CA2040388A1 - Bevel gear assembly - Google Patents
Bevel gear assemblyInfo
- Publication number
- CA2040388A1 CA2040388A1 CA002040388A CA2040388A CA2040388A1 CA 2040388 A1 CA2040388 A1 CA 2040388A1 CA 002040388 A CA002040388 A CA 002040388A CA 2040388 A CA2040388 A CA 2040388A CA 2040388 A1 CA2040388 A1 CA 2040388A1
- Authority
- CA
- Canada
- Prior art keywords
- lug
- gear
- propulsion device
- marine propulsion
- bevel gear
- 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
- 230000000712 assembly Effects 0.000 claims description 8
- 238000000429 assembly Methods 0.000 claims description 8
- 238000002485 combustion reaction Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 description 13
- 230000002441 reversible effect Effects 0.000 description 5
- 150000002500 ions Chemical class 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007935 neutral effect Effects 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 1
- 108010052322 limitin Proteins 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/02—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing
- B63H23/06—Transmitting power from propulsion power plant to propulsive elements with mechanical gearing for transmitting drive from a single propulsion power unit
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Gears, Cams (AREA)
- Gear Transmission (AREA)
- Structure Of Transmissions (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
ABSTRACT
A bevel gear assembly comprising a gear portion including a hollow, generally cylindrical hub portion and a tooth portion extending from the hub portion, a lug portion having thereon a lug, and bolts for securing the lug portion to the gear portion.
A bevel gear assembly comprising a gear portion including a hollow, generally cylindrical hub portion and a tooth portion extending from the hub portion, a lug portion having thereon a lug, and bolts for securing the lug portion to the gear portion.
Description
2 ~ 3 ~
BEVEL GEAR ASSEMBLY
BACKGROUND OF THE INVENTION
1. Fi~ld of the Invention This invention relates to bevel gears, and, more particularly, to bevel gears in the shift apparatus of a reversible transmission in a marine propulsion device.
2. DescriPtion of the Prior Art The prior art relating to the shift apparatus for shifting a reversible transmission of a marine propulsion device typically includes a control member which is movable axially of the propeller shaft for actuating the transmission.
The shift apparatus provides means for moving the control member axially in response to operator actuation of a remotely located control device. The operation of a marine propulsion device shift apparatus is further described in U.S. Patent 4,849,147 to Higby et al. which is hereby incorporated by reference.
Known bevel gears utilized in these transmissions are one-piece constructions with the lugs of the gear machined directly into the face of the gear. One consequence of machining the lugs directly into the face of the gear is that if the lugs are damaged the entire gear will be damaged.
Attention is directed to the following U.S. Patents:
Patent Number Inventor Issue Date 4,865,570 Higby et al. September 12, 19)39 4,621,714 Skurka November 11, 1986 3,724,612 Spain April 3, 1973 1,913,802 Gregory June 13, 1933 t~ i3 ~-2-SUMMARY OF THE INVENTION
The invention provides a marine propul~ion device comprising a housing, a propeller shaft supported by the housing and adapted to carry a propeller, a first bevel ~ear assembly comprising a f irst gear port.ion rotatable relative to the propeller shaft, a first lug portion, and means for removably securing the first lug portion to the first qear portion for common rotation therewith, a clutch dog connected to the propeller shaft for common rotation therewith and for axial movement relative thereto, and means for moving the clutch dog into and out of engagement with the first lug portion.
The invention also provides a bevel gear assembly comprising a gear portion includi.ng a hollow, generally cylindrical body portion, a bevel gear portion extending from the cylindrical body portion, a lug portion having thereon a lug, and means for securing the lug portion to the gear portion.
