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Publication numberUS3478700 A
Publication typeGrant
Publication dateNov 18, 1969
Filing dateFeb 28, 1968
Priority dateDec 5, 1966
Publication numberUS 3478700 A, US 3478700A, US-A-3478700, US3478700 A, US3478700A
InventorsBreen Henry D, Loomis Russell M, Lundvall John S
Original AssigneeUnarco Industries
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Floor latch strip for railway cars
US 3478700 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Nov. 18, 1969 J. s. LUNDVALL ETAL 3,478,700

FLOOR LATCH STRIP FOR RAILWAY CARS Filed Feb. 28, 1968 2 Sheets-Sheet l fn z/enfors ejb/772 Q9, unaZZ/QIZZ Bz/SseZZ r Loo/rus @672743 ND. Breen )62W //Leewm/m 9# an M yS.

NOV 18, 1969 J. s. LUNDVALL ETAL 3,478,700

FLOOR LATCH STRIP FOR RAILWAY CARS 2 sheets-sheet a Filed Feb. 28. 1968 5 s Us w ai Jmvmnw/w C de M nu .w .E UE [/W-mw bw UA?? im da@ A@ ,www

United States Patent O 3,478,700 FLOOR LATCH STRIP FOR RAILWAY CARS John S. Lundvall, Park Ridge, Russell M. Loomis, Palos Heights, and Henry D. Breen, Chicago, Ill., assignors to Unarco Industries, Inc., a corporation of Illinois Continuation-impart of application Ser. No. 599,296, Dec; 5, 1966. This application Feb. 28, 1968, Ser. No. 708,957

Int. Cl. B61d 17/10, 45/00 U.S. Cl. 10S-369 5 Claims ABSTRACT OF THE DISCLOSURE BACKGROUND OF THE INVENTION This application is a continuation-in-part of our copending application, Ser. No. 599,296, led Dec. 5, 1966, now patent No. 3,422,773, entitled Floor Latch Strip for Railway Cars.

This invention relates to a floor latch strip for railway cars, and more particularly to a sanitary floor latch strip which can easily be cleaned.

'In railways cars equipped with lading separators it is customary to secure the lading separators or door-like bulkheads in place by latching pins extending from the upper and lower edges thereof and engaging openings in latching strips or tracks in the car. Floor-mounted latch strips tend to collect dirt and become unsanitary so that ordinary, apertured strips of conventional construction that have heretofore been used cannot or should not properly be used in cars intended for use in transporting food of various types and similar materials.

It is accordingly one of the objects of the present invention to provide a oor latch strip which can more easily be cleaned to maintain it in sanitary condition.

Another object is to provide a oor latch strip that is so formed that the locking recesses thereof are more open at all times so that they can more easily be cleaned.

The above and other objects and advantages of the invention will be more readily apparent from the following description when read in connection with the accompanying drawing.

BRIEF DESCRIPTION OF THE DRAWING FIG. l is a transverse perspective view of a railway car embodying the invention;

FIG. 2 is an enlarged, fragmentary sectional view showing latch pins of a lading separator engaged in one form of floor latch strip embodying this invention;

FIG. 3 is a cross-sectional view taken substantially on the line 3-3 of FIG. 2 and showing certain typical environmental portions of the` construction of a freight-carrying vehicle;

FIG. 4 is a fragmentary top plan view taken substantially on the line 4-4 of FIG. 2;

FIG. 5 is a fragmentary top plan view of another form of floor latch strip embodying the invention;

FIG. 6 is a cross-sectional view taken substantially on the line 6 6 of FIG. 5;

FIG. 7 is a fragmentary top plan view of still another form of oor latch strip embodying the invention; and

"ice y FIG. 8 is a cross-sectional View taken substantially on the line 8-8 of FIG. 7.

DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, the improved floor latch strip embodying the invention is to be incorporated in a conventional freight-carrying vehicle, such as a railway car C that includes spaced sides 10, -a roof 11 and a structural floor serving as sub-floor 12. The sub-floor 12 is typically covered by a load-supporting deck 12a made up of planks 13 or the like that are secured to sub-floor in any desired manner well known in the art.

The railway car C is adapted to have mounted therein one or more upright lading separators, which is a doorlike body or bulkhead for dividing the interior of the car into compartments. Such lading separators may typically be of the general type as shown in U.S. Patent No. 3,168,055. In FIGS. 2 and 3, the lading separator is indicated as 14.

