar in such a manner that the fifth axis center coincides with the fourth axis center; a fourth curved bar, which comprises a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through the center
- the invention also provides a spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising: a first curved bar, which comprises a first axis center and a second axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a second curved bar, which comprises a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a third curved bar, which comprises a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third curved bar being pivotally connected to the second curved bar in such a manner that the fifth axis center coincides with the fourth axis center; a fourth curved bar, which comprises a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation,
- FIG. 1 is an elevational view of a spherical linkage type surgical robotic arm in accordance with a first embodiment of the present invention.
- FIG. 2 is an elevational view of the spherical linkage type surgical robotic arm in accordance with the first embodiment of the present invention when viewed from another angle.
- FIG. 3 is a side view of the spherical linkage type surgical robotic arm in accordance with the first embodiment of the present invention.
- FIG. 4 is an elevational view of a spherical linkage type surgical robotic arm in accordance with a second embodiment of the present invention.
- FIG. 5 is a side view of the spherical linkage type surgical robotic arm in accordance with the second embodiment of the present invention.
- FIG. 6 is a bottom view of the spherical linkage type surgical robotic arm in accordance with the second embodiment of the present invention.
- FIG. 7 is a schematic perspective view of a spherical linkage type surgical robotic arm in accordance with a third embodiment of the present invention.
- a spherical linkage type surgical robotic arm in accordance with a first embodiment of the present invention is shown turnable around a center of spherical rotation C.
- the spherical linkage type surgical robotic arm comprises a first curved bar 11 , a second curved bar 12 , a third curved bar 13 and a fourth curved bar 14 .
- axle center described in this specification is a virtual axis about which an object is turned.
- the first curved bar 11 has a first axis center 11 a and a second axis center 11 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the second curved bar 12 is of equal length relative to the first curved bar 11 , having a third axis center 12 a and a fourth axis center 12 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. Further, the third axis center 12 a coincides with the first axis center 11 a.
- the third curved bar 13 has a fifth axis center 13 a and a sixth axis center 13 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the third curved bar 13 is pivotally connected to the second curved bar 12 . Further, the fifth axis center 13 a coincides with the fourth axis center 12 b.
- the fourth curved bar 14 has a seventh axis center 14 a and an eighth axis center 14 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the fourth curved bar 14 is respectively pivotally connected to the third curved bar 13 and the first curved bar 11 .
- the seventh axis center 14 a coincides with the sixth axis center 13 b.
- the eighth axis center 14 b coincides with the second axis center 11 b.
- the third curved bar 13 and the fourth curved bar 14 can be made having the same length, simplifying the program operation in controlling the motion of every curved bar in the preferred embodiments of the present invention. More particularly, the second curved bar 12 and the third curved bar 13 can be made having the same length. In this embodiment, the first curved bar 11 , the second curved bar 12 , the third curved bar 13 and the fourth curved bar 14 have the same length, further reducing the calculation burden and shortening the calculation time.
- the spherical linkage type surgical robotic arm further comprises a first driving mechanism 15 and a second driving mechanism 16 .
- the first driving mechanism 15 is a combination of a motor and a speed reducer for driving an object to rotate, comprising a first driving shaft 151 connected to the first curved bar 11 and coincided with the first axis center 11 a .
- the second driving mechanism 16 comprises a second driving shaft 161 connected to the second curved bar 12 and coincided with the third axis center 12 a.
- first driving shaft 151 and the second driving shaft 161 are respectively and directly connected to the first curved bar 11 and the second curved bar 12 , the number of component parts can be relatively reduced, thereby reducing the manufacturing cost and shortening the assembling time, and therefore the invention is cost-effective. Further, through the first driving mechanism 15 and the second driving mechanism 16 to control relative motion between the first curved bar 11 and the second curved bar 12 , the motion of the spherical linkage type surgical robotic arm is thus controlled.
- the curved bar length indicated herein means the shortest distance between the two centers of axis of each curved bar at the common sphere based on the center of spherical rotation C.
- FIGS. 4 and 5 a spherical linkage type surgical robotic arm in accordance with a second embodiment of the present invention is shown.
- This second embodiment is substantially similar to the aforesaid first embodiment with the exception that this second embodiment further comprises an instrument bar 17 , a first proportional wheel 18 , a second proportional wheel 19 , and a flexible element 21 .
- the instrument bar 17 comprises an operational axis center 17 a passed through the center of spherical rotation C.
- the instrument bar 17 is pivotally connected to the third curved bar 13 or fourth curved bar 14 . Further, the operational axis center 17 a coincides with the sixth axis center 13 b or seventh axis center 14 a.
- the first proportional wheel 18 is fixedly connected to the first curved bar 11 and rotatable with the first curved bar 11 to let the second axis center 11 b pass through the wheel axle center of the first proportional wheel 18 .