The invention also provides a marine propulsion device comprising a housing, a propeller shaft supported by the housing and adapted to carry a propeller, a first bevel gear assembly comprising a first gear portion rotatable relative to the propeller shaft, a first lug portion, and means for removably securing the first lug portion to the first gear portion for cornmon rotation therewith, a second bevel gear portion comprising a second gear portion rotatable relative to the propeller shaft, a second lug portion, and means for removably securing the second lug portion to the gear portion for common rotation therewlth, a clutch dog connected ~o the propeller shaft for common rotation therewith and for axial movement relative thereto, and means for selectively and $ ~
alternatively moving the clutch dog into and out of engagement with the first and second lug portions of the fir3t and second bevel gear assemblies.
A principal feature of the inven~ion is the provision of a bevel gear asse~bly which has a separate gear portion and a separate lug portion and means for securing the lug portion to the gear portion. This separate lug portion will reduce the need to replace the entire gear assembly when only the lug portion or the gear portion is damaged.
Also, a separate lug portion will permit the use of a single gear design with multiple lug 9eometries. This will reduce manufacturing costs in that it will not be necessary to produce and keep in inventory smaller quantities of nearly identical gears.
Other principal features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a marine propulsion device embodying the invention.
FIG. 2 is an enlarged, vertical cross-sectional view of the shift apparatus.
FIG. 3 is an exploded prospective view of the bevel gear assembly.
Before one embodiment of the invention is explained in detail, it is to be understood that the invention is not limited in its appl:;cation to the details of construction and the arrangement of components set forth in the following 3 ~
description or illustrated in the drawings. The invention is capahle of other ~mbodiments and of being practiced or carried out in various way3. Also, it should be understood th~t the phraseology and terminology used herein is for the purpose of description and should not be regarded as limitin~.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A marine propulsion device 10 embodying the invention is illustrated in FIG. 1. The marine propulsion device 10 comprises a mounting bracket or assembly 12 fixedly mounted on the transom 14 of a boat.
The marine propulsion device 10 also comprises a propulsion unit 16 mounted on the mounting assembly 12. The propulsion unit 16 includes a power head 18 which includes an internal combustion engine 20. The propulsion unît 16 further includes a lower unit 22 which supports the power head 18 and which includes a lower gearcase 24.
As shown in FIGS. 1 and 2, the marine propulsion device 10 also comprises a generally horizontal propeller shaft 26 having therein an ~ial bore 27, having thereon a propeller 28 (Fig. 1), and being rotatably mounted in the lower gearcase 24. The device 10 also comprises a drive gear 30 (Fig. 2) rotatably mounted in the lower gearcase 24. The engine 20 is drivingly connected to the drive gear 30 by a driveshaft 32.
The marine propulsion device 10 further comprises (see Fig. 2) a reversible transmission 34 for selectively effecting driving engagement between the dri~e gear 30 and the propeller shaft 26. While various suitable transmissions can be employed, in the preferred embodiment, the transmission 34 i~
located in the lower gearcase 24 and includes a pair of axially 3 ~
--s--spaced bevel gear a6semblies 36 and 38. Each of the bevel gear assemblie~ 36 and 38 is comprised of (see FIG. 3~ a gear portion 42 which is supported in surrounding relation to the propeller shaft 26 and which is rotatable relative to the propeller shaft 26. The gear portion 42 further comprises a hollow, generally cylindrical hub portion 44 which has therein a central bore 46 throuqh which the propell~r shaft 26 extends, and a tooth portion 48 which meshes with the drive gear 30 and which extends from the hub portion 44. Each gear assembly 36, 38 is also comprised of an annular lug portion 50 having thereon a plurality of lugs 52 and having a central bore 54 which is aligned with the bore 46 in the gear portion 42 and through which the propeller shaft 26 extends. Each gear asser~ly 36, 38 is further comprised of means 56 for removably securing the lug portion 50 to the gear portion 42 for cornmon rotation therewith. The means 56 for removably securing the lug portion 44 to the gear portion 42 preferably includes one or more connecting merQbers extendinq through the lug portion 50 and into threaded apertures S7 in the gear portion 42. Any suitable connecting member or members, such as bolts or screws, can be employed.