In FIG. 1, the car C is equipped with means for suspending the separator within the car and such means are shown as tracks 15 mounted on the said side walls 10 adjacent the junctions of the side walls 10 and roof 11. The tracks Amay be formed in their horizontal lower flanges with latching openings 16 adapted to receive therein latch pins carried by the bulkhead 14. The bulkhead 14 carries thereon l-atching bars 14a which may be selectively thrust outwardly or withdrawn, depending upon whether the bulkhead 14 is to be latched in position in the car. A portion of a typical latch bar 14a is shown in FIGS. 2 and 3 and has thereon multiple latch teeth 14b for cooperation with a latching strip 17 carried in a longitudinal recess 17a defined in the floor of the car. What has thus far been described, except for the details of latching strip 17, is well known in the art and forms no part of this invention but sets forth the environment for the invention hereinafter described.

The one for-m of floor latch-strip 17 shown in FIGS. 2-4 includes a channel-shaped body 20 having spaced upright legs 22 joined at their lower ends by a bight or web means 24 and connected at their upper ends to outwardly extending flanges 26a and 26b. The width of the channelshaped body 20 is such as to enter into a longitudinal recess 17a defined in the deck 12a. The upper edges of deck 12a -adjacent the recess 17a is recessed at 28a and 28b to respectively receive therein the flanges 26a and 2Gb, so that the upper surfaces of said ilanges are substantially flush with the upper surface of the deck 12a. The web means 24 of the body 20 is provided with longitudinally spaced apertures 30 therein adapted for cooperation with a hold-down means hereinafter described.

Extending longitudinally along the axis or center of the channel-shaped body 20 is a dentated strip means 32 made up of elongated strip segments 32 which may conveniently be forged to the general shape indicated and providing thereon fiat side walls 32a and 32b. The bottom edge of each strip 32 is machined to achieve a good fit against the bight 24 of the channel. Each dentated strip 32 denes alternate upstanding teeth 34 and spaces 36 with a tooth 34 at each end of each strip 32. Each tooth 34 has a pair of spaced, parallel side surfaces 34a and 34b, and a top surface 34e which is disposed substantially in the horizontal plane through the upper end of body 20. Each space 36 is bounded at its longitudinal ends by spaced surfaces 34a and 34b of adjacent teeth, and has a bottom surface 36a.

The spacing of side 32a from its facing upright leg 22 defines a channel 38 that is elongated and extends longitudinally of the body 20 and is open-topped. A similar channel 39 is defined between the side 32b of strip 32 and its facing upright leg 22. As best seen in FIGS. 2

and 4, the adjacent ends of two strips 32 are spaced apart so as to provide a space 40 that is of the same length as a space 36 defined on the dentate strip 32.

Each aperture 30 may be located in vertical alignment with a space 40, and a bolt means 42 is provided tying down the longitudinal body on the sub-hoor 12. The bolt means may be of any type, such as a through bolt as shown in FIGS. 7 and 8, or may be of an expansion bolt type for blind connection as in FIGS. 2 and 3, wherein the sub-floor is provided with a bottomed bore 42a, and a headed bolt 42h with tool-receiving socket therein is used with an expandable means in bore 42a for securement to the sub-oor 12. Expansion bolts of the type generally suggested herein are well known in the art, and their details need no further description.

From the -construction thus far disclosed, it will be understood that the arrangement of parts provides in channel-body 20 two continuous opentopped longitudinal channels 38 and 39 through which cleaning of the elongated body 20 may be eifected either by sweeping through such channels, or by jet fluid means which would be directed into the channels to eject waste from such channels. The arrangement of the dentated strips 32 within the body 20 also provides a series of spaced open-topped transverse recesses 36 which are at least partially bounded by spaced abutments 34, and which have a width which bridges or spans the space between the open-topped channels 38 and 39. These spaces 36 are adapted to receive therein the teeth 14b of the latch bars 14a as can best be seen in FIGS 2-4. Thus, the transverse recesses 36 are laterally otset from the vertical planes of the opentopped channels 38 and 39, but nevertheless, such spaces 36 communicate with an adjacent open-topped channel so that waste that may become located in the transverse recesses 36 may be preliminarily moved transversely into an open-topped channel for subsequent removal from the channel. By locating the lower wall 36a of each transverse channel 36 above the lowermost wall 24 of an opentopped longitudinal channel, such as 38, the waste in the transverse channels 36 is being caused to gravitate toward the longitudinal channel 38, from whence a cleaning of the longitudinal channel may be conveniently accomplished.

While in the form of device of FIGS. 24 the apertures for cooperation with hold-down means 42 are shown located axially aligned between two dentate strips 32, it will be appreciated that for convenience of access to the headed bolt 42b, it may be desirable to oiset the apertures 30 to a position in the vertical plane of one or the other, or both, of the longitudinal channels 38 and 39. When apertures 30 are laterally offset from strips 32, in order to balance the hold-down forces, bores 30 length- Wise of body 20 may be provided alternately in the vertical planes of the two channels 38 and 39. While the body 20 is shown to be integrally formed, it will be appreciated that the shape of body 20 may also be formed `by two Z-shaped sections which may then be welded along the length of their lowermost legs together, or to the underside of the dentate strips 32. In providing a body 20 formed by two Z-shaped parts, one Z would include the ange 26a, its adjacent upright leg 22 and substantially one-half of what constitutes web means 24, while the other Z-shaped part would include liange 26b, its associate upright leg 24 and the remaining half of web means 24.

In a second form of construction as shown in FIGS. 5 and 6, the Hoor-latch strip, generally indicated at 50, is formed of sheet metal and provides a channel-shaped body 52 having spaced upright legs 54 that have at their lower ends an interconnecting bight or web means 56, and which have inwardly directed flange means 58 at their upper ends. The web means 56 has apertures 60 therein spaced longitudinally of body 52 for receiving therethrough the shank of a bolt-like, hold-down means 62. The inwardly turned ange means 58 at the upper ends of each leg 54 delines therein alternate teeth 64 and spaces 66. Each tooth 64 has a portion lying in the horizontal plane at the uppermost end of body 52 and has parallel edges 64a and 64b which serve as abutments for engagement with a tooth 14b of a latch bar 14a carried by a lading separator 14. The inturned terminus 64C of a tooth 64 is spaced from another tooth 64 to dene a centrally located, open-topped, longitudinal channel 68 through which cleaning of the channel body 52 may be effected. The edges 64a and 64b of teeth 64 cooperate with the inner surface of adjacent upright leg 54 to define the space 66 which communicates with, but is laterally offset outwardly from the vertical plane of the opentopped channel 68, and which is arranged to receive therein a portion of tooth 14b.

In the form of floor-latch strip shown in FIGS. 7 and 8, there is a combination of certain features found in each of the two earlier described forms. The lading separator is again indicated at 14 and includes a latch bar 14a having downwardly extending spaced latch teeth 14b which vare best seen in cross-section in FIG. 7. The boxcars floor 12 and decking 12a are illustrated in FIG. 8, and a longitudinal recess 17a for the latch strip is shown. In FIGS. 7 and 8 the channel-shaped body is generally indicated at 70 and is shaped to provide spaced upright legs 72 which are non-planar. The lower ends of upright legs 72 connect to, or merge with, a bight or web means 74 that is shaped to include two downwardly and inwardly inclined, longitudinal, segments 74a and a lowermost central longitudinal segment 74b. The upper end of each leg 72 has an outwardly extending flange 76. The central segment 74b of web means 74 is provided with longitudinally spaced apertures 78 for cooperation with the shank of a hold-down bolt means 80. The holddown bolt means 80 in this instance is shown of the through type with a cooperating nut 80a and lock washer 80h as is well known in such constructions.

In this particular form of hoor-latch strip, the upright legs 72 of the channel-shaped body are formed with a sinuate inner periphery which is best seen in FIG. 7, and which is shaped to define alternate inwardly-extending teeth 82 and latch-tooth receiving spaces 84. Each tooth 82 has spaced apart transverse edges 82a and 82h and an innermost edge 82C which is spaced from a corresponding tooth 82 on the opposite leg 72 of the channel-shaped body, so that there is formed between said inwardly extending teeth 82 a continuous, open-topped, longitudinal channel 86 through which cleaning of the body 70 may be effected. Each of the spaces 84 is an open-topped transverse recess that extends transversely outwardly of channel 86 and that is at least partially bounded by the abutment walls 82a and 82b on the teeth 82. Each recess 84 is adapted to receive therein a portion of a tooth 14b of a latching bar 14a. Although the transverse recesses 84 are laterally offset from the vertical plane of the open-topped channel 86, nevertheless they all communicate with the open-topped channel 86 so that any waste which enters the transverse recesses 84 may preliminarily move laterally into the open-topped channel 86 for subsequent removal. To facilitate such preliminary movement of waste, the inclined web segments 74a which are at least in part above web segment 74b and which bound the lower end of each transverse recess 84 operate to cause such waste to gravitate toward the lowermost web section ,74b which bounds the lower end of opentopped channel 86.

While there has been shown and described a particular embodiment of this invention, it Will be obvious to those skilled'in the art that various changes and modilications may be made therein Without departing from the invention and, therefore, it is intended in the appended claims to cover all such changes and modications as fall Within the true spirit and scope of the invention.

What we claim as new and desire to secure by Letters Patent of the United States is:

1. A door latch strip for use in a freight-carrying vehicle that is equipped with a lading separator carrying downwardly projecting latch elements, said oor latch strip comprising an -elongated body with an integral bottom and spaced side walls above the bottom for conning waste in said body and having uppermost portions located in a substantially horizontal plane, and means secured to said bottom and spaced between said side Walls to define two spaced, continuous, open-topped, longitudinal channels for receiving and holding therein waste which enters the body and only along which cleaning of the body is to be effected, said means on said bottom comprising between said open-topped channels a series of longitudinally spaced, open-topped, transverse recesses at least partially bounded by spaced abutments extending transverse to the length of the open-topped channels and adapted to receive therein the latch elements carried by a lading separator, said transverse recesses being located between the vertical planes of said open-topped longitudinal channels and communicating with both said open topped channels, the transverse recesses including topped transverse recesses is in an elongated member having parallel longitudinal sides and with one longitudinal edge thereof engaging the bottom of the channel, said elongated member being spaced from both legs of the channel and having the transverse recesses defined in the 'other longitudinal edge thereof.

4. A device as in claim 1 including spaced bolt means located only in the region between the two spaced opentopped, longitudinal channels and extending downwardly through the bottom of the elongated body for attaching the elongated body to the oor of a freight-carrying 5. A device as in claim 1 wherein the elongated body is channel shaped, with the side walls extending upa lower wall spaced above said bottom so that waste in said transverse recesses may be preliminarily moved into and held in the open-topped channels for subsequent removal.

2. A device as in claim 1 wherein the elongated body has an outwardly extending longitudinal flange at the uppermost portion of and integral with each side wall and adapted to seat on the door of a freight-carrying vehicle.

3. A device as in claim 1 wherein the elongated body is channel shaped, with the legs of the channel providing the side walls extending upwardly from the bottom of the channel and the means defining the spaced openwardly from the bottom, an outwardly extending longitudinal flange at the uppermost edge of at least vone of the side walls of the channel, said ange being adapted to seat on the floor of a freight-carrying vehicle.

References Cited UNITED STATES PATENTS 2,122,950 7/1938 Reifer 105-369 2,390,873 12/ 1945 Ditchfield 105-376 2,891,490 6/1959 Elsner 105-369 3,205,834 9/1965 Terlecky 105-368 DRAYTON E. HOFFMAN, Primary Examiner U.S. Cl. X.R. --376

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2122950 *Mar 25, 1937Jul 5, 1938Gen Motors CorpFreight car loading apparatus
US2390873 *Jun 23, 1943Dec 11, 1945Youngstown Steel Door CoFreight car
US2891490 *Feb 28, 1955Jun 23, 1959Aeroquip CorpCargo rail tie-down
US3205834 *Sep 28, 1961Sep 14, 1965Acf Ind IncCargo tie-down
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3802355 *Feb 28, 1973Apr 9, 1974Gen Am TransportFloor latch strip for railway cars
US3837296 *Apr 5, 1972Sep 24, 1974Unarco IndustriesSafety latch pin for bulkheads
US3865049 *May 11, 1973Feb 11, 1975Stanray CorpFloor latch strip for railway cars
US4208970 *Dec 19, 1977Jun 24, 1980Evans Products CompanyMovable lading bracing stanchions for freight cars
US7014487 *Nov 3, 2004Mar 21, 2006Fujitsu LimitedConnector capable of preventing abrasion
USRE30388 *May 17, 1978Sep 2, 1980Pullman IncorporatedRailroad car with depressed floor
U.S. Classification410/152
International ClassificationB61D45/00
Cooperative ClassificationB61D45/001
European ClassificationB61D45/00B
Legal Events
Feb 7, 1985ASAssignment
Effective date: 19850116