AU2017434607B2 - Locking mechanism for automatic dustproofing device of railway locomotive vehicle - Google Patents
Locking mechanism for automatic dustproofing device of railway locomotive vehicle Download PDFInfo
- Publication number
- AU2017434607B2 AU2017434607B2 AU2017434607A AU2017434607A AU2017434607B2 AU 2017434607 B2 AU2017434607 B2 AU 2017434607B2 AU 2017434607 A AU2017434607 A AU 2017434607A AU 2017434607 A AU2017434607 A AU 2017434607A AU 2017434607 B2 AU2017434607 B2 AU 2017434607B2
- Authority
- AU
- Australia
- Prior art keywords
- locking
- control device
- dust control
- automatic
- automatic dust
- 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.)
- Active
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G7/00—Details or accessories
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Quick-Acting Or Multi-Walled Pipe Joints (AREA)
- Lock And Its Accessories (AREA)
- Clamps And Clips (AREA)
Abstract
A locking mechanism for an automatic dustproofing device (1) of a railway locomotive vehicle, the automatic dustproofing device (1) being provided at an opening of a connector body (2); the locking mechanism is used for locking the displaced automatic dustproofing device (1) when an automatic dustproofing-type hose connector is required to be connected, without affecting normal connection of said connector by an operator; and the locking mechanism is used for unlocking the locked automatic dustproofing device (1) during the process of connecting the automatic dustproof hose connector, without affecting the connection state of the automatic dustproofing-type hose connector; after the removal of the automatic dustproof hose connector, the automatic dustproofing device (1) is automatically re-engaged so as to achieve the dustproofing effect.
Description
Field of the Invention
The invention belongs to the field of railway rolling stock, in particular to a locking mechanism for an automatic dust control device of railway rolling stock.
Description of the Related Art
For railway rolling stock of the prior art, if a hose connector is disconnected, manual sealing of an opening of the hose connector is required to prevent foreign matters from entering into the connector, which causes considerable risks and inconvenience during operation. If the opening of the hose connector is not sealed, these foreign matters entering a brake pipe are difficult to be cleared, and may easily affect operation of brake components, and pose significant threats to driving safety.
To overcome these defects, an automatic dust control device is additionally installed on the hose connector of the prior art to play a good role in dust control. A torsional spring is arranged in the automatic dust control device for circumferential rotation of the automatic dust control device. However, when the hose connector is attached with the automatic dust control device, the automatic dust control device needs to be turned aside on site before coupling. Due to reset force of the automatic dust control device turned aside, an operator needs to rotate and connect two hose connectors and prevent reset action of the automatic dust control device for coupling. Therefore, the on-site coupling is very difficult to be realized.
Summary of the Invention
An object of the invention is to provide a locking mechanism for an automatic dust control device of railway rolling stock capable of realizing convenient and quick coupling of a hose connector with the automatic dust control device and enabling the automatic dust control device to reset automatically after the hose connector is uncoupled to realize effectively dust control to address the problems mentioned above.
The technical solution of the invention is realized as follows: a locking mechanism for an automatic dust control device of railway rolling stock is provided, and the automatic dust control device is arranged at an opening of a connector body of an automatic dustproof hose connector. The lock mechanism is characterized in that the locking mechanism is used for locking the removed automatic dust control device when the automatic dustproof hose connector needs to be coupled, and unlocking the locked automatic dust control device during coupling process of the automatic dustproof hose connector; the locking mechanism is provided with a locking part and an unlocking part, and the automatic dust control device is provided with a locking handle in corresponding fit with the locking part of the locking mechanism; the automatic dust control device is removed and the locking handle on the automatic dust control device is locked with the locking part of the locking mechanism in a fit manner to couple the automatic dustproof hose connector; when two automatic dustproof hose connectors are connected in rotation, the connector body unlocks the automatic dust control device on the other connector body by means of the unlocking part of the locking mechanism; and the unlocked automatic dust control device abuts against an external peripheral surface of the corresponding connected connector body.
For the locking mechanism for an automatic dust control device of railway rolling stock according to the present invention, the locking mechanism comprises a push rod, a locking rod, a locating rod and a locking spring arranged in a mounting hole of the connector body, one end of the locking spring abuts against an end surface of the locating rod, and the other end thereof abuts against an end surface of a compression screw in threaded connection with the mounting hole of the connector body in order to adjust a pre-tightening force of the locking spring by means of the compression screw; the locking rod is sleeved on the locating rod, and the push rod is sleeved on an end of the locating rod to form a locking part at an end of the locking rod in fit with to the locking handle of the automatic dust control device; and an end of the push rod protrudes from the mounting hole of the connector body to form an unlocking part for unlocking the locked automatic dust control device when two automatic dustproof hose connectors are connected in rotation.
For the locking mechanism for an automatic dust control device of railway rolling stock according to the present invention, a locking spring protective sleeve sleeved an the external peripheral surface of the locking spring is arranged in the mounting hole of the connector body, and the locking spring protective sleeve is fitted together with the locating rod by means of step fit.
For the locking mechanism for an automatic dust control device of railway rolling stock according to the present invention, a locking protruding part is arranged at the end of the locking rod, and a locking groove in corresponding fit with the locking protruding part at the end of the locking rod is arranged on the locking handle of the automatic dust control device.
For the locking mechanism for an automatic dust control device of railway rolling stock according to the present invention, when the automatic dust control device needs to be locked, the locking handle of the automatic dust control device enables the locking rod to overcome an elastic force of the locking spring and to be pressed until the locking protruding part of the locking rod is in corresponding fit with the locking groove of the locking handle, the locking rod resets under the action of the locking spring, so that the locking handle of the automatic dust control device is locked with the locking rod in this case; when two automatic dustproof hose connectors are connected in rotation, an outer wall of the connector body produces pressure against the push rod that drives the locking rod to overcome the elastic force of the locking spring and be pressed, the locking handle of the automatic dust control device is thereby unlocked from the locking rod, and the automatic dust control device resets under the action of a reset structure until the automatic dust control device abuts against to the external peripheral surface of the connector body; and
When the two automatic dustproof hose connectors are uncoupled, the unblocked automatic dust control device rotates automatically back to the opening of the connector body under the action of the reset structure and blocks the opening completely.
The invention is mainly designed for coupling and uncoupling of the automatic dustproof hose connector for the railway rolling stock. When the automatic dustproof hose connector is coupled, an operator locks the turned-on automatic dust control device by means of the locking mechanism without affecting normal coupling, and uses the connector body of the automatic dustproof hose connector to unlock the locked automatic dust control device during the coupling process. The unlocked automatic dust control device does not affect coupling state of the automatic dustproof hose connector, and the automatic dustproof can reset automatically upon uncoupling of the automatic dustproof hose connector, thus realizing dust control effect and preventing foreign matters from entering the unconnected automatic dustproof hose connector when the operator forgets unlocking.
Description of the Drawings
Figure 1 shows application of the invention on an automatic dustproof hose connector.
Figure 2 is a sectional view of the locking mechanism of the invention.
Figure 3 is a schematic diagram of locking of the automatic dust control device of the invention.
Figure 4 is a schematic diagram showing coupling of two automatic dustproof hose connectors and unlocking of the automatic dust control device.
Marks in the figures are as follows: 1-automatic dust control device, 2-connector body, 3-locking handle, 4-push rod, 5-locking rod, 6-locating rod, 7-locking spring, 8-compression screw, and 9-locking spring protective sleeve.
Detailed Description of the Preferred Embodiments
The invention will be described in detail in combination with drawings.
The invention will be further described in detail in combination with drawings and embodiments for clear understanding of the object, technical solution and advantages of the invention. It should be understood that various embodiments described herein are only used to explain the invention rather than limiting the invention.
Figure 1 and 2 show a locking mechanism for an automatic dust control device of railway rolling stock, and the automatic dust control device 1 is arranged at a opening of a connector body 2 of an automatic dustproof hose connector; the locking mechanism is used for locking the removed automatic dust control device 1 when the automatic dustproof hose connector needs to be coupled, and unlocking the locked automatic dust control device 1 during coupling process of the automatic dustproof hose connector; the locking mechanism is provided with a locking part and an unlocking part, and the automatic dust control device 1 is provided with an locking handle 3 in corresponding fit with the locking part of the locking mechanism; the automatic dust control device 1 is removed and the locking handle 3 on the automatic dust control device 1 is locked with the locking part of the locking mechanism in a fit manner to couple the automatic dustproof hose connector, and when two automatic dustproof hose connectors are connected in rotation, the connector body 2 unlocks the automatic dust control device 1 on the other connector body 2 by means of the unlocking part of the locking mechanism, and the unlocked automatic dust control device 1 abuts against an external peripheral surface of the corresponding connected connector body 2.
The locking mechanism comprises a push rod 4, a locking rod 5, a locating rod 6 and a locking spring 7 arranged in a mounting hole of the connector body 2, one end of the locking spring 7 abuts against an end surface of the locating rod 6, and the other end thereof abuts against an end surface of a compression screw 8 in threaded connection with the mounting hole of the connector body 2 in order to adjust a pre-tightening force of the locking spring 7 by means of the compression screw 8; a locking spring protective sleeve 9 sleeved on an peripheral surface of the locking spring 7 is arranged in the mounting hole of the connector body 2, and the locking spring protective sleeve 9 is fitted together with the locating rod 6 by means of step fit; and the locking rod 5 is sleeved on the locating rod 6, and the push rod 4 is sleeved an the end of the locating rod 6 to form a locking part at an end of the locking rod 5 in fit with the locking handle 3 of the automatic dust control device 1. In this embodiment, a locking protruding part 5a is arranged at the end of the locking rod 5, and a locking groove in corresponding fit with the locking protruding part 5a at the end of the locking rod 5 is arranged on the locking handle 3 of the automatic dust control device 1. An end of the push rod 4 protrudes from the mounting hole of the connector body 2 to form an unlocking part for unlocking the locked automatic dust control device 1 when two automatic dustproof hose connectors are connected in rotation.
As shown in Figure 3, when the automatic dust control device 1 needs to be locked, the automatic dust control device is pushed aside by an external force to an appropriate angle such that the locking handle 3 of the automatic dust control device 1 enables the locking rod 5 to overcome an elastic force of the locking spring 7 and be pressed until the locking protruding part 5a of the locking rod 5 in corresponding fit with the locking groove of the locking handle 3, and the locking rod 5 resets under the action of the locking spring 7. In this case, the locking handle 3 of the automatic dust control device 1 is locked with the locking rod 5. The locking state is hardly to be broken without an external force, so that the connector body can be coupled as easily and conveniently as before.
As shown in Figure 4, when two automatic dustproof hose connectors are connected in rotation, an outer wall of the connector body 2 produces pressure against the push rod 4 that drives the locking rod 5 to overcome the elastic force of the locking spring 7 and be pressed, the locking handle 3 of the automatic dust control device 1 is thereby unlocked from the locking rod 5, and the automatic dust control device 1 resets under the action of a reset structure until the automatic dust control device 1 abuts against to the external peripheral surface of the connector body 2. In this case, the automatic dust control device stops rotation and completes unlocking;
When the two automatic dustproof host connectors are uncoupled, the unblocked automatic dust control device 1 rotates automatically back to the opening of the connector body 2 under the action of the reset structure and blocks the opening completely, thus realizing dustproof effect.
The above mentioned embodiments are only preferred embodiments of the invention and not used to limit the invention. Any modification, equivalent replacement and improvement made within the spirit and rule of the invention shall be incorporated in the protection scope of the invention.
Claims (5)
1. A locking mechanism for an automatic dust control device of railway rolling stock, the automatic dust control device (1) being arranged at an opening of a connector body of an automatic dustproof hose connector (2), characterized in that: the locking mechanism is used for locking the removed automatic dust control device (1) when the automatic dustproof hose connector needs to be coupled, and unlocking the locked automatic dust control device (1) during coupling process of the automatic dustproof hose connector; the locking mechanism is provided with a locking part and an unlocking part, and the automatic dust control device (1) is provided with an locking handle (3) in corresponding fit with the locking part of the locking mechanism; the automatic dust control device (1) is removed and the locking handle (3) on the automatic dust control device (1) is locked with the locking part of the locking mechanism in a fit manner to couple the automatic dustproof hose connector; when two automatic dustproof hose connectors are connected in rotation, the connector body (2) unlocks the automatic dust control device (1) on the other connector body (2) by means of the unlocking part of the locking mechanism; and the unlocked automatic dust control device (1) abuts against an external peripheral surface of the corresponding connected connector body (2).
2. The locking mechanism for an automatic dust control device of railway rolling stock according to claim 1, characterized in that the locking mechanism comprises a push rod (4), a locking rod (5), a locating rod (6) and a locking spring (7) arranged in a mounting hole of the connector body (2), one end of the locking spring (7) abuts against an end surface of the locating rod (6), and the other end thereof abuts against an end surface of a compression screw (8) in threaded connection with the mounting hole of the connector body (2) in order to adjust a pre-tightening force of the locking spring (7) by means of the compression screw (8); the locking rod (5) is sleeved on the locating rod (6), and the push rod (4) is sleeved on an end of the locating rod (6) to form a locking part at an end of the locking rod (5) in fit with the locking handle (3) of the automatic dust control device (1); and an end of the push rod (4) protrudes from the mounting hole of the connector body (2) to form an unlocking part for unlocking the locked automatic dust control device (1) when two automatic dustproof hose connectors are connected in rotation.
3. The locking mechanism for an automatic dust control device of railway rolling stock according to claim 2, characterized in that a locking spring protective sleeve (9) sleeved on an external peripheral surface of the locking spring (7) is arranged in the mounting hole of the connector body (2), and the locking spring protective sleeve (9) is fitted together with the locating rod (6) by means of step fit.
4. The locking mechanism for an automatic dust control device of railway rolling stock according to claim 2, characterized in that a locking protruding part (5a) is arranged at the end of the locking rod (5), and a locking groove in corresponding fit with the locking protruding part (5a) at the end of the locking rod (5) is arranged on the locking handle (3) of the automatic dust control device (1).
5. The locking mechanism for an automatic dust control device of railway rolling stock according to claim 2, 3 or 4, characterized in that when the automatic dust control device (1) needs to be locked, the locking handle (3) of the automatic dust control device (1) enables the locking rod (5) to overcome an elastic force of the locking spring (7) and to be pressed until the locking protruding part (5a) of the locking rod (5) is in corresponding fit with the locking groove of the locking handle (3), and the locking rod (5) resets under the action of the locking spring (7), so that the locking handle (3) of the automatic dust control device (1) is locked with the locking rod (5) in this case;
when two automatic dustproof hose connectors are connected in rotation, an outer wall of the connector body (2) produces pressure against the push rod (4) that drives the locking rod (5) to overcome the elastic force of the locking spring (7) and be pressed, the locking handle (3) of the automatic dust control device (1) is thereby unlocked from the locking rod (5), and the automatic dust control device (1) resets under the action of a reset structure until the automatic dust control device (1) abuts against to the external peripheral surface of the connector body (2); and
When the two automatic dustproof host connectors are uncoupled, the unblocked automatic dust control device (1) rotates automatically back to the opening of the connector body (2) under the action of the reset structure and blocks the opening completely.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710879039.9A CN107618532B (en) | 2017-09-26 | 2017-09-26 | Locking mechanism for automatic dustproof device of railway rolling stock |
| CN201710879039.9 | 2017-09-26 | ||
| PCT/CN2017/115381 WO2019061838A1 (en) | 2017-09-26 | 2017-12-11 | Locking mechanism for automatic dustproofing device of railway locomotive vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU2017434607A1 AU2017434607A1 (en) | 2020-02-06 |
| AU2017434607B2 true AU2017434607B2 (en) | 2024-02-08 |
Family
ID=61090583
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2017434607A Active AU2017434607B2 (en) | 2017-09-26 | 2017-12-11 | Locking mechanism for automatic dustproofing device of railway locomotive vehicle |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN107618532B (en) |
| AU (1) | AU2017434607B2 (en) |
| WO (1) | WO2019061838A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109830868B (en) * | 2019-02-20 | 2020-09-01 | 眉山中车制动科技股份有限公司 | Dust keeper and hose connection equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2537095A (en) * | 1948-11-30 | 1951-01-09 | William M Schroeder | Fluid coupling |
| US2996314A (en) * | 1960-01-25 | 1961-08-15 | Aspeek Reginald James | Automatic closure device for glad-hand couplings |
| US3208623A (en) * | 1963-09-25 | 1965-09-28 | Bendix Westinghouse Automotive | Glad hand cover |
| CN101625059A (en) * | 2009-08-13 | 2010-01-13 | 北京中铁瑞尔制动配件有限公司 | Dust cover for hose connector |
| US20130323939A1 (en) * | 2012-05-31 | 2013-12-05 | Dale A. Brown | Coupling and conduit for consist communication system |
| US20130319567A1 (en) * | 2012-05-31 | 2013-12-05 | Dale A. Brown | Consist communication system having inductive transmission |
| US20130319563A1 (en) * | 2012-05-31 | 2013-12-05 | Dale A. Brown | Consist communication system |
Family Cites Families (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4129323A (en) * | 1977-07-14 | 1978-12-12 | Westinghouse Air Brake Company | Lockable hose coupling |
| US4125279A (en) * | 1977-07-21 | 1978-11-14 | Westinghouse Air Brake Company | Lockable hose coupling |
| SU1008047A1 (en) * | 1981-10-01 | 1983-03-30 | Izbrekht Aleksandr R | Apparatus for controlling air-closing members of lines of automatic connector of couplings of rail vehicles |
| CN1104969A (en) * | 1994-01-04 | 1995-07-12 | 左庆华 | Flexible pipe jointing valve for railway vehicle brake |
| US5911444A (en) * | 1996-01-31 | 1999-06-15 | The Whitaker Corporation | Automatic locking mechanism for air brake hose coupling members |
| KR20030093033A (en) * | 2002-06-01 | 2003-12-06 | 현대자동차주식회사 | locking release apparatus of parking break system for vehicle |
| US6669237B1 (en) * | 2002-07-26 | 2003-12-30 | New York Air Brake Corporation | Air brake hose coupling member |
| US20060043731A1 (en) * | 2004-08-26 | 2006-03-02 | Wabtec Holding Corp. | Locking device for an air brake hose coupling member |
| CN100406800C (en) * | 2006-08-29 | 2008-07-30 | 中国南车集团眉山车辆厂 | Self-sealing dust-proof soft pipe connector |
| FR2926276B1 (en) * | 2008-01-11 | 2010-09-03 | Alstom Transport Sa | VENTILATION ASSEMBLY OF A RAILWAY VEHICLE APPARATUS |
| CN102530010B (en) * | 2012-02-29 | 2014-06-11 | 白鹏 | Automatic connecting/disconnecting device for braking air ducts of railroad vehicles |
| KR20130129691A (en) * | 2012-05-21 | 2013-11-29 | 한국철도공사 | Virtual pressure measuring jig of brake system for railway vehicle |
| CN102720838B (en) * | 2012-06-30 | 2014-11-12 | 中国北车集团大连机车车辆有限公司 | Fixing dustproof device for locomotive end connecting pipe |
| US9366362B2 (en) * | 2013-12-10 | 2016-06-14 | Ireco, Llc | Spring-style air brake hose support |
| US10267448B2 (en) * | 2014-04-25 | 2019-04-23 | Bani-Asaf Inc. | Device to heat flexible hose connectors for transport vehicles |
| US9625060B2 (en) * | 2014-10-30 | 2017-04-18 | Ireco, Llc | Air brake hose support bracket |
| JP2016124306A (en) * | 2014-12-26 | 2016-07-11 | 東日本旅客鉄道株式会社 | Railway vehicle inspection device |
| ITUB20154755A1 (en) * | 2015-11-05 | 2017-05-05 | Co El Da Software Srl | AUTOMATIC ATTACHMENT AND RELEASE SYSTEM OF CIRCULATING MEDIA ON THE RAILWAY NETWORK |
| CN205417647U (en) * | 2015-12-28 | 2016-08-03 | 中车北京二七机车有限公司 | Dust guard mount pad and locomotive |
| CN207403751U (en) * | 2017-09-26 | 2018-05-25 | 眉山中车制动科技股份有限公司 | A kind of lockable mechanism for rail vehicles automatic anti-dust device |
-
2017
- 2017-09-26 CN CN201710879039.9A patent/CN107618532B/en active Active
- 2017-12-11 AU AU2017434607A patent/AU2017434607B2/en active Active
- 2017-12-11 WO PCT/CN2017/115381 patent/WO2019061838A1/en not_active Ceased
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2537095A (en) * | 1948-11-30 | 1951-01-09 | William M Schroeder | Fluid coupling |
| US2996314A (en) * | 1960-01-25 | 1961-08-15 | Aspeek Reginald James | Automatic closure device for glad-hand couplings |
| US3208623A (en) * | 1963-09-25 | 1965-09-28 | Bendix Westinghouse Automotive | Glad hand cover |
| CN101625059A (en) * | 2009-08-13 | 2010-01-13 | 北京中铁瑞尔制动配件有限公司 | Dust cover for hose connector |
| US20130323939A1 (en) * | 2012-05-31 | 2013-12-05 | Dale A. Brown | Coupling and conduit for consist communication system |
| US20130319567A1 (en) * | 2012-05-31 | 2013-12-05 | Dale A. Brown | Consist communication system having inductive transmission |
| US20130319563A1 (en) * | 2012-05-31 | 2013-12-05 | Dale A. Brown | Consist communication system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107618532B (en) | 2024-02-20 |
| CN107618532A (en) | 2018-01-23 |
| WO2019061838A1 (en) | 2019-04-04 |
| AU2017434607A1 (en) | 2020-02-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20150233509A1 (en) | Bayonet coupling for the disconnectable connection of pipelines | |
| KR101294757B1 (en) | Coupling element | |
| US20160159175A1 (en) | Self-locking compact coupling | |
| US10612724B2 (en) | Device for supplying pressurised fluid | |
| AU2017434607B2 (en) | Locking mechanism for automatic dustproofing device of railway locomotive vehicle | |
| JP2022534198A5 (en) | ||
| CN107600103B (en) | Air brake hand relieving device | |
| EP3418082B1 (en) | Selective locking of guiding funnel | |
| US20200309301A1 (en) | Quick connect coupling | |
| US7946197B2 (en) | Breaker racking tool | |
| CN100507326C (en) | Coupling joint of compression cylinder | |
| CN207403751U (en) | A kind of lockable mechanism for rail vehicles automatic anti-dust device | |
| CN103187669A (en) | Interphone and connector thereof | |
| CN109458152B (en) | Oil well wellhead anti-theft device | |
| ITTO20091046A1 (en) | LOCK WITH A REMOTE ACTUATOR FOR A VEHICLE PANEL | |
| US11112046B2 (en) | Safety system for cam lock couplings | |
| JPH0914554A (en) | Connection structure of radioactive fluid piping | |
| CN205633556U (en) | Quick tool to lock of box | |
| EP2220416B1 (en) | Cap for a fluid coupling member | |
| TWM512616U (en) | Adjustable fire door locks can be installed without pressing | |
| EP2486320B1 (en) | Hose connector lock | |
| CN104300309B (en) | A kind of anti-loose connector | |
| JPH0741500U (en) | Connection structure of radioactive fluid piping | |
| CN214818187U (en) | Sleeve tool for overhauling subway vehicle | |
| CN223190219U (en) | Anti-theft tension lock and key |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FGA | Letters patent sealed or granted (standard patent) |