CA1087924A - Sliding plug door for railway passenger vehicle - Google Patents
Sliding plug door for railway passenger vehicleInfo
- Publication number
- CA1087924A CA1087924A CA302,811A CA302811A CA1087924A CA 1087924 A CA1087924 A CA 1087924A CA 302811 A CA302811 A CA 302811A CA 1087924 A CA1087924 A CA 1087924A
- Authority
- CA
- Canada
- Prior art keywords
- door
- rail
- wheel
- door opening
- vehicle
- 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.)
- Expired
Links
Landscapes
- Support Devices For Sliding Doors (AREA)
Abstract
Abstract of the Disclosure A railway passenger vehicle having a sliding plug door that moves to the interior of the vehicle upon opening. Upper support rails guide the door during movement and operate in conjunction with a guide rail located on the floor of the vehicle that cooperates with a door mounted roller to guide the bottom portion of the door. The lower guide roller includes a mounting spring arrangement that allows the roller to compensate for variations in the floor or variations in dimensioning between the floor and the upper guide rails to insure proper guidance of the door during opening and closing.
Description
~.~a~7~; 4 SLIDING PLUG DOOR FOR RAILWAY PASSI~NGl~R VEIIICLE
~ ~ kground of the Invention ; l. Field of the Invention This invention pertains to railway vehicles in particular to railway passenger vehicles and doorways associated therewith.
~ ~ kground of the Invention ; l. Field of the Invention This invention pertains to railway vehicles in particular to railway passenger vehicles and doorways associated therewith.
2. Description of the Prior Art , Prior art devices such as plug-type doors are adapted to open outwardly of a vehicle. Consequently, their supporting hardware is attached to the outside of the vehicle. Such an arrangement is undesirable for a passenger car because it reduces the interior width of the car that may be utilized and , also provides supporting hardware that is unsightly and hence un- ~-desirable on the exterior of contemporary, attractice railway passenger vehicles. Hinged doors which swing into a car are also undesirable because of the excessive space needed to allow ..
the door to open and close, thus eliminating space that could ~otherwise be utilized. Sliding doors are undesirable because they do not fit flush with the car side wall.
Summary of the Invention This disclosure pertains to a plug door used in a ,.
railway passenger vehicle that may be adapted to provide entrance to a baggage compartment or the like. The door supporting hard-ware is mounted on the interior of the vehicle thus permitting the door to move easily from an open and closed position into the vehicle without the need for supporting hardware located on ~i . .
i the outside of the passenger car.
~, In operation, a pair of door suppor-t rails are mounted `
adjacent the top portion of a door opening and are attached to ~,~i! 30 door hanger roller assemblies to permit the door to be pushed . inwardly and thus roll in a somewhat automatic fashion to the side of the door opening alongside the car side wall. The ~ 3 .,, . - ., - , . ~ ' . ' . ~ ,, , ,:
~OB7924 bottom portion of the door is yu:ided by a rolle~ and ~uide track that is mounted to the car floor.
It is an object oE the present invention to provide a plug-type door for railway passenger cars and also to provide the supporting hardware that will allow the door to be opened easily and move into a non-obstructing position to the side of a door opening.
It is another object of the present invention to provide door supporting rails mounted adjacent a door opening and having a cur--~ 10 ved configuration to allow the door to move into the vehicle away from the door opening and then move sideways to an out-of-the-way position in such a fashion that the door and supporting rails occupy a minimum of space within the vehicle.
Another object of the present invention is to provide a door ~; 15 suppor-ting arrangement wherein a guide roller is used in conjunct-!:., ion with a car-mounted guide track to guide the bottom portion of the door. The guide roller includes an adjustable resilient spring which insures contact between the roller and the guide track during door movement.
In one broad aspect the invention com~rehends a plug-t~pe door arrangement for a railway vehicle, which comprises a framed door opening, a door movable from a first, closed position in the door opening to a second, open position away from the door open-ing, door support means including upper rail means and lower -track means attached to the vehicle for guiding the door between closed and open positions, and means for urging the door upwardly in guided engagement with the upper rail means including wheel means in guided engagement with the lower track means. The upwardly urging means also biasing reactively between the door ~- 30 and wheel means urge the wheel means into engagement with the track means, and adjustment means adjust the limit of movement of the wheel means whereby the door is held in engagement -` between the rail and track means so as to E~cilit~te movc-ment of the door therebetween. The door support means also , ~ 2--,: . : . .
~ ,7~%4 , .
includes rail bracket means, ancl roller meang capklvely encJacJe ; the rail means and pivotally connect with the rail bracket means.
Hanger rod means depend from the rail bracket means and are pivotally attached to and supportive of the door.
These and other features and a.dvantages of the invention will become apparant to those skilled in the art from the following description, attached drawings and appended claims.
Brief Description of the Drawings FI~. 1 is a side elevation view of the railway passenger 10 car having the disclosure of this invention; .:
FIG. 2 is an enlarged view from the inside of the passenger vehicle showing the plug-type door and supporting hardwarei ~ .' ' .
.
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FIG. 3 is a view taken along lines 3-3 of ' ; , FIG. 2, appearing with,Fig. l;
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FIG. 4 is a sectional view taken generall~
along lines 4-4 of FIG. 2, ~,' 5 FIG. 5 is a sectional view taken generally along lines 5-5 of FIG. 2;
.
, FIG. 6 is a sectional view taken generally along-lines 6-6 of FIG. 2;
FIG'.~ is ;a;view;taken~generally along lines ., ' 10 7-7 of FIG. 5; , , , FIG. 8 is a view taken generally along lines , 8-8 of FIG. 6 , . l FIG. 9 is an enlarged and removed view of the door supporting-roller-arrangementi appearing with'Figs. 4 and 10;~
:1 15 and - ;.
,',; `~ , FIG.,10 is an enlarged view of the ,door track ,.
~,;' arrangement located at the bottom of the plug-type door, appearing with Figs. 4 and 9.
' Descri~tion of the Preferred Embodiment Referring now to the drawings, and in ~ ' particular to FIG. 1, there is shown a railway passenger vehicle :'i ; .
~, 10 having the usual pairs of supporting trucks shown schematically `, at 12. In this particular vehicle it is contemplated that there will be provided an upper, passenger level 14 with 25 associated end doorways 16 to permit passenger movement between adjacent cars. The lower level may be utilized for baggage and equipment such as heating and cooling components.
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To pr~vide entrance and exit to the vehicle, a conventional slide door 18 of the type that slides into the wall section or, alternatively, doors of a one piece hinged ,- construction may be utilized.' . :
As shown in FIG. 1, the car may include the ,, usual air intake ~rills 20 for heating, ventilating and air conditioning purposes and also includes equipment access doors ~ 22 for servicing or inspection of mechani'cal and electFical equipment and the like. ~ , ;: ' ' 10 ~ Thel~lower~compartment---of the car-is used,fb~
'~ storage of passenger baggage. Access to the'baggage : .
, compartment is provided by the-sliding plug door 24.
,,, , ~
As shown in FIG. 2, a aoor opening is defined by .. . .
,- 15 top frame members 26 and spaced sidé or plug frame members 27.
'~ Not shown-in 'the'illustrations are suitable ~gaskets-'to'be --fitted within-the door frame or carried by the door-24 to ' - ~ insure an air and water-tight seal between the door and ~,~ associated car framing members 26,27.
~,~ 20 As shown in FIGS. 2 and 3, a pair of support ':.
' rails 28 and 30 are mounted to the top portion of the door framing with the use of a flange 32 which may be welded or~
' otherwise securely attached to the door frame. The end ' ' r portion of each rail is supported away from the vehicle siae ~ 25 wall by a suitably located rail bracket 33 (FIG. 2). Support ,~' rails 28 and 30 have a curved portion adjacent the door open-~; ing that allows the door to move,initially inwardly of thé
~, vehicle before moving laterally of the door opening. Support `, , .
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rails 28 and 30 al60 have straight portions extending from the curved portions in order that the door may move along ana generally parallel to the side wall a~er it has moved clear of the door opening.
As shown in FIGS. 2 and 5, the door 24 is attached to the associated support rails 28, 30 by hangers 34.
Each hanger 34 includes pairs of upper rollers 35 and lower rollers 36 which are positioned about the associated support rail in such a fashion as to efficiently guide the door along 10 .-.:. its~-s~p~rt.rai-l~ A hanger-rod--38 is attached-~o-and-exten~s,., aownward~ ro~ the hanger--34 and~als.o attached'to an upperiz.,:~ :
, door bracket 40 to complete a connection between the door 24 and the hanger 34 :~ Similarly the l.ower.portion of door~.24 is . ' ~, 15 guided into and from the.closed position shown in FIGS. 1,2 ::
and--5. As..shown~ -n FIGS..:2, 6 a-nd,-8, one-l.ower-~corner of--the=.-~ door is also adapted for guided movement away from the door ,. .
,~ opening and alongside the car wall. A guide track 42 is ;~
"` posltioned adjacent the door threshold 44 and has the same .' ,.
, 20 curvature as the support rail 3~ located vertically above it. ,~
.:' Track 44 may have an L-shaped configuration as shown in the ':
drawings or may have another convenient shape which provides '.' .
an upstanding or other section for guiding door 24. Guide wheels 45 are located on each side of a track contact wheel ~.
. 25 46 ana positioned about the upstanding portion of the guide '' track 42 to guide the lower portion of the door during opening ' ' ; and closing movements. As shown in FIG. 10, guide wheel portions ' .~.
~, 45 prevent a track contact wheel portion 46 from disengaging from the upstanaing portion of guide track 42.
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A clevis 47 is pinned to the wheel portions 45, 46 and also integrally connected with upwardly extending guide pin 48 in order that guide wheel portions 45 remain in guiaing position alongside guide track 42.
': . ' As shown in FIGS. 6 and 8, guide pin 48 has a coil spring 50 positioned thereabout an~ held in place at one end by stop washer 51.which is integrally attached by welding or other suitable means to guide pin 48. The :
' upper end of spring 50 is held in position by a door bracket lO-,,; 52 whi-ah holds.the_spri.ng-50:and has..an opening.through..-which... .guide.;pi~.4.8 eXtends..~ A pair of adjustment,nuts:53 are--~
positioned atop bracket 52 and may vary the tension in . spring 50.
', :, ~ Thus, in operati-on-it can be observed and noted .,lS that as door 24 is urged inwardly-of the vehicle lO it will ., initially. move inwardly away,from the door opening and -then ~ laterally to clear the door framing. After the door ,. . ..
framing has been cleared door 24 moves alongside the side wall . unit and in proximity with side wall in such a fashion as to take up as little space as possible within the baggage com-~ partment.
,~. The foregoing description and drawings merely ;~
,, explain and illustrate the invention and the invention ~ ~, is not limited thereto, except insofar as the appenaed claims ,'~ 25 are so limited, as those who are skilled in the art and '~ have the disclosure before them will be able to make ;', modifications and variations therein wit'nout departing from the scope of the invention.
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the door to open and close, thus eliminating space that could ~otherwise be utilized. Sliding doors are undesirable because they do not fit flush with the car side wall.
Summary of the Invention This disclosure pertains to a plug door used in a ,.
railway passenger vehicle that may be adapted to provide entrance to a baggage compartment or the like. The door supporting hard-ware is mounted on the interior of the vehicle thus permitting the door to move easily from an open and closed position into the vehicle without the need for supporting hardware located on ~i . .
i the outside of the passenger car.
~, In operation, a pair of door suppor-t rails are mounted `
adjacent the top portion of a door opening and are attached to ~,~i! 30 door hanger roller assemblies to permit the door to be pushed . inwardly and thus roll in a somewhat automatic fashion to the side of the door opening alongside the car side wall. The ~ 3 .,, . - ., - , . ~ ' . ' . ~ ,, , ,:
~OB7924 bottom portion of the door is yu:ided by a rolle~ and ~uide track that is mounted to the car floor.
It is an object oE the present invention to provide a plug-type door for railway passenger cars and also to provide the supporting hardware that will allow the door to be opened easily and move into a non-obstructing position to the side of a door opening.
It is another object of the present invention to provide door supporting rails mounted adjacent a door opening and having a cur--~ 10 ved configuration to allow the door to move into the vehicle away from the door opening and then move sideways to an out-of-the-way position in such a fashion that the door and supporting rails occupy a minimum of space within the vehicle.
Another object of the present invention is to provide a door ~; 15 suppor-ting arrangement wherein a guide roller is used in conjunct-!:., ion with a car-mounted guide track to guide the bottom portion of the door. The guide roller includes an adjustable resilient spring which insures contact between the roller and the guide track during door movement.
In one broad aspect the invention com~rehends a plug-t~pe door arrangement for a railway vehicle, which comprises a framed door opening, a door movable from a first, closed position in the door opening to a second, open position away from the door open-ing, door support means including upper rail means and lower -track means attached to the vehicle for guiding the door between closed and open positions, and means for urging the door upwardly in guided engagement with the upper rail means including wheel means in guided engagement with the lower track means. The upwardly urging means also biasing reactively between the door ~- 30 and wheel means urge the wheel means into engagement with the track means, and adjustment means adjust the limit of movement of the wheel means whereby the door is held in engagement -` between the rail and track means so as to E~cilit~te movc-ment of the door therebetween. The door support means also , ~ 2--,: . : . .
~ ,7~%4 , .
includes rail bracket means, ancl roller meang capklvely encJacJe ; the rail means and pivotally connect with the rail bracket means.
Hanger rod means depend from the rail bracket means and are pivotally attached to and supportive of the door.
These and other features and a.dvantages of the invention will become apparant to those skilled in the art from the following description, attached drawings and appended claims.
Brief Description of the Drawings FI~. 1 is a side elevation view of the railway passenger 10 car having the disclosure of this invention; .:
FIG. 2 is an enlarged view from the inside of the passenger vehicle showing the plug-type door and supporting hardwarei ~ .' ' .
.
: .
, .
. . .
, ~ .
i : .
.
~t .~' ' . , ~
":'. ' ' .,. ~
r~, ~ .
.
.. . .
7~7Z~
FIG. 3 is a view taken along lines 3-3 of ' ; , FIG. 2, appearing with,Fig. l;
- . !
FIG. 4 is a sectional view taken generall~
along lines 4-4 of FIG. 2, ~,' 5 FIG. 5 is a sectional view taken generally along lines 5-5 of FIG. 2;
.
, FIG. 6 is a sectional view taken generally along-lines 6-6 of FIG. 2;
FIG'.~ is ;a;view;taken~generally along lines ., ' 10 7-7 of FIG. 5; , , , FIG. 8 is a view taken generally along lines , 8-8 of FIG. 6 , . l FIG. 9 is an enlarged and removed view of the door supporting-roller-arrangementi appearing with'Figs. 4 and 10;~
:1 15 and - ;.
,',; `~ , FIG.,10 is an enlarged view of the ,door track ,.
~,;' arrangement located at the bottom of the plug-type door, appearing with Figs. 4 and 9.
' Descri~tion of the Preferred Embodiment Referring now to the drawings, and in ~ ' particular to FIG. 1, there is shown a railway passenger vehicle :'i ; .
~, 10 having the usual pairs of supporting trucks shown schematically `, at 12. In this particular vehicle it is contemplated that there will be provided an upper, passenger level 14 with 25 associated end doorways 16 to permit passenger movement between adjacent cars. The lower level may be utilized for baggage and equipment such as heating and cooling components.
: . ; ' ,.
. . ~ ., . , :, ; . , :
, ~-, ,. : :
9z~
To pr~vide entrance and exit to the vehicle, a conventional slide door 18 of the type that slides into the wall section or, alternatively, doors of a one piece hinged ,- construction may be utilized.' . :
As shown in FIG. 1, the car may include the ,, usual air intake ~rills 20 for heating, ventilating and air conditioning purposes and also includes equipment access doors ~ 22 for servicing or inspection of mechani'cal and electFical equipment and the like. ~ , ;: ' ' 10 ~ Thel~lower~compartment---of the car-is used,fb~
'~ storage of passenger baggage. Access to the'baggage : .
, compartment is provided by the-sliding plug door 24.
,,, , ~
As shown in FIG. 2, a aoor opening is defined by .. . .
,- 15 top frame members 26 and spaced sidé or plug frame members 27.
'~ Not shown-in 'the'illustrations are suitable ~gaskets-'to'be --fitted within-the door frame or carried by the door-24 to ' - ~ insure an air and water-tight seal between the door and ~,~ associated car framing members 26,27.
~,~ 20 As shown in FIGS. 2 and 3, a pair of support ':.
' rails 28 and 30 are mounted to the top portion of the door framing with the use of a flange 32 which may be welded or~
' otherwise securely attached to the door frame. The end ' ' r portion of each rail is supported away from the vehicle siae ~ 25 wall by a suitably located rail bracket 33 (FIG. 2). Support ,~' rails 28 and 30 have a curved portion adjacent the door open-~; ing that allows the door to move,initially inwardly of thé
~, vehicle before moving laterally of the door opening. Support `, , .
.`.,` ' .
.;,. . .
~ 5-.; . .
:
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rails 28 and 30 al60 have straight portions extending from the curved portions in order that the door may move along ana generally parallel to the side wall a~er it has moved clear of the door opening.
As shown in FIGS. 2 and 5, the door 24 is attached to the associated support rails 28, 30 by hangers 34.
Each hanger 34 includes pairs of upper rollers 35 and lower rollers 36 which are positioned about the associated support rail in such a fashion as to efficiently guide the door along 10 .-.:. its~-s~p~rt.rai-l~ A hanger-rod--38 is attached-~o-and-exten~s,., aownward~ ro~ the hanger--34 and~als.o attached'to an upperiz.,:~ :
, door bracket 40 to complete a connection between the door 24 and the hanger 34 :~ Similarly the l.ower.portion of door~.24 is . ' ~, 15 guided into and from the.closed position shown in FIGS. 1,2 ::
and--5. As..shown~ -n FIGS..:2, 6 a-nd,-8, one-l.ower-~corner of--the=.-~ door is also adapted for guided movement away from the door ,. .
,~ opening and alongside the car wall. A guide track 42 is ;~
"` posltioned adjacent the door threshold 44 and has the same .' ,.
, 20 curvature as the support rail 3~ located vertically above it. ,~
.:' Track 44 may have an L-shaped configuration as shown in the ':
drawings or may have another convenient shape which provides '.' .
an upstanding or other section for guiding door 24. Guide wheels 45 are located on each side of a track contact wheel ~.
. 25 46 ana positioned about the upstanding portion of the guide '' track 42 to guide the lower portion of the door during opening ' ' ; and closing movements. As shown in FIG. 10, guide wheel portions ' .~.
~, 45 prevent a track contact wheel portion 46 from disengaging from the upstanaing portion of guide track 42.
~, .. --6--.
., ~ .
:
... ~.. ; . :: . . , . .- . .
. . .
... .
A clevis 47 is pinned to the wheel portions 45, 46 and also integrally connected with upwardly extending guide pin 48 in order that guide wheel portions 45 remain in guiaing position alongside guide track 42.
': . ' As shown in FIGS. 6 and 8, guide pin 48 has a coil spring 50 positioned thereabout an~ held in place at one end by stop washer 51.which is integrally attached by welding or other suitable means to guide pin 48. The :
' upper end of spring 50 is held in position by a door bracket lO-,,; 52 whi-ah holds.the_spri.ng-50:and has..an opening.through..-which... .guide.;pi~.4.8 eXtends..~ A pair of adjustment,nuts:53 are--~
positioned atop bracket 52 and may vary the tension in . spring 50.
', :, ~ Thus, in operati-on-it can be observed and noted .,lS that as door 24 is urged inwardly-of the vehicle lO it will ., initially. move inwardly away,from the door opening and -then ~ laterally to clear the door framing. After the door ,. . ..
framing has been cleared door 24 moves alongside the side wall . unit and in proximity with side wall in such a fashion as to take up as little space as possible within the baggage com-~ partment.
,~. The foregoing description and drawings merely ;~
,, explain and illustrate the invention and the invention ~ ~, is not limited thereto, except insofar as the appenaed claims ,'~ 25 are so limited, as those who are skilled in the art and '~ have the disclosure before them will be able to make ;', modifications and variations therein wit'nout departing from the scope of the invention.
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~ ' .
; ' , . , ~" , .
Claims (7)
1. A plug-type door arrangement for a railway vehicle comprising:
a framed door opening;
a door movable from a first, closed position in the door opening to a second, open position away from the door opening;
door support means including upper rail means and lower track means attached to said vehicle for guiding the door between closed and open positions, said door support means also including rail bracket means, roller means captively engaging said rail means and pivotally connected with said rail bracket means, and hanger rod means depending from said rail bracket means pivotally attached to and supportive of said door, and means for urging the door upwardly in guided engagement with said upper rail means including wheel means in guided engagement with said lower track means, said upwardly urging means also biasing reactively between said door and wheel means for urging said wheel means into engagement with said track means, and adjustment means for adjusting the limit of movement of said wheel means whereby said door is held in engagement between said rail and track means so as to facilitate movement of said door therebetween.
2. The invention in accordance with Claim 1, wherein said means for urging the door upwardly comprises:
clevis means pivotally supporting said wheel means,
a framed door opening;
a door movable from a first, closed position in the door opening to a second, open position away from the door opening;
door support means including upper rail means and lower track means attached to said vehicle for guiding the door between closed and open positions, said door support means also including rail bracket means, roller means captively engaging said rail means and pivotally connected with said rail bracket means, and hanger rod means depending from said rail bracket means pivotally attached to and supportive of said door, and means for urging the door upwardly in guided engagement with said upper rail means including wheel means in guided engagement with said lower track means, said upwardly urging means also biasing reactively between said door and wheel means for urging said wheel means into engagement with said track means, and adjustment means for adjusting the limit of movement of said wheel means whereby said door is held in engagement between said rail and track means so as to facilitate movement of said door therebetween.
2. The invention in accordance with Claim 1, wherein said means for urging the door upwardly comprises:
clevis means pivotally supporting said wheel means,
Claim 2 - cont'd ....
threaded pin means affixed to said clevis means and extending upwardly therefrom through bracket means affixed to said door, said biasing means captively retained by and reactive between said bracket means and said pin means for urging said wheel means downwardly into engagement with said track means, and threaded adjusting means mounted on said pin means and reactive against said bracket means for adjustably limit-ing downward travel of said wheel means.
threaded pin means affixed to said clevis means and extending upwardly therefrom through bracket means affixed to said door, said biasing means captively retained by and reactive between said bracket means and said pin means for urging said wheel means downwardly into engagement with said track means, and threaded adjusting means mounted on said pin means and reactive against said bracket means for adjustably limit-ing downward travel of said wheel means.
3. The invention in accordance with Claim 2, wherein said biasing means comprise coil spring means disposed about said pin means.
4. The invention in accordance with Claim 1 wherein said rail bracket means comprise a pair of rail brackets and said hanger means comprise a hanger rod depending from each of said rail brackets, said hanger rods pivotally attached to said door at longitudinally opposite ends thereof.
5. The invention in accordance with Claim 4, wherein said hanger rods pivotally engage a pair of hanger brackets affixed to said door.
6. The invention in accordance with Claim 1, wherein said rail means include a first rail with one end attached at one side of said door opening, a second rail with one end attached at the other side of said door opening, said first and second rail each having a first contour portion adjacent said door opening for moving said door generally inwardly of said vehicle and out of said door opening, and
6. The invention in accordance with Claim 1, wherein said rail means include a first rail with one end attached at one side of said door opening, a second rail with one end attached at the other side of said door opening, said first and second rail each having a first contour portion adjacent said door opening for moving said door generally inwardly of said vehicle and out of said door opening, and
Claim 6 - cont' d ...
said first and second rail each having a second portion for moving said door longitudinally relative to said door opening.
said first and second rail each having a second portion for moving said door longitudinally relative to said door opening.
7. The invention in accordance with Claim 6, and said track means corresponding in dimension and contour to each of said rails for guiding and supporting said door.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US86565377A | 1977-12-29 | 1977-12-29 | |
| US865,653 | 1977-12-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1087924A true CA1087924A (en) | 1980-10-21 |
Family
ID=25345965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA302,811A Expired CA1087924A (en) | 1977-12-29 | 1978-05-08 | Sliding plug door for railway passenger vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1087924A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303618A (en) * | 2011-06-13 | 2012-01-04 | 南京康尼机电股份有限公司 | Built-in plug door device for rail vehicle |
-
1978
- 1978-05-08 CA CA302,811A patent/CA1087924A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102303618A (en) * | 2011-06-13 | 2012-01-04 | 南京康尼机电股份有限公司 | Built-in plug door device for rail vehicle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |