FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENT RULES, 2003
COMPLETE SPECIFICATION
(See Section 10 and Rule 13)
A BENDING SECTION ASSEMBLY FOR AN ENDOSCOPIC DEVICE
Applicant:
BIORAD MEDISYS PRIVATE LIMITED
AN INDIAN COMPANY HAVING OFFICE ADDRESS AT
Survey No. 48, 3 & 48 7, Pashan - Sus Rd, Sus, Pune,
Maharashtra 411021
THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE SUBJECT MATTER AND THE MANNER IN WHICH IT IS TO BE PERFORMED.
1

TECHNICAL FIELD
[001] The present invention relates generally to the field of medical
devices. More specifically, the present invention relates to an endoscopic
device particularly a design and assembly of bending portion provided in
5 an insertion portion of an endoscope and configured to be operated to be
bent in a plurality of directions.
BACKGROUND
[002] In recent years, endoscopes and similar specialized instruments such as bronchoscopes, arthroscopes, colonoscopes, laparoscopes, gastroscopes
10 and duodenoscopes are well known from the state of the art and are used
in the medical field for visual examination and diagnosis of hollow organs and body cavities, as well as to assist in surgery, e.g. for a targeted tissue sampling. A conventional endoscope is generally an instrument with a distal end comprising an optical or electronic imaging system and a
15 bending portion, a proximal end with controls for manipulating the tool
and devices for viewing the image, and a solid or tubular elongate shaft connecting the ends. Both reusable and disposable endoscopes are known from the state of the art. [003] To use an endoscope, a physician inserts the distal end into a patient
20 through a natural orifice or an artificial incision and then pushes the shaft
into the patient until the distal end reaches a site of interest. The proximal end remains outside the patient and typically connects to an eyepiece, video monitor, or other equipment. A bending portion is provided on the distal end side of the insertion portion so that the insertion into the deep part of
25 the body can be easily performed. In the bending portion, circular
cylindrical bending parts are coaxially coupled to each other so as to be configured to be swung relative to each other. In general, the bending
2

portion is configured to be bent by connecting the tongue portions to each
other by a rivet. A prior art discloses a pair of tongue portions protrude
from both the end surfaces of a circularly cylindrical portion of the bending
part, respectively, and the pair of tongue portions is symmetrical about the
5 central axis. The tongue portions of both the bending parts adjacent to each
other are overlapped with each other and riveted so as to be configured to be swung relative to each other.
[004] Another prior art discloses a bending portion including a node ring group in which a plurality of node rings is stacked in series along the axial
10 direction. The node ring group accommodates the first raised portion of the
first node ring in the recessed portion of the second node ring, abuts the tip portion of the first raised portion against the flat portion of the recessed portion, and inserts the wire of the node ring Each node ring is formed by assembling each other by a pulling wire inserted through the portion. The
15 method disclosed by the prior arts is troublesome, in particular, in a thin
endoscope. Another disadvantage of prior art bending section is that bending section breaks while bending when tensile force and pressure increases. [005] To overcome the above problems, there is a need for a bending
20 portion which is easy to assemble and provides enough strength when
tensile force and pressure is increased. This invention is therefore directed towards providing an improved bending portion and its assembly, which is relatively simple in design and structure, and is highly effective for its intended purpose.
25 OBJECTIVES
[006] The objective of the present invention is to increase the strength of the bending section while maintaining the overall size of the bending section with double hinged geometry. A lower thickness of bending section can be manufactured with increased stability.
3

[007] Another object of the present invention is to provide structurally simple, easy to manufacture bending section that has a smaller bending radius and a larger bending angle.
5 SUMMARY
[008] Embodiments of the present disclosure present technological improvements as solutions to one or more of the above-mentioned technical problems.
[009] Before the present subject matter relating to a bending section
10 assembly for an endoscopic device, it is to be understood that this
application is not limited to the particular system described, as there can be
multiple possible embodiments which are not expressly illustrated in the
present disclosure. It is also to be understood that the terminology used in
the description is for the purpose of describing the implementations or
15 versions or embodiments only and is not intended to limit the scope of the
present subject matter.
[0010] This summary is provided to introduce aspects related to the
bending section assembly for an endoscopic device. This summary is not
intended to identify essential features of the claimed subject matter nor is it
20 intended for use in determining or limiting the scope of the present subject
matter.
[0011] In an embodiment of a present invention, a bending section assembly
for an endoscopic device is disclosed. The bending section assembly
comprises a plurality of rings. Each of the rings comprises a protruding
25 portion at a first end and a receiving portion at a second end. The
protruding portion comprises an inverted C-shaped structure and the receiving portion comprises an inverted C-shaped recess. A first end section
4

comprises a first end and a second end. The second end comprises a first
receiving portion. The first receiving portion comprises a pair of
protrusions. The pair of protrusions is curvilinear. The pair of protrusions
comprises an inverted C-shaped recess. A last end section comprises a first
5 end and a second end. The first end comprises a last protruding portion.
The last protruding portion comprises an inverted C-shaped protrusion and
a second end comprises a curved recess at centre. During assembly, the first
receiving portion is engaged with the protruding portion. The receiving
portion is engaged with the last protruding portion thereby forming the
10 bending section assembly for an endoscopic device.
[0012] This summary is provided to introduce aspects related to a bending section assembly for an endoscopic device. This summary is not intended to identify essential features of the claimed subject matter nor is it intended for use in determining or limiting the scope of the present subject matter.
15 [0013] Additional aspects, advantages, features and objects of the present
disclosure would be made apparent from the drawings and the detailed description of the illustrative embodiment.
[0014] It will be appreciated that features of the present disclosure are
susceptible to being combined in various combinations without departing
20 from the scope of the present disclosure as defined by the below mentioned
detailed description and drawings.
BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS
[0015] The foregoing detailed description of embodiments is better
understood when read in conjunction with the appended drawings. For the
25 purpose of illustrating the disclosure, there is shown in the present
document example constructions of the disclosure; however, the disclosure
5

is not limited to the specific system or method disclosed in the document and the drawings.
[0016] The present disclosure is described in detail with reference to the
accompanying figures. In the figures, the left-most digit(s) of a reference
5 number identifies the figure in which the reference number first appears.
The same numbers are used throughout the drawings to refer various features of the present subject matter.
[0017] Figure 1 illustrates a perspective view of a ureteroscope device, in accordance with an embodiment of the present subject matter.
10 [0018] Figure 2 illustrates nodes of a bending tube, in accordance with an
embodiment of the present subject matter.
[0019] Figure 3 illustrates the bending section in an assembled state, in accordance with an embodiment of the present subject matter.
[0020] In the above accompanying drawings, a non-underlined number
15 relates to an item identified by a line linking the non-underlined number to
the item. When a number is non-underlined and accompanied by an associated arrow, the non-underlined number is used to identify a general item at which the arrow is pointing.
[0021] Further, the figures depict various embodiments of the present
20 subject matter for purposes of illustration only. One skilled in the art will
readily recognize from the following discussion that alternative embodiments of the structures and methods illustrated herein may be employed without departing from the principles of the present subject matter described herein.
25 DETAILED DESCRIPTION
6

[0022] Some embodiments of this disclosure, illustrating all its features, will
now be discussed in detail. The words "comprising," "having," "containing,"
and "including," and other forms thereof, are intended to be equivalent in
meaning and be open ended in that an item or items following any one of
5 these words is not meant to be an exhaustive listing of such item or items,
or meant to be limited to only the listed item or items. It must also be noted
that as used herein and in the appended claims, the singular forms "a," "an,"
and "the" include plural references unless the context clearly dictates
otherwise. Although a bending section assembly for an endoscopic device,
10 similar or equivalent to those described herein can be used in the practice
or testing of embodiments of the present disclosure, the exemplary, a bending section assembly for an endoscopic device is now described.
[0023] For purposes of the present specification and claims, various
relational terms like “top” “bottom,” “proximal,” “distal,” “upper,”
15 “lower,” “front,” and “rear” are used to describe the present invention
when said invention is positioned in or viewed from a given orientation. It is to be understood that, by altering the orientation of the invention, certain relational terms may need to be adjusted accordingly.
[0024] The person skilled in the art will recognize many variations,
20 alternatives, and modifications of the embodiment of the present disclosure.
It should be understood that this invention is not limited to the particular
methodology, protocols, and the like, described herein and as such may
vary. The terminology used herein is for the purpose of describing
particular embodiment only and is not intended to limit the scope of the
25 present invention, which is defined solely by the claims.
[0025] Various modifications to the embodiment will be readily apparent to those skilled in the art and the generic principles herein may be applied to
7

other embodiments. For example, although the present disclosure will be
described in the context of a bending section assembly for an endoscopic
device, one of ordinary skill in the art will readily recognize that a system
can be utilized in any situation, when bending section is required in a
5 surgery without breaking in case of increased pressure on the bending
section assembly. Thus, the present disclosure is not intended to be limited to the embodiments illustrated but is to be accorded the widest scope consistent with the principles and features described herein.
[0026] In an embodiment, a bending section assembly for an endoscopic
10 device is disclosed. In an aspect of the present disclosure, an improved
single hand operated two piece ureteroscope is disclosed which comprises of a bending section that is easy to assemble and does not break when tensile force and pressure increases. According to present invention the bending section is easy to assemble and disassemble in a more efficient and
15 quick manner.
[0027] In an embodiment of a present invention, a bending section assembly for an endoscopic device is disclosed. The bending section assembly comprises a plurality of rings. Each of the rings comprises a protruding portion at a first end and a receiving portion at a second end. The
20 protruding portion comprises an inverted C-shaped structure and the
receiving portion comprises an inverted C-shaped recess. Each of the ring comprising a protruding portion and a receiving portion forms a single node ring. By engaging two single node rings a two node ring is formed. The bending section assembly comprises a plurality of bending pieces. Each
25 of the bending pieces comprises a two node rings. The plurality of bending
pieces (also referred to as node rings) are alternately connected to form a bending tube. The receiving portion is manufactured such that the protruding portion of a next ring is engaged with the receiving portion of
8

the previous ring. The protruding portion is engaged in the receiving
portion through a notches provided in the protruding portion and receiving
portion. The inverted C-shaped protrusion comprises a curved notch at
interior portion and the inverted C- shaped recess comprises curved notch
5 at exterior portion. The notches of protrusion and notches of recess are
made in such a way that the notches of protrusion and the notches of recess get interlocked with each other. The notches are made with protruded material. [0028] A first end section comprises a first end and a second end. The
10 second end comprises a first receiving portion. The first receiving portion
comprises a pair of protrusions. The pair of protrusions is curvilinear. The pair of protrusions comprises an inverted C-shaped recess. The pair of protrusions in the first end section is manufactured in such a way that the protruding portion of a next ring is engaged in the receiving portion of the
15 first end section.
[0029] A last end section comprises a first end and a second end. The first end comprises a last protruding portion. The last protruding portion comprises an inverted C-shaped protrusion and a second end comprises a curved recess at centre.
20 [0030] During assembly, the first receiving portion is engaged with the
protruding portion. The receiving portion is engaged with the last protruding portion, thereby forming the bending section assembly for an endoscopic device. [0031] In an embodiment, assembly of plurality of rings comprising steps
25 of engaging the receiving portion of the first end section with the
protruding portion of the second ring, engaging the receiving portion of the second ring with the protruding portion of a subsequent ring till the last end section depending on the length of the bending section.
9

[0032] The bending section assembly comprises a rectangular groove on a
top portion and a bottom portion of each of the rings. The rectangular
groove comprises a pair of rectangular cavities on both sides of the
rectangle. The rectangular grooves are provided to facilitate the flexibility
5 to the bending section.
[0033] Bending Section/tube which is joined with the Insertion Tube helps
the Surgeon to see at desired angle. The bending mechanism is driven by a
pair of wires. The wire is controlled by manually operated Lever. The
Notches and holes are partially circular and made with protruded material.
10 This protruded section provides support to guided notches for not to come
out from the holes when tensile force is applied by the wires. Bending Section does not break while bending when tensile force and pressure increases.
[0034] It should be noted that the above advantages and other advantages
15 will be better evident in the subsequent description. Further, in the
subsequent section the present subject is better explained with reference to the figures.
[0035] Referring now to the drawings, particularly by their reference numbers, Figure 1 illustrates a ureteroscope device 100 in an attached
20 configuration comprising a reusable portion particularly a handle 102 and
a disposable portion 104. The disposable portion 104 has a distal end 106 and a proximal end 108, wherein the disposable portion 104 is adapted to be inserted into a cavity in the body. A cannula 110 made up of polyamide braided with metal wires is disposed from the distal end 106 wherein the
25 cannula can be flexible and may include one or more lumens (not shown)
along with a bending portion 122 which can be articulated and deflected in any direction along or about longitudinal axis A-A’. A handle 102 of the
10

endoscope device 100 comprising of a distal end 112 and proximal end 114
is configured to control the movement of cannula 110 in one or more
directions relative to longitudinal axis A-A’. The handle 102 is made up of
high performance thermoplastics like polysulfone and ergonomically
5 designed to easily operate using one hand by the user. The user can move
the bending portion in one or more directions with the help of a lever 116. In order to detach the handle 102 from the disposable portion 104, an unlock button 118 is provided. Further a working channel 120 is provided on the disposable portion 104.
10 [0036] Fig. 1 is merely an example. A person skilled in the art will recognize
many variations, alternatives, and modifications of the embodiment of the present disclosure. The material used in manufacturing of the ureteroscope can be different than the family of high performance thermoplastics like polysulfone and the like as used in the present invention. The material for
15 cannula can be of different material other than polyamide. In another
embodiment the endoscope can be one piece instead of 2 piece split type.
[0037] Now referring to Figure 2, the bending piece is illustrated. The bending section assembly 122 comprises a plurality of rings 218. Each of the rings 218 comprises a protruding portion 208 at a first end and a receiving
20 portion 212 at a second end. The protruding portion 208 comprises an
inverted C-shaped structure and the receiving portion 212 comprises an inverted C-shaped recess. Each of the ring 218 comprising a protruding portion 208 and a receiving portion 212 forms a single node ring. By engaging two single node rings a two node ring is formed. The bending
25 section assembly 122 comprises a plurality of bending pieces. Each of the
bending pieces comprises a two node rings. The plurality of bending pieces (also referred to as node rings) are alternately connected to form a bending tube. The receiving portion 212 is manufactured such that the protruding

portion 208 of a next ring is engaged with the receiving portion 212 of the
previous ring. The protruding portion 208 is engaged in the receiving
portion 212 through a notches provided in the protruding portion and
receiving portion. The inverted C-shaped protrusion comprises a curved
5 notch 226 at interior portion and the inverted C- shaped recess comprises
curved notch 224 at exterior portion. The notches of protrusion 206 and notches of recess 224 are made in such a way that the notches of protrusion 206 and the notches of recess 224 get interlocked with each other. [0038] A first end section 202 comprises a first end 216 and a second end
10 222. The second end 222 comprises a first receiving portion 204. The first
receiving portion 204 comprises a pair of protrusions 206. The pair of protrusions 206 is curvilinear. The pair of protrusions 206 comprises an inverted C-shaped recess. The pair of protrusions 206 in the first end section is manufactured in such a way that the protruding portion of a next ring is
15 engaged in the receiving portion 204 of the first end section 202.
[0039] Referring to the Figure 3, the bending section in an assembled state is illustrated. During assembly, the first receiving portion 204 is engaged with the protruding portion 208. The receiving portion 212 is engaged with the last protruding portion 308 thereby forming the bending section
20 assembly 122 for an endoscopic device. In an embodiment, assembly of
plurality of rings comprising steps of engaging the receiving portion 204 of first end section 202 with the protruding portion of the second ring, engaging the receiving portion of the second ring with the protruding portion of a subsequent ring till the last end section 302 depending on the
25 length of the bending section.
[0040] Exemplary embodiments discussed above may provide certain advantages. Though not required to practice aspects of the disclosure, these following advantages may include:

[0041] Some embodiments of the bending section support to guided notches for not to come out from the holes when tensile force is applied by the wires.
[0042] Some embodiments of bending section provide unbreakable
5 arrangement for bending section, when tensile force and pressure increases.
[0043] Although the description provides implementations of a bending
section assembly for an endoscopic device, it is to be understood that the
above descriptions are not necessarily limited to the specific features or
methods of systems. Rather, the specific features and methods are disclosed
10 as examples of implementations for the bending section assembly for an
endoscopic device.

We claim:
1. A bending section assembly (122) for an endoscopic device comprises:
a plurality of rings (218), wherein each of the rings (218)
5 comprises a protruding portion (208) at a first end and a
receiving portion (212) at a second end, wherein the protruding
portion (208) comprises an inverted C-shaped structure and the
receiving portion (212) comprises an inverted C-shaped recess;
a first end section (202), wherein the end section (202)
10 comprises a first end (216) and a second end (222), wherein the
second end (222) comprises a first receiving portion (204),
wherein the first receiving portion (204) comprises a pair of
protrusions (206), wherein the pair of protrusions (206) is
curvilinear, wherein the pair of protrusions (206) comprises an
15 inverted C-shaped recess;
a last end section (302), wherein the last end section (302)
comprises a first end and a second end (304), wherein the first
end comprises a last protruding portion (308), wherein the last
protruding portion (308) comprises an inverted C-shaped
20 protrusion and a second end (304) comprises a curved recess
(306) at centre;
wherein during assembly, the first receiving portion (204)
is engaged with the protruding portion (208), wherein the
receiving portion (212) is engaged with the last protruding
25 portion (308) thereby forming the bending section assembly (122)
for an endoscopic device.

2. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, wherein the bending section assembly (122)
comprises a plurality of bending pieces, wherein each of the bending
pieces comprises a two node rings, wherein the two node rings are
5 formed by engaging two single node rings, wherein each ring
comprising a protruding portion and a receiving portion forms a single node ring.
3. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, comprises a rectangular groove (210) on a top
10 portion and a bottom portion of each of the rings (218), wherein the
rectangular groove (210) comprises a pair of rectangular cavities (214) on both sides of the rectangle.
4. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, wherein the receiving portion (212) is
15 manufactured such that the protruding portion (208) of a next ring is
engaged with the receiving portion (212) of the previous ring.
5. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, wherein the protruding portion (208) is engaged
in the receiving portion (212) through a notches provided in the
20 protruding portion and the receiving portion.
6. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, wherein the pair of protrusions (206) in the first
end section (202) is manufactured in such a way that the protruding
portion (208) of a next ring is engaged in the receiving portion (204)
25 of the first end section (202).
7. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, wherein the inverted C-shaped protrusion
comprises a curved notch (226) at interior portion and the inverted
C- shaped recess comprises curved notch (224) at exterior portion.

8. The bending section assembly (122) for the endoscopic device as
claimed in claim 6, wherein notches of protrusion (206) and notches
of recess (224) are made in such a way that the notches of protrusion
(206) and the notches of recess (224) get interlocked with each other.
5 9. The bending section assembly (122) for the endoscopic device as
claimed in claim 5, wherein notches are made with protruded material.
10. The bending section assembly (122) for the endoscopic device as
claimed in claim 1, wherein assembly of plurality of rings comprising
10 steps of engaging the receiving portion (204) of the first end section
(202) with the protruding portion of the second ring, engaging the receiving portion of the second ring with the protruding portion of a subsequent ring till the last end section (302) depending on the length of the bending section.
15
Dated: March 21st, 2024