- the diameter of the second proportional wheel 19 is larger than the diameter of the first proportional wheel 18 . Further, the second proportional wheel 19 is fixedly connected to the instrument bar 17 and rotatable with the instrument bar 17 to let the operational axis center 17 a pass through the wheel axle center of the second proportional wheel 19 .
- the flexible element 21 is wound round the first proportional wheel 18 and the second proportional wheel 19 .
- the flexible element 21 is a steel wire rope.
- this is not a limitation. It can also be a rope or belt.
- installation of the first proportional wheel 18 , the second proportional wheel 19 and the flexible element 21 achieves the effect of enabling the turning angle of the instrument bar 17 to be smaller than the turning angle of the fourth curved bar 14 without the condition of having the first curved bar 11 and the second curved bar 12 to be made equal in length.
- the first curved bar 11 and the second curved bar 12 have the same length, it achieves the effect of shortening the calculation time.
- the second curved bar 12 and the third curved bar 13 can also be made equal in length, enhancing the effects.
- the contained angle between the instrument bar 17 and the third curved bar 13 and the contained angle between the instrument bar 17 and the fourth curved bar 14 can be kept equal.
- a spherical linkage type surgical robotic arm in accordance with a third embodiment of the present invention is shown turnable about a center of spherical rotation.
- the spherical linkage type surgical robotic arm comprises: a first curved bar 31 , a second curved bar 32 , a third curved bar 33 , a fourth curved bar 34 , a ground bar 35 , an instrument bar 36 , a first proportional wheel 37 , a second proportional wheel 38 and a flexible element 39 .
- the first curved bar 31 has a first axis center 31 a and a second axis center 31 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the second curved bar 32 has a third axis center 32 a and a fourth axis center 32 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the third curved bar 33 has a fifth axis center 33 a and a sixth axis center 33 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the third curved bar 33 is pivotally connected to the second curved bar 32 . Further, the fifth axis center 33 a coincides with the fourth axis center 32 b.
- the fourth curved bar 34 has a seventh axis center 34 a and an eighth axis center 34 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C.
- the fourth curved bar 34 is respectively pivotally connected to the third curved bar 33 and the first curved bar 31 .
- the seventh axis center 34 a coincides with the sixth axis center 33 b.
- the eighth axis center 34 b coincides with the second axis center 31 b.
- the ground bar 35 has a ninth axis center 35 a and a tenth axis center 35 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. Further, said ninth axis center 35 a being coincided with said first axis center 31 a, and the tenth axis center 35 b coincides with the third axis center 32 b.
- the instrument bar 36 comprises an operational axis center 36 a passed through the center of spherical rotation C.
- the instrument bar 36 is pivotally connected to the third curved bar 33 or fourth curved bar 34 . Further, the operational axis center 36 a coincides with the sixth axis center 33 b or seventh axis center 34 a.
- the first proportional wheel 37 is fixedly connected to the first curved bar 31 and rotatable with the first curved bar 31 to let the second axis center 31 b pass through the wheel axle center of the first proportional wheel 37 .
- the diameter of the second proportional wheel 38 is larger than the diameter of the first proportional wheel 37 . Further, the second proportional wheel 38 is fixedly connected to the instrument bar 36 and rotatable with the instrument bar 36 to let the operational axis center 36 a pass through the wheel axle center of the second proportional wheel 38 .
- the flexible element 39 is wound round the first proportional wheel 37 and the second proportional wheel 38 .
- the flexible element 39 is a steel wire rope.
- this is not a limitation. It can also be a rope or belt.
- the third curved bar 33 and the fourth curved bar 34 can also be made having the same length to simplify the calculation in controlling the motion of each curved bar. More particularly, the second curved bar 32 and the third curved bar 33 can be made having the same length.
- the first curved bar 31 , the second curved bar 32 , the third curved bar 33 and the fourth curved bar 34 have the same length, further reducing the calculation burden and shortening the calculation time.
- the first proportional wheel 37 and the second proportional wheel 38 there is a turn proportional relationship between the instrument bar 36 and the first curved bar 37 , and therefore the turning angle of the surgical instrument mounted at the instrument bar 36 can be reduced, bringing to the surgeon better readability of the data displayed on the surface of the surgical instrument when compared to conventional mechanical arm designs.
Abstract
In order to reduce the calculation in robotic arm allocation, the invention provides a spherical linkage type surgical robotic arm, which includes a first curved bar having a first axis center and a second axis center, a second curved bar being equal to the first curved bar in length and having a third axis center and a fourth axis center, the third axis center in coincidence with the first axis center, a third curved bar having a fifth axis center and a sixth axis center and being pivoted to the second curved bar, and a fourth curved bar having a seventh axis center and an eighth axis center and being pivoted to the third curved bar and the first curved bar, thereby reducing the calculation burden and facilitating control and allocation.
Description
- 1. Field of the Invention
- The present invention relates to robots and more particularly, to a spherical linkage type surgical robotic arm.
- 2. Description of the Related Art
- With the advances in medical technology, new surgical techniques have been continuously introduced. Fast and low risk surgical techniques that enable patients to recover faster have been the goal of the medical profession, and the very popular minimally invasive surgery in recent years is one of them. For example, endoscopic imaging technology and micro-surgical instruments are used in laparoscopic surgery, so that the surgery can be performed without making a large wound on the body of the patient, not only reducing blood loss in the patient but also enabling the body of the patient to recover quickly from the wound.
- However, when performing a laparoscopic surgery, the surgeon needs to insert an endoscopic imaging module and a surgical instrument module into the body of the patient and then to perform the surgery while simultaneously viewing the endoscopic image. Thus, the surgeon will need the assist of a mechanical arm to hold or operate the related surgical instruments so that the surgeon can proceed with the operation.
- Conventional robotic arms commonly have a complicated structure and require complicated calculations and precise control to achieve precise allocation. US 2007/0173976 A1 discloses a center robotic arm with five-bar spherical linkage for endoscopic camera. According to this design, each link has a different length (see
FIG. 7A andFIG. 7B ), therefore, it requires a large amount of calculations to precisely move the outward axis to the desired location. - Further, US2012/0184968 discloses a robotic arm with five-bar spherical linkage, which uses a parallel spherical five-bar linkage. According to this design, the surgical instrument is affixed to an extension portion of one link (see
FIG. 15 ). This designs allows the surgical instrument to pass through the center of spherical rotation, however the other part beyond the center of spherical rotation will be turned with the respective link around the center of spherical rotation. During movement of the link, the large turning angle of the surgical instrument will reduce the readability for the surgeon to read the data being displayed on the surface of the surgical instrument. - The present invention has been accomplished under the circumstances in view. It is the main object of the present invention to provide a spherical linkage type surgical robotic arm, which reduces calculation burden by uniformizing link length, achieving better robotic arm control and allocation than conventional robotic arm designs.
- It is another object of the present invention to provide a spherical linkage type surgical robotic arm, which has an added instrument bar that provides a turn proportional relationship relative to the links so that the turning angle of the surgical instrument mounted at the instrument bar can be reduced, bringing to the surgeon better readability of the data being displayed on surface of the surgical instrument than conventional mechanical arm designs.
- To achieve these and other objects of the present invention, a spherical linkage type surgical robotic arm turnable around a center of spherical rotation in accordance with the present invention comprises a first curved bar, which comprises a first axis center and a second axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a second curved bar, which is equal to the first curved bar in length, comprising a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third axis center coincides with the first axis center; a third curved bar, which comprises a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third curved bar being pivotally connected to the second curved bar in such a manner that the fifth axis center coincides with the fourth axis center; and a fourth curved bar, which comprises a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the fourth curved bar being respectively pivotally connected to the third curved bar and the first curved bar in such a manner that the seventh axis center coincides with the sixth axis center and the eighth axis center coincides with the second axis center.
- Subject to the design that the first curved bar and the second curved bar have the same length, the calculation conditions are simplified, and therefore the calculation burden can be reduced, achieving easier robotic arm control and allocation than conventional robotic arm designs.
- Further, the invention also provides a spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising a first curved bar, which comprises a first axis center and a second axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a second curved bar, which comprises a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third axis center coincides with the first axis center; a third curved bar, which comprises a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third curved bar being pivotally connected to the second curved bar in such a manner that the fifth axis center coincides with the fourth axis center; a fourth curved bar, which comprises a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the fourth curved bar being respectively pivotally connected to the third curved bar and the first curved bar in such a manner that the seventh axis center coincides with the sixth axis center and the eighth axis center coincides with the second axis center; an instrument bar, which comprises an operational axis center passed through the center of spherical rotation, the instrument bar being pivotally connected to the third curved bar or the fourth curved bar such that the operational axis center coincides with the sixth axis center or the seventh axis center; a first proportional wheel fixedly mounted at the first curved bar to let the second axis center pass through the wheel axle center of the first proportional wheel; a second proportional wheel having a diameter larger than the diameter of the first proportional wheel, the second proportional wheel being fixedly mounted at the instrument bar to let the operational axis center pass through the wheel axle center of the second proportional wheel; and a flexible element wound round the first proportional wheel and the second proportional wheel.
- Subject to the arrangement of the instrument bar for the mounting of a surgical instrument and the arrangement of the first proportional wheel and the second proportional wheel, there is a turn proportional relationship between the instrument bar and the other curved bars so that the turning angle of the surgical instrument at the instrument bar can be reduced, bringing to the surgeon better readability of the data being displayed on the surface of the surgical instrument than conventional mechanical arm designs.
- Based on the same spirit of the invention, the invention also provides a spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising: a first curved bar, which comprises a first axis center and a second axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a second curved bar, which comprises a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation; a third curved bar, which comprises a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the third curved bar being pivotally connected to the second curved bar in such a manner that the fifth axis center coincides with the fourth axis center; a fourth curved bar, which comprises a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the fourth curved bar being respectively pivotally connected to the third curved bar and the first curved bar in such a manner that the seventh axis center coincides with the sixth axis center and the eighth axis center coincides with the second axis center; a ground bar, which comprises a ninth axis center and a tenth axis center respectively located at two opposite ends thereof and passed through the center of spherical rotation, the ninth axis center coincides with the first axis center and the tenth axis center coincides with the third axis center; an instrument bar, which comprises an operational axis center passed through the center of spherical rotation, the instrument bar being pivotally connected to the third curved bar or the fourth curved bar such that the operational axis center coincides with the sixth axis center or the seventh axis center; a first proportional wheel fixedly mounted at the first curved bar to let the second axis center pass through the wheel axle center of the first proportional wheel; a second proportional wheel having a diameter larger than the diameter of the first proportional wheel, the second proportional wheel being fixedly mounted at the instrument bar to let the operational axis center pass through the wheel axle center of the second proportional wheel; and a flexible element wound round the first proportional wheel and the second proportional wheel.
- Subject to the arrangement of the instrument bar for the mounting of a surgical instrument and the arrangement of the first proportional wheel and the second proportional wheel, there is a turn proportional relationship between the instrument bar and the other curved bars so that the turning angle of the surgical instrument at the instrument bar can be reduced, bringing to the surgeon better readability of the data being displayed on the surface of the surgical instrument than conventional mechanical arm designs.
- Other advantages and features of the present invention will be fully understood by reference to the following specification in conjunction with the accompanying drawings, in which like reference signs denote like components of structure.
-
FIG. 1 is an elevational view of a spherical linkage type surgical robotic arm in accordance with a first embodiment of the present invention. -
FIG. 2 is an elevational view of the spherical linkage type surgical robotic arm in accordance with the first embodiment of the present invention when viewed from another angle. -
FIG. 3 is a side view of the spherical linkage type surgical robotic arm in accordance with the first embodiment of the present invention. -
FIG. 4 is an elevational view of a spherical linkage type surgical robotic arm in accordance with a second embodiment of the present invention. -
FIG. 5 is a side view of the spherical linkage type surgical robotic arm in accordance with the second embodiment of the present invention. -
FIG. 6 is a bottom view of the spherical linkage type surgical robotic arm in accordance with the second embodiment of the present invention. -
FIG. 7 is a schematic perspective view of a spherical linkage type surgical robotic arm in accordance with a third embodiment of the present invention. - Referring to
FIGS. 1-3 , a spherical linkage type surgical robotic arm in accordance with a first embodiment of the present invention is shown turnable around a center of spherical rotation C. The spherical linkage type surgical robotic arm comprises a firstcurved bar 11, a secondcurved bar 12, a thirdcurved bar 13 and a fourthcurved bar 14. - It is to be noted that the axle center described in this specification is a virtual axis about which an object is turned.
- The first
curved bar 11 has afirst axis center 11 a and asecond axis center 11 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. - The second
curved bar 12 is of equal length relative to the firstcurved bar 11, having athird axis center 12 a and afourth axis center 12 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. Further, thethird axis center 12 a coincides with thefirst axis center 11 a. - The third
curved bar 13 has afifth axis center 13 a and asixth axis center 13 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. The thirdcurved bar 13 is pivotally connected to the secondcurved bar 12. Further, thefifth axis center 13 a coincides with thefourth axis center 12 b. - The fourth
curved bar 14 has aseventh axis center 14 a and aneighth axis center 14 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. The fourthcurved bar 14 is respectively pivotally connected to the thirdcurved bar 13 and the firstcurved bar 11. Theseventh axis center 14 a coincides with thesixth axis center 13 b. Theeighth axis center 14 b coincides with thesecond axis center 11 b. - In addition to the condition that the first
curved bar 11 and the secondcurved bar 12 have the same length, the thirdcurved bar 13 and the fourthcurved bar 14 can be made having the same length, simplifying the program operation in controlling the motion of every curved bar in the preferred embodiments of the present invention. More particularly, the secondcurved bar 12 and the thirdcurved bar 13 can be made having the same length. In this embodiment, the firstcurved bar 11, the secondcurved bar 12, the thirdcurved bar 13 and the fourthcurved bar 14 have the same length, further reducing the calculation burden and shortening the calculation time. - In this embodiment, the spherical linkage type surgical robotic arm further comprises a
first driving mechanism 15 and asecond driving mechanism 16. Thefirst driving mechanism 15 is a combination of a motor and a speed reducer for driving an object to rotate, comprising afirst driving shaft 151 connected to the firstcurved bar 11 and coincided with thefirst axis center 11 a. Thesecond driving mechanism 16 comprises asecond driving shaft 161 connected to the secondcurved bar 12 and coincided with thethird axis center 12 a. Because thefirst driving shaft 151 and thesecond driving shaft 161 are respectively and directly connected to the firstcurved bar 11 and the secondcurved bar 12, the number of component parts can be relatively reduced, thereby reducing the manufacturing cost and shortening the assembling time, and therefore the invention is cost-effective. Further, through thefirst driving mechanism 15 and thesecond driving mechanism 16 to control relative motion between the firstcurved bar 11 and the secondcurved bar 12, the motion of the spherical linkage type surgical robotic arm is thus controlled. - It is to be noted that the curved bar length indicated herein means the shortest distance between the two centers of axis of each curved bar at the common sphere based on the center of spherical rotation C.
- Referring to
FIGS. 4 and 5 , a spherical linkage type surgical robotic arm in accordance with a second embodiment of the present invention is shown. This second embodiment is substantially similar to the aforesaid first embodiment with the exception that this second embodiment further comprises aninstrument bar 17, a firstproportional wheel 18, a secondproportional wheel 19, and aflexible element 21. - The
instrument bar 17 comprises anoperational axis center 17 a passed through the center of spherical rotation C. Theinstrument bar 17 is pivotally connected to the thirdcurved bar 13 or fourthcurved bar 14. Further, theoperational axis center 17 a coincides with thesixth axis center 13 b orseventh axis center 14 a. - The first
proportional wheel 18 is fixedly connected to the firstcurved bar 11 and rotatable with the firstcurved bar 11 to let thesecond axis center 11 b pass through the wheel axle center of the firstproportional wheel 18. - The diameter of the second
proportional wheel 19 is larger than the diameter of the firstproportional wheel 18. Further, the secondproportional wheel 19 is fixedly connected to theinstrument bar 17 and rotatable with theinstrument bar 17 to let theoperational axis center 17 a pass through the wheel axle center of the secondproportional wheel 19. - The
flexible element 21 is wound round the firstproportional wheel 18 and the secondproportional wheel 19. In this embodiment, theflexible element 21 is a steel wire rope. However, this is not a limitation. It can also be a rope or belt. - In this embodiment, installation of the first
proportional wheel 18, the secondproportional wheel 19 and theflexible element 21 achieves the effect of enabling the turning angle of theinstrument bar 17 to be smaller than the turning angle of the fourthcurved bar 14 without the condition of having the firstcurved bar 11 and the secondcurved bar 12 to be made equal in length. However, if the firstcurved bar 11 and the secondcurved bar 12 have the same length, it achieves the effect of shortening the calculation time. Further, the secondcurved bar 12 and the thirdcurved bar 13 can also be made equal in length, enhancing the effects. - If the diameter of the second
proportional wheel 19 is twice the diameter of the firstproportional wheel 18 under the condition that the firstcurved bar 11, the secondcurved bar 12, the thirdcurved bar 13 and the fourthcurved bar 14 have the same length, the contained angle between theinstrument bar 17 and the thirdcurved bar 13 and the contained angle between theinstrument bar 17 and the fourthcurved bar 14 can be kept equal. - During the operation of the second embodiment of the present invention, due to the installation of the first
proportional wheel 18 and the secondproportional wheel 19, there is a turn proportional relationship between theinstrument bar 17 and the firstcurved bar 11, and therefore the turning angle of the surgical instrument mounted at theinstrument bar 17 can be reduced, bringing to the surgeon better readability of the data being displayed on the surface of the surgical instrument than conventional mechanical arm designs. - Referring to
FIG. 7 , a spherical linkage type surgical robotic arm in accordance with a third embodiment of the present invention is shown turnable about a center of spherical rotation. The spherical linkage type surgical robotic arm comprises: a firstcurved bar 31, a secondcurved bar 32, a thirdcurved bar 33, a fourthcurved bar 34, aground bar 35, aninstrument bar 36, a firstproportional wheel 37, a secondproportional wheel 38 and aflexible element 39. - The first
curved bar 31 has afirst axis center 31 a and asecond axis center 31 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. - The second
curved bar 32 has athird axis center 32 a and afourth axis center 32 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. - The third
curved bar 33 has afifth axis center 33 a and asixth axis center 33 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. The thirdcurved bar 33 is pivotally connected to the secondcurved bar 32. Further, thefifth axis center 33 a coincides with thefourth axis center 32 b. - The fourth
curved bar 34 has aseventh axis center 34 a and aneighth axis center 34 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. The fourthcurved bar 34 is respectively pivotally connected to the thirdcurved bar 33 and the firstcurved bar 31. Theseventh axis center 34 a coincides with thesixth axis center 33 b. Theeighth axis center 34 b coincides with thesecond axis center 31 b. - The
ground bar 35 has aninth axis center 35 a and atenth axis center 35 b respectively located at two opposite ends thereof and passed through the center of spherical rotation C. Further, saidninth axis center 35 a being coincided with saidfirst axis center 31 a, and thetenth axis center 35 b coincides with thethird axis center 32 b. - The
instrument bar 36 comprises anoperational axis center 36 a passed through the center of spherical rotation C. Theinstrument bar 36 is pivotally connected to the thirdcurved bar 33 or fourthcurved bar 34. Further, theoperational axis center 36 a coincides with thesixth axis center 33 b orseventh axis center 34 a. - The first
proportional wheel 37 is fixedly connected to the firstcurved bar 31 and rotatable with the firstcurved bar 31 to let thesecond axis center 31 b pass through the wheel axle center of the firstproportional wheel 37. - The diameter of the second
proportional wheel 38 is larger than the diameter of the firstproportional wheel 37. Further, the secondproportional wheel 38 is fixedly connected to theinstrument bar 36 and rotatable with theinstrument bar 36 to let theoperational axis center 36 a pass through the wheel axle center of the secondproportional wheel 38. - The
flexible element 39 is wound round the firstproportional wheel 37 and the secondproportional wheel 38. In this embodiment, theflexible element 39 is a steel wire rope. However, this is not a limitation. It can also be a rope or belt. - In this embodiment, in addition to the condition that the first
curved bar 31 and the secondcurved bar 32 have the same length, the thirdcurved bar 33 and the fourthcurved bar 34 can also be made having the same length to simplify the calculation in controlling the motion of each curved bar. More particularly, the secondcurved bar 32 and the thirdcurved bar 33 can be made having the same length. For example, in this embodiment, the firstcurved bar 31, the secondcurved bar 32, the thirdcurved bar 33 and the fourthcurved bar 34 have the same length, further reducing the calculation burden and shortening the calculation time. Further, due to the installation of the firstproportional wheel 37 and the secondproportional wheel 38, there is a turn proportional relationship between theinstrument bar 36 and the firstcurved bar 37, and therefore the turning angle of the surgical instrument mounted at theinstrument bar 36 can be reduced, bringing to the surgeon better readability of the data displayed on the surface of the surgical instrument when compared to conventional mechanical arm designs. - Although particular embodiments of the invention have been described in detail for purposes of illustration, various modifications and enhancements may be made without departing from the spirit and scope of the invention. Accordingly, the invention is not to be limited except as by the appended claims.
Claims (14)
1. A spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising:
a first curved bar comprising a first axis center and a second axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation;
a second curved bar being equal to said first curved bar in length, said second curved bar comprising a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said third axis center being coincided with said first axis center;
a third curved bar comprising a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said third curved bar being pivotally connected to said second curved bar, said fifth axis center being coincided with said fourth axis center; and
a fourth curved bar comprising a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said fourth curved bar being respectively pivotally connected to said third curved bar and said first curved bar, said seventh axis center being coincided with said sixth axis center, said eighth axis center being coincided with said second axis center.
2. The spherical linkage type surgical robotic arm as claimed in claim 1 , wherein said third curved bar and said fourth curved bar are equal in length.
3. The spherical linkage type surgical robotic arm as claimed in claim 2 , wherein said second curved bar and said third curved bar are equal in length.
4. The spherical linkage type surgical robotic arm as claimed in claim 1 , further comprising a first driving mechanism, said first driving mechanism comprising a first driving shaft, said first driving shaft being connected to said first curved bar and coincided with said first axis center, and a second driving mechanism, said second driving mechanism comprising a second driving shaft, said second driving shaft being connected to said second curved bar and coincided with said third axis center.
5. A spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising:
a first curved bar comprising a first axis center and a second axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation;
a second curved bar comprising a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said third axis center being coincided with said first axis center;
a third curved bar comprising a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said third curved bar being pivotally connected to said second curved bar, said fifth axis center being coincided with said fourth axis center;
a fourth curved bar comprising a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said fourth curved bar being respectively pivotally connected to said third curved bar and said first curved bar, said seventh axis center being coincided with said sixth axis center, said eighth axis center being coincided with said second axis center;
an instrument bar comprising an operational axis center passed through said center of spherical rotation, said instrument bar being pivotally connected to one of said third curved bar and said fourth curved bar, said operational axis center being coincided with one of said sixth axis center and said seventh axis center;
a first proportional wheel fixedly mounted at said first curved bar to let said second axis center pass through said wheel axle center of said first proportional wheel;
a second proportional wheel having a diameter larger than the diameter of said first proportional wheel, said second proportional wheel being fixedly mounted at said instrument bar to let said operational axis center pass through said wheel axle center of said second proportional wheel; and
a flexible element wound round said first proportional wheel and said second proportional wheel.
6. The spherical linkage type surgical robotic arm as claimed in claim 5 , wherein said first curved bar and said second curved bar are equal in length.
7. The spherical linkage type surgical robotic arm as claimed in claim 6 , wherein said third curved bar and said fourth curved bar are equal in length.
8. The spherical linkage type surgical robotic arm as claimed in claim 7 , wherein said second curved bar and said third curved bar are equal in length.
9. The spherical linkage type surgical robotic arm as claimed in claim 8 , wherein the diameter of said second curved bar is twice the diameter of said first curved bar.
10. The spherical linkage type surgical robotic arm as claimed in claim 5 , further comprising a first driving mechanism, said first driving mechanism comprising a first driving shaft connected to said first curved bar and coincided with said first axis center, and a second driving mechanism, said second driving mechanism comprising a second driving shaft connected to said second curved bar and coincided with said third axis center.
11. A spherical linkage type surgical robotic arm turnable around a center of spherical rotation, comprising:
a first curved bar comprising a first axis center and a second axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation;
a second curved bar comprising a third axis center and a fourth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation;
a third curved bar comprising a fifth axis center and a sixth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said third curved bar being pivotally connected to said second curved bar, said fifth axis center being coincided with said fourth axis center;
a fourth curved bar comprising a seventh axis center and an eighth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said fourth curved bar being respectively pivotally connected to said third curved bar and said first curved bar, said seventh axis center being coincided with said sixth axis center, said eighth axis center being coincided with said second axis center;
a ground bar comprising a ninth axis center and a tenth axis center respectively located at two opposite ends thereof and passed through said center of spherical rotation, said ninth axis center being coincided with said first axis center, said tenth axis center being coincided with said third axis center;
an instrument bar comprising an operational axis center passed through said center of spherical rotation, said instrument bar being pivotally connected to one of said third curved bar and said fourth curved bar, said operational axis center being coincided with one of said sixth axis center and said seventh axis center;
a first proportional wheel fixedly mounted at said first curved bar to let said second axis center pass through said wheel axle center of said first proportional wheel;
a second proportional wheel having a diameter larger than the diameter of said first proportional wheel, said second proportional wheel being fixedly mounted at said instrument bar to let said operational axis center pass through said wheel axle center of said second proportional wheel; and
a flexible element wound round said first proportional wheel and said second proportional wheel.
12. The spherical linkage type surgical robotic arm as claimed in claim 11 , wherein said first curved bar and said second curved bar are equal in length.
13. The spherical linkage type surgical robotic arm as claimed in claim 12 , wherein said third curved bar and said fourth curved bar are equal in length.
14. The spherical linkage type surgical robotic arm as claimed in claim 13 , wherein said second curved bar and said third curved bar are equal in length.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/923,670 US20140378994A1 (en) | 2013-06-21 | 2013-06-21 | Spherical linkage type surgical robotic arm |
US15/367,812 US10265866B2 (en) | 2013-06-21 | 2016-12-02 | Spherical linkage type surgical robotic arm |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/923,670 US20140378994A1 (en) | 2013-06-21 | 2013-06-21 | Spherical linkage type surgical robotic arm |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/367,812 Division US10265866B2 (en) | 2013-06-21 | 2016-12-02 | Spherical linkage type surgical robotic arm |
Publications (1)
Publication Number | Publication Date |
---|---|
US20140378994A1 true US20140378994A1 (en) | 2014-12-25 |
Family
ID=52111504
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US13/923,670 Abandoned US20140378994A1 (en) | 2013-06-21 | 2013-06-21 | Spherical linkage type surgical robotic arm |
US15/367,812 Active 2034-06-10 US10265866B2 (en) | 2013-06-21 | 2016-12-02 | Spherical linkage type surgical robotic arm |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US15/367,812 Active 2034-06-10 US10265866B2 (en) | 2013-06-21 | 2016-12-02 | Spherical linkage type surgical robotic arm |
Country Status (1)
Country | Link |
---|---|
US (2) | US20140378994A1 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150202780A1 (en) * | 2014-01-22 | 2015-07-23 | Hiwin Technologies Corp. | Robotic arm with spherical linkage |
CN108544481A (en) * | 2018-05-17 | 2018-09-18 | 深圳市领略数控设备有限公司 | A kind of SCARA industrial robots |
CN111880501A (en) * | 2020-07-29 | 2020-11-03 | 珠海格力电器股份有限公司 | Interaction method for establishing equipment linkage scene, storage medium and electronic equipment |
WO2021258217A1 (en) * | 2020-06-25 | 2021-12-30 | Rogue Research Inc. | Articulated positioning system for a scientific or medical tool, robotized positioning assembly comprising same and corresponding method |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN107569286A (en) * | 2017-10-24 | 2018-01-12 | 广西南宁栩兮科技有限公司 | A kind of high-precision medical manipulator |
CN114029930B (en) * | 2021-11-09 | 2023-06-23 | 绍兴文理学院 | 6 whole movable structure of pole bent lever stretch-draw |
DE102021131533B4 (en) | 2021-12-01 | 2023-06-15 | Technische Universität Ilmenau, Körperschaft des öffentlichen Rechts | Spherical crank gear |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6355048B1 (en) * | 1999-10-25 | 2002-03-12 | Geodigm Corporation | Spherical linkage apparatus |
US20050119638A1 (en) * | 1993-05-14 | 2005-06-02 | Sri International, Inc. | Remote center positioner |
US20120184968A1 (en) * | 2006-01-25 | 2012-07-19 | Intuitive Surgical Operations, Inc. | Robotic arm with five-bar spherical linkage |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5046375A (en) * | 1988-04-21 | 1991-09-10 | Massachusetts Institute Of Technology | Compact cable transmission with cable differential |
US20030020906A1 (en) * | 1999-10-25 | 2003-01-30 | Perry Y. Li | Scanning apparatus |
US9261172B2 (en) * | 2004-09-30 | 2016-02-16 | Intuitive Surgical Operations, Inc. | Multi-ply strap drive trains for surgical robotic arms |
US20060243085A1 (en) * | 2005-04-25 | 2006-11-02 | Blake Hannaford | Spherical motion mechanism |
US8167873B2 (en) | 2006-01-25 | 2012-05-01 | Intuitive Surgical Operations, Inc. | Center robotic arm with five-bar spherical linkage for endoscopic camera |
US8469945B2 (en) * | 2006-01-25 | 2013-06-25 | Intuitive Surgical Operations, Inc. | Center robotic arm with five-bar spherical linkage for endoscopic camera |
WO2007147232A1 (en) * | 2006-06-19 | 2007-12-27 | Robarts Research Institute | Apparatus for guiding a medical tool |
-
2013
- 2013-06-21 US US13/923,670 patent/US20140378994A1/en not_active Abandoned
-
2016
- 2016-12-02 US US15/367,812 patent/US10265866B2/en active Active
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20050119638A1 (en) * | 1993-05-14 | 2005-06-02 | Sri International, Inc. | Remote center positioner |
US6355048B1 (en) * | 1999-10-25 | 2002-03-12 | Geodigm Corporation | Spherical linkage apparatus |
US20120184968A1 (en) * | 2006-01-25 | 2012-07-19 | Intuitive Surgical Operations, Inc. | Robotic arm with five-bar spherical linkage |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150202780A1 (en) * | 2014-01-22 | 2015-07-23 | Hiwin Technologies Corp. | Robotic arm with spherical linkage |
US9440362B2 (en) * | 2014-01-22 | 2016-09-13 | Hiwin Technologies Corp. | Robotic arm with spherical linkage |
CN108544481A (en) * | 2018-05-17 | 2018-09-18 | 深圳市领略数控设备有限公司 | A kind of SCARA industrial robots |
WO2021258217A1 (en) * | 2020-06-25 | 2021-12-30 | Rogue Research Inc. | Articulated positioning system for a scientific or medical tool, robotized positioning assembly comprising same and corresponding method |
CN111880501A (en) * | 2020-07-29 | 2020-11-03 | 珠海格力电器股份有限公司 | Interaction method for establishing equipment linkage scene, storage medium and electronic equipment |
Also Published As
Publication number | Publication date |
---|---|
US20170120456A1 (en) | 2017-05-04 |
US10265866B2 (en) | 2019-04-23 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US10265866B2 (en) | Spherical linkage type surgical robotic arm | |
US9889568B2 (en) | Compact robotic wrist | |
US11148302B2 (en) | Remote-center-of-motion mechanism | |
ES2881537T3 (en) | General endoscopic control system | |
WO2017006373A1 (en) | Joint for robot arm, and surgical instrument | |
US20120065628A1 (en) | Medical apparatus | |
CN111936027A (en) | Arm device | |
CN104519823A (en) | Controller definition of a robotic remote center of motion | |
RU2710476C1 (en) | Transmission mechanism and surgical instrument | |
CN106333715B (en) | Laparoscopic surgical system | |
US10413164B2 (en) | Manipulator and manipulator system | |
US10390687B2 (en) | Endoscopic surgical instruments | |
US20150032117A1 (en) | Tube insertion device having end effector capable of changing direction | |
CN108567489B (en) | Operation arm, slave operation device and surgical robot | |
Yamashita et al. | Two-DOFs bending forceps manipulator of 3.5-mm diameter for intrauterine fetus surgery: feasibility evaluation | |
TWI504492B (en) | Spherical Linkage Surgical Arm | |
CN109480922A (en) | A kind of remote center movement parallel institution of four-degree-of-freedom for Minimally Invasive Surgery | |
CN113208736A (en) | Instrument driving device, instrument tail end assembly, surgical instrument and surgical robot | |
CN108567488B (en) | Operating arm | |
US20190175001A1 (en) | Endoscope | |
CN109984777A (en) | A kind of driving structure and the device with flexible joint | |
CN113475997A (en) | Reciprocating rotary driving system, device and medium of wireless capsule endoscope | |
US20180318024A1 (en) | Medical instrument | |
CN108852515B (en) | Slave operation device for single incision surgery and surgical robot | |
TWI468154B (en) | Holding device for medical apparatus |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HIWIN TECHNOLOGIES CORP., TAIWAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:WANG, REN-JENG;REEL/FRAME:030662/0191 Effective date: 20130605 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |