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Improved Urea Mixer Device For Exhaust After Treatment System

Abstract: An embodiment herein provides a urea mixer device (100). The urea mixer device (100) comprises a perforated C-shape plate (1), a mixing tube (2), a perforated tube (4), a Z-shape plate (5) and a splash plate (6). The C-shape plate (1) directs the flow of gas partially into the mixing tube (2) while allowing some amount of gas to flow through the C-shape plate 10 (1). The mixing tube (2) with specialised deflectors (9a, 9b) and perforations that ensures good swirl and evaporation of injected urea. The splash plate (6) disperses the injected urea which are not evaporated in the swirl. The perforated tube (4) is for to enhance the uniformity index. The Z-shape plate (5) is for to channel the exhaust gas from mixing tube (2) to the perforated tube (4) via the C-shape plate (1). The adaptor and mounting plate (7,8) 15  that ensures optimal tip penetration inside the mixer to reduce the risk of deposits near the injector tip. FIGURE 2

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Notices, Deadlines & Correspondence

Patent Information

Application #
Filing Date
01 October 2019
Publication Number
15/2021
Publication Type
INA
Invention Field
MECHANICAL ENGINEERING
Status
Email
patent@depenning.com
Parent Application
Patent Number
Legal Status
Grant Date
2024-02-28
Renewal Date

Applicants

ASHOK LEYLAND LIMITED
No. 1, Sardar Patel Road, Guindy, Chennai

Inventors

1. K. Sasikumar
Ashok Leyland Limited Technical Centre, Vellivoyal Chavadi, Via Manali New Town, Chennai 600103
2. B. Sriram
Ashok Leyland Limited Technical Centre, Vellivoyal Chavadi, Via Manali New Town, Chennai 600103
3. K. Senthilnathan
Ashok Leyland Limited Technical Centre, Vellivoyal Chavadi, Via Manali New Town, Chennai 600103
4. Krishnan Sadagopan
Ashok Leyland Limited Technical Centre, Vellivoyal Chavadi, Via Manali New Town, Chennai 600103

Specification

We Claim:
1. A urea mixer device (100) for mixing of urea and exhaust gas uniformly, comprising:
a mixing tube (2);
an urea injector (3) that injects the urea into said mixing tube (2) to mix the exhaust gas with the urea uniformly;
characterized in that,
a C-shape plate (1) having perforations, when said exhaust gas enters the urea mixer device (100), a major portion of the exhaust gas is diverted into the mixing tube (2) while remaining portion of the exhaust gas enters into the C-shape plate (1) via said perforations;
said mixing tube (2) having deflectors (9a, 9b) at an upper half (10) and bottom half (11), said deflectors (9a) at the upper half (10) of the mixing tube (2) have openings that are opposite in directions to the deflectors (9b) at the bottom half (11) of the mixing tube (2) which creates a swirl inside the mixing tube (2) in counter clockwise direction until the end of the mixing tube (2);
a Z-shape plate (5) that directs the flow of the exhaust gas from the mixing tube (2) to a perforated tube (4) via the C-shape plate (1); and
a splash plate (6) that is coupled with said mixing tube (2) at inside, said splash plate (6) disperses and evaporates any non-evaporated stream of injected urea into the swirl.
2. The urea mixer device as claimed in claim 1, wherein the exhaust gas flows down the mixing tube (2) and into a transfer chamber made by the C-shape plate (1).
3. The urea mixer device as claimed in claim 1, wherein a portion of the exhaust gas raises up via the perforated tube (4) and exits the urea mixer device (100) via the perforations, while the remaining portion of the exhaust gas exits the urea mixer device (100) through the perforations on other side of the C-shape plate (1).
4. The urea mixer device as claimed in claim 1, comprising
an adaptor mounting plate (8); and
an adaptor (7), wherein said adaptor mounting plate (8) and said adaptor (7) are welded together and are mated to the urea injector (3) using a V-Clamp to ensure optimal tip penetration inside the mixer device.

Documents

Orders

Section Controller Decision Date

Application Documents

# Name Date
1 201941039646-IntimationOfGrant28-02-2024.pdf 2024-02-28
1 201941039646-STATEMENT OF UNDERTAKING (FORM 3) [01-10-2019(online)].pdf 2019-10-01
2 201941039646-PatentCertificate28-02-2024.pdf 2024-02-28
2 201941039646-REQUEST FOR EXAMINATION (FORM-18) [01-10-2019(online)].pdf 2019-10-01
3 201941039646-Response to office action [26-02-2024(online)].pdf 2024-02-26
3 201941039646-PROOF OF RIGHT [01-10-2019(online)].pdf 2019-10-01
4 201941039646-FORM-8 [01-10-2019(online)].pdf 2019-10-01
4 201941039646-2. Marked Copy under Rule 14(2) [14-02-2024(online)].pdf 2024-02-14
5 201941039646-Retyped Pages under Rule 14(1) [14-02-2024(online)].pdf 2024-02-14
5 201941039646-FORM 18 [01-10-2019(online)].pdf 2019-10-01
6 201941039646-Written submissions and relevant documents [14-02-2024(online)].pdf 2024-02-14
6 201941039646-FORM 1 [01-10-2019(online)].pdf 2019-10-01
7 201941039646-FIGURE OF ABSTRACT [01-10-2019(online)].jpg 2019-10-01
7 201941039646-Correspondence to notify the Controller [24-01-2024(online)].pdf 2024-01-24
8 201941039646-FORM-26 [24-01-2024(online)].pdf 2024-01-24
8 201941039646-DRAWINGS [01-10-2019(online)].pdf 2019-10-01
9 201941039646-COMPLETE SPECIFICATION [01-10-2019(online)].pdf 2019-10-01
9 201941039646-US(14)-HearingNotice-(HearingDate-30-01-2024).pdf 2023-12-22
10 201941039646-ABSTRACT [22-12-2021(online)].pdf 2021-12-22
10 201941039646-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [01-10-2019(online)].pdf 2019-10-01
11 201941039646-COMPLETE SPECIFICATION [22-12-2021(online)].pdf 2021-12-22
11 201941039646-FORM-26 [12-10-2019(online)].pdf 2019-10-12
12 201941039646-FER_SER_REPLY [22-12-2021(online)].pdf 2021-12-22
12 Correspondence by Agent_Form1,Form26_15-10-2019.pdf 2019-10-15
13 201941039646-FER.pdf 2021-10-17
13 201941039646-OTHERS [22-12-2021(online)].pdf 2021-12-22
14 201941039646-FER.pdf 2021-10-17
14 201941039646-OTHERS [22-12-2021(online)].pdf 2021-12-22
15 201941039646-FER_SER_REPLY [22-12-2021(online)].pdf 2021-12-22
15 Correspondence by Agent_Form1,Form26_15-10-2019.pdf 2019-10-15
16 201941039646-COMPLETE SPECIFICATION [22-12-2021(online)].pdf 2021-12-22
16 201941039646-FORM-26 [12-10-2019(online)].pdf 2019-10-12
17 201941039646-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [01-10-2019(online)].pdf 2019-10-01
17 201941039646-ABSTRACT [22-12-2021(online)].pdf 2021-12-22
18 201941039646-COMPLETE SPECIFICATION [01-10-2019(online)].pdf 2019-10-01
18 201941039646-US(14)-HearingNotice-(HearingDate-30-01-2024).pdf 2023-12-22
19 201941039646-DRAWINGS [01-10-2019(online)].pdf 2019-10-01
19 201941039646-FORM-26 [24-01-2024(online)].pdf 2024-01-24
20 201941039646-Correspondence to notify the Controller [24-01-2024(online)].pdf 2024-01-24
20 201941039646-FIGURE OF ABSTRACT [01-10-2019(online)].jpg 2019-10-01
21 201941039646-FORM 1 [01-10-2019(online)].pdf 2019-10-01
21 201941039646-Written submissions and relevant documents [14-02-2024(online)].pdf 2024-02-14
22 201941039646-FORM 18 [01-10-2019(online)].pdf 2019-10-01
22 201941039646-Retyped Pages under Rule 14(1) [14-02-2024(online)].pdf 2024-02-14
23 201941039646-2. Marked Copy under Rule 14(2) [14-02-2024(online)].pdf 2024-02-14
23 201941039646-FORM-8 [01-10-2019(online)].pdf 2019-10-01
24 201941039646-PROOF OF RIGHT [01-10-2019(online)].pdf 2019-10-01
24 201941039646-Response to office action [26-02-2024(online)].pdf 2024-02-26
25 201941039646-REQUEST FOR EXAMINATION (FORM-18) [01-10-2019(online)].pdf 2019-10-01
25 201941039646-PatentCertificate28-02-2024.pdf 2024-02-28
26 201941039646-STATEMENT OF UNDERTAKING (FORM 3) [01-10-2019(online)].pdf 2019-10-01
26 201941039646-IntimationOfGrant28-02-2024.pdf 2024-02-28

Search Strategy

1 201941039646ssE_10-06-2021.pdf

ERegister / Renewals

3rd: 28 May 2024

From 01/10/2021 - To 01/10/2022

4th: 28 May 2024

From 01/10/2022 - To 01/10/2023

5th: 28 May 2024

From 01/10/2023 - To 01/10/2024

6th: 01 Oct 2024

From 01/10/2024 - To 01/10/2025

7th: 30 Sep 2025

From 01/10/2025 - To 01/10/2026