The transmission 34 al~o include~ (see Fig. 2) a clu~ch dog 58 which is splined to the propeller shaft 26 for common rotation therewith and for axial movement relative thereto.
The transmission 34 also includes means for selectively and alternatively movinq the clutch dog 58 into and out of engagement with the lugs 52 on the lug portions 50 o the gear assemblies 36 and 3~. Preferably, such mean3 includes -6~ 3 ~ ~
a selector shaft 60 which extends through the axial bore 27 in the propeller shaft 26 and which is movable axially of the propeller shaft 26. The selector shaft 60 has thereon a p.n 62 which is engageable with the clutch dog 58 for moving the clutch dog 58 with the selector shaft 60 axially of the propeller shaft 26. Thusl the selector shaft 60 is movable axially of the propeller shaft 2h for selectively and alternatively causing driving engagement between the gear assemblies 36 and 38 and the clutch dog 58 and thereby between the bevel gear assemblies 36 and 38 and the propeller shaft 26. Such a selector shaft and clutch dog arrangement is di~closed in U.S. Patent No. 3,919,964 to Hagen which iq hereby incorporated herein by reference.
The transmission 34 transmits forward driving power to the propeller shaft 26 when the clutch dog 58 is in engagement with the lugs 52 of one of the bevel gear assemblies 36 and 3~. The transmission 34 transmits reverse driving power to the propeller shaft 26 when the clutch dog 58 is in engagement with the lugs 52 of the other of the bevel gear assemblies 36 and 38. The transmission 34 is in neutral when the clutch dog 58 is between and disengaged rom both of the bevel gear assemblies 36 and 38. Thus, axial movement of the selector shaft 60 shifts the transmission 34 between forward, neutral and reverse.
Various features of the invention are set forth in the following claims.
BEVEL GEAR ASSEMBLY
BACKGROUND OF THE INVENTION
1. Fi~ld of the Invention This invention relates to bevel gears, and, more particularly, to bevel gears in the shift apparatus of a reversible transmission in a marine propulsion device.
2. DescriPtion of the Prior Art The prior art relating to the shift apparatus for shifting a reversible transmission of a marine propulsion device typically includes a control member which is movable axially of the propeller shaft for actuating the transmission.
The shift apparatus provides means for moving the control member axially in response to operator actuation of a remotely located control device. The operation of a marine propulsion device shift apparatus is further described in U.S. Patent 4,849,147 to Higby et al. which is hereby incorporated by reference.
Known bevel gears utilized in these transmissions are one-piece constructions with the lugs of the gear machined directly into the face of the gear. One consequence of machining the lugs directly into the face of the gear is that if the lugs are damaged the entire gear will be damaged.
Attention is directed to the following U.S. Patents:
Patent Number Inventor Issue Date 4,865,570 Higby et al. September 12, 19)39 4,621,714 Skurka November 11, 1986 3,724,612 Spain April 3, 1973 1,913,802 Gregory June 13, 1933 t~ i3 ~-2-SUMMARY OF THE INVENTION
The invention provides a marine propul~ion device comprising a housing, a propeller shaft supported by the housing and adapted to carry a propeller, a first bevel ~ear assembly comprising a f irst gear port.ion rotatable relative to the propeller shaft, a first lug portion, and means for removably securing the first lug portion to the first qear portion for common rotation therewith, a clutch dog connected to the propeller shaft for common rotation therewith and for axial movement relative thereto, and means for moving the clutch dog into and out of engagement with the first lug portion.
The invention also provides a bevel gear assembly comprising a gear portion includi.ng a hollow, generally cylindrical body portion, a bevel gear portion extending from the cylindrical body portion, a lug portion having thereon a lug, and means for securing the lug portion to the gear portion.
The invention also provides a marine propulsion device comprising a housing, a propeller shaft supported by the housing and adapted to carry a propeller, a first bevel gear assembly comprising a first gear portion rotatable relative to the propeller shaft, a first lug portion, and means for removably securing the first lug portion to the first gear portion for cornmon rotation therewith, a second bevel gear portion comprising a second gear portion rotatable relative to the propeller shaft, a second lug portion, and means for removably securing the second lug portion to the gear portion for common rotation therewlth, a clutch dog connected ~o the propeller shaft for common rotation therewith and for axial movement relative thereto, and means for selectively and $ ~
alternatively moving the clutch dog into and out of engagement with the first and second lug portions of the fir3t and second bevel gear assemblies.
A principal feature of the inven~ion is the provision of a bevel gear asse~bly which has a separate gear portion and a separate lug portion and means for securing the lug portion to the gear portion. This separate lug portion will reduce the need to replace the entire gear assembly when only the lug portion or the gear portion is damaged.
Also, a separate lug portion will permit the use of a single gear design with multiple lug 9eometries. This will reduce manufacturing costs in that it will not be necessary to produce and keep in inventory smaller quantities of nearly identical gears.
Other principal features and advantages of the invention will become apparent to those skilled in the art upon review of the following detailed description, claims and drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a side elevational view of a marine propulsion device embodying the invention.
FIG. 2 is an enlarged, vertical cross-sectional view of the shift apparatus.
FIG. 3 is an exploded prospective view of the bevel gear assembly.
Before one embodiment of the invention is explained in detail, it is to be understood that the invention is not limited in its appl:;cation to the details of construction and the arrangement of components set forth in the following 3 ~
description or illustrated in the drawings. The invention is capahle of other ~mbodiments and of being practiced or carried out in various way3. Also, it should be understood th~t the phraseology and terminology used herein is for the purpose of description and should not be regarded as limitin~.
DESCRIPTION OF THE PREFERRED EMBODIMENT
A marine propulsion device 10 embodying the invention is illustrated in FIG. 1. The marine propulsion device 10 comprises a mounting bracket or assembly 12 fixedly mounted on the transom 14 of a boat.
The marine propulsion device 10 also comprises a propulsion unit 16 mounted on the mounting assembly 12. The propulsion unit 16 includes a power head 18 which includes an internal combustion engine 20. The propulsion unît 16 further includes a lower unit 22 which supports the power head 18 and which includes a lower gearcase 24.
As shown in FIGS. 1 and 2, the marine propulsion device 10 also comprises a generally horizontal propeller shaft 26 having therein an ~ial bore 27, having thereon a propeller 28 (Fig. 1), and being rotatably mounted in the lower gearcase 24. The device 10 also comprises a drive gear 30 (Fig. 2) rotatably mounted in the lower gearcase 24. The engine 20 is drivingly connected to the drive gear 30 by a driveshaft 32.
The marine propulsion device 10 further comprises (see Fig. 2) a reversible transmission 34 for selectively effecting driving engagement between the dri~e gear 30 and the propeller shaft 26. While various suitable transmissions can be employed, in the preferred embodiment, the transmission 34 i~
located in the lower gearcase 24 and includes a pair of axially 3 ~
--s--spaced bevel gear a6semblies 36 and 38. Each of the bevel gear assemblie~ 36 and 38 is comprised of (see FIG. 3~ a gear portion 42 which is supported in surrounding relation to the propeller shaft 26 and which is rotatable relative to the propeller shaft 26. The gear portion 42 further comprises a hollow, generally cylindrical hub portion 44 which has therein a central bore 46 throuqh which the propell~r shaft 26 extends, and a tooth portion 48 which meshes with the drive gear 30 and which extends from the hub portion 44. Each gear assembly 36, 38 is also comprised of an annular lug portion 50 having thereon a plurality of lugs 52 and having a central bore 54 which is aligned with the bore 46 in the gear portion 42 and through which the propeller shaft 26 extends. Each gear asser~ly 36, 38 is further comprised of means 56 for removably securing the lug portion 50 to the gear portion 42 for cornmon rotation therewith. The means 56 for removably securing the lug portion 44 to the gear portion 42 preferably includes one or more connecting merQbers extendinq through the lug portion 50 and into threaded apertures S7 in the gear portion 42. Any suitable connecting member or members, such as bolts or screws, can be employed.
The transmission 34 al~o include~ (see Fig. 2) a clu~ch dog 58 which is splined to the propeller shaft 26 for common rotation therewith and for axial movement relative thereto.
The transmission 34 also includes means for selectively and alternatively movinq the clutch dog 58 into and out of engagement with the lugs 52 on the lug portions 50 o the gear assemblies 36 and 3~. Preferably, such mean3 includes -6~ 3 ~ ~
a selector shaft 60 which extends through the axial bore 27 in the propeller shaft 26 and which is movable axially of the propeller shaft 26. The selector shaft 60 has thereon a p.n 62 which is engageable with the clutch dog 58 for moving the clutch dog 58 with the selector shaft 60 axially of the propeller shaft 26. Thusl the selector shaft 60 is movable axially of the propeller shaft 2h for selectively and alternatively causing driving engagement between the gear assemblies 36 and 38 and the clutch dog 58 and thereby between the bevel gear assemblies 36 and 38 and the propeller shaft 26. Such a selector shaft and clutch dog arrangement is di~closed in U.S. Patent No. 3,919,964 to Hagen which iq hereby incorporated herein by reference.
The transmission 34 transmits forward driving power to the propeller shaft 26 when the clutch dog 58 is in engagement with the lugs 52 of one of the bevel gear assemblies 36 and 3~. The transmission 34 transmits reverse driving power to the propeller shaft 26 when the clutch dog 58 is in engagement with the lugs 52 of the other of the bevel gear assemblies 36 and 38. The transmission 34 is in neutral when the clutch dog 58 is between and disengaged rom both of the bevel gear assemblies 36 and 38. Thus, axial movement of the selector shaft 60 shifts the transmission 34 between forward, neutral and reverse.
Various features of the invention are set forth in the following claims.
Claims (19)
1. A marine propulsion device comprising a housing; a propeller shaft supported by said housing and adapted to carry a propeller; a first bevel gear assembly comprising a first gear portion rotatable relative to said propeller shaft, a first lug portion, and means for removably securing said first lug portion to said first gear portion for common rotation therewith; a clutch dog connected to said propeller shaft for common rotation therewith and for axial movement relative thereto; and means for moving said clutch dog into and out of engagement with said first lug portion.
2. The marine propulsion device of Claim 1 further comprising an internal combustion engine drivingly connected to said first gear portion.
3. The marine propulsion device of Claim 2 further comprising a drive shaft which is driven by said engine and which is drivingly connected to said gear portion.
4. The marine propulsion device of Claim 3 further comprising a driving gear which is driven by said drive shaft and which drivingly engages said first gear portion.
5. The marine propulsion device of Claim 1 wherein said means for removably securing said first lug portion to said first gear portion includes a connecting member extending through said first lug portion and into said first gear portion.
6. The marine propulsion device of Claim 1 wherein said means for removably securing said first lug portion to said first gear portion includes a plurality of connecting members extending through said first lug portion and into said first gear portion.
7. The marine propulsion device of Claim 1 further comprising a second bevel gear assembly.
8. The marine propulsion device of Claim 7 wherein said second bevel gear assembly comprises a second gear portion rotatable relative to said propeller shaft, a second lug portion, and means for removably securing said second lug portion to said second gear portion.
9. The marine propulsion device of Claim 8 wherein said means for moving said clutch dog into and out of engagement with said first lug portion also moves said clutch dog into and out of engagement with said second lug portion.
10. The marine propulsion device of Claim 9 wherein said clutch dog is located between said first bevel gear assembly and said second bevel gear assembly.
11. A bevel gear assembly comprising a gear portion including a hollow, generally cylindrical hub portion, and a tooth portion extending from said hub portion, a lug portion having thereon a lug, and means for securing said lug portion to said gear portion.
12. The bevel gear assembly of Claim 11 wherein said means for removably securing said lug portion to said gear portion includes a connecting member extending through said lug portion and into said gear portion.
13. The bevel gear assembly of Claim 11 wherein said means for removably securing said lug portion to said gear portion includes a plurality of connecting members extending through said lug portion and into said gear portion.
14. The bevel gear assembly of Claim 11 wherein said gear portion has therein a bore adapted to receive a propeller shaft.
15. The bevel gear assembly of Claim 14 wherein said lug portion is annular and has therein a central bore aligned with said bore in said gear portion and adapted to receive a propeller shaft.
16. A marine propulsion device comprising a housing;
a propeller shaft supported by said housing and adapted to carry a propeller; a first bevel gear assembly comprising a first gear portion rotatable relative to said propeller shaft, a first lug portion, and mean for removably securing said first lug portion to said first gear portion for common rotation therewith; a second bevel gear assembly comprising a second gear portion rotatable relative to said propeller shaft, a second lug portion, and means for removably securing said second lug portion to said second gear portion for common rotation therewith; a clutch dog connected to said propeller shaft for common rotation therewith and for axial movement relative thereto; and means for selectively and alternatively moving said clutch dog into and out of engagement with said first and second lug portions of said first and second bevel gear assemblies.
a propeller shaft supported by said housing and adapted to carry a propeller; a first bevel gear assembly comprising a first gear portion rotatable relative to said propeller shaft, a first lug portion, and mean for removably securing said first lug portion to said first gear portion for common rotation therewith; a second bevel gear assembly comprising a second gear portion rotatable relative to said propeller shaft, a second lug portion, and means for removably securing said second lug portion to said second gear portion for common rotation therewith; a clutch dog connected to said propeller shaft for common rotation therewith and for axial movement relative thereto; and means for selectively and alternatively moving said clutch dog into and out of engagement with said first and second lug portions of said first and second bevel gear assemblies.
17. The marine propulsion device of Claim 16 wherein said clutch dog is located between said first bevel gear assembly and said second bevel gear assembly.
18. The marine propulsion device of Claim 16 wherein said marine propulsion device further comprises an internal combustion engine, a drive shaft driven by said engine, and a drive gear which is driven by said drive shaft and which drivingly engages said first gear portion and said second gear portion.
19. The marine propulsion device of Claim 16 wherein said means for removably securing said first lug portion to said first gear portion and said means for removably securing said second lug portion to said second gear portion both include a plurality of connecting members extending through the associated lug portion and into the associated gear portion.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US52575790A | 1990-05-18 | 1990-05-18 | |
US525,757 | 1990-05-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
CA2040388A1 true CA2040388A1 (en) | 1991-11-19 |
Family
ID=24094485
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CA002040388A Abandoned CA2040388A1 (en) | 1990-05-18 | 1991-04-12 | Bevel gear assembly |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPH04231288A (en) |
CA (1) | CA2040388A1 (en) |
IT (1) | IT1248327B (en) |
SE (1) | SE9101428L (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013004730A (en) * | 2011-06-16 | 2013-01-07 | Japan Pionics Co Ltd | Vapor growth device |
-
1991
- 1991-04-12 CA CA002040388A patent/CA2040388A1/en not_active Abandoned
- 1991-05-13 SE SE9101428A patent/SE9101428L/en not_active Application Discontinuation
- 1991-05-17 JP JP3113378A patent/JPH04231288A/en active Pending
- 1991-05-17 IT ITRM910340A patent/IT1248327B/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
SE9101428L (en) | 1991-11-19 |
ITRM910340A1 (en) | 1992-11-17 |
SE9101428D0 (en) | 1991-05-13 |
JPH04231288A (en) | 1992-08-20 |
ITRM910340A0 (en) | 1991-05-17 |
IT1248327B (en) | 1995-01-05 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FZDE | Discontinued |