US3491899A - Fluid-operated uncoupling mechanism - Google Patents
Fluid-operated uncoupling mechanism Download PDFInfo
- Publication number
- US3491899A US3491899A US663660A US3491899DA US3491899A US 3491899 A US3491899 A US 3491899A US 663660 A US663660 A US 663660A US 3491899D A US3491899D A US 3491899DA US 3491899 A US3491899 A US 3491899A
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- US
- United States
- Prior art keywords
- uncoupling
- fluid
- coupler
- connector
- operated
- 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 - Lifetime
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B61—RAILWAYS
- B61G—COUPLINGS; DRAUGHT AND BUFFING APPLIANCES
- B61G5/00—Couplings for special purposes not otherwise provided for
- B61G5/06—Couplings for special purposes not otherwise provided for for, or combined with, couplings or connectors for fluid conduits or electric cables
- B61G5/08—Couplings for special purposes not otherwise provided for for, or combined with, couplings or connectors for fluid conduits or electric cables for fluid conduits
Definitions
- FIG. 1 A first figure.
- a pivoted knuckle on the head in coupling is automatically swung closed and locked in closed position by a gravity lock in the head and in uncoupling is unlocked and swung open as the lock is lifted by a release means known as a locklift assembly.
- the locklift assembly has a toggle that acts directly on the lock and a hook pivotally connected to the toggle and non-rotatably connected to a rotor for actuation thereby and in the exemplary embodiment of the patent it is the rotor to which the actuator of the uncoupling mechanism is connected.
- E couplers are bottom-operated through a lockiift assembly having, like that of the F coupler, a toggle and a hook but connecting those elements by a connector pivotally connected thereto and itself having no fixed axis. It is to the connector that the conventional lock operating rod applies an uncoupling force and it is with adapting a fluid-operated actuator also to apply an uncoupling force to the connector that the present invention is particularly concerned.
- the improved uncoupling mechanism includes an actuator mountable on a head of the coupler and having a pressure-advanced, spring-returned piston drivably connected to an operating shaft.
- the assembly part engaged by the crank does not itself have a fixed pivot, the engagement is such as to control the swing of the part and prevent activation of an associated anticreep which otherwise could interfere with the uncoupling and is rendered unnecessary by the return spring of the actuator.
- the coupler can be uncoupled mechanically by applying a turning tool to the operatingshaft or an uncoupling rod to the crank of the uncoupling mechanism.
- FIGURE 1 is a view, partly in side elevation and in balance in vertical section, of a preferred embodiment of the fluid-operated uncoupling mechanism of the present invention applied to a standard E coupler;
- FIGURE 2 is a vertical sectional view taken along lines 22 of FIGURE 1;
- FIGURE 3 is a fragmentary horizontal sectional view taken along lines 3-3 of FIGURE 2;
- FIGURE 4 is a fragmentary vertical sectional view taken along lines 4-4 of FIGURE 2;
- FIGURE 5 is a fragmentary vertical sectional view taken along lines 55 of FIGURE 2.
- FIGURE 6 is a fragmentary vertical sectional View on an enlarged scale taken along lines 6-6 of FIGURE 5.
- the improved fluid-operated uncoupling mechanism of the present invention is particularly designed as a specific application of the mechanism of Cope Patent No. 3,245,553 to a coupler which is conventionally uncoupled by a rotary force applied directly to a longitudinally swingable part of its locklift assembly.
- the coupler so uncoupled now most used is the present bottom-operated, A.A.R. standard E coupler and it is to that coupler that the improved mechanism has been applied as exemplary of the invention.
- the present standard E coupler designated as 1, has a head 2 mounting at the front a pivoted knuckle 3. Inside the head 2 is a gravity lock 4, only the lower portion of the leg 5 of which is shown. In an uncoupling operation the lock 4 is lifted to unlock and throw open the knuckle 3. While an E coupler is adaptable for unlocking from the top or bottom, it is only the illustrated bottom or socalled rotary-operated type with which the present invention is concerned.
- the lifting of the lock 4 in an uncoupling operation is produced through a release train or so-called articulated locklift assembly 6 mounted on the underside of the head 2.
- the assembly 6 has three members or elements, one a toggle 7 suspended from and pin-and-slot or lost motion connected at its upper end to the lock leg 5, another a hook 8 suspended from and rotating, swinging or pivoting on a fixed cross-shaft or cross-bar 9 integral or rigid with and extending between and connecting laterally spaced socalled shaft walls integral with and depending from the head 2, and the third a connector 11 pivotally connected at opposite ends to and connecting lower ends of the toggle and the hook.
- the connector 11 Suspended from and swingable longitudinally of the coupler on members which themselves are swinga'ble or pivotable, the connector 11 itself does not have a fixed swinging or pivotal axis but nonetheless is limited in its swing relative to or independently of the toggle 7 and hook 8. Rearwardly, the independent swing of the connector 11 is limited by a stop shoulder 12 on the rear end of the connector which is engagable with the back 13 of the hook.
- the limit on the forward independ swing of the connector is imposed by a secondary anticreep lug 14 on the front end of the connector beyond its pivotal connection to the toggle 7 and a stop surface 15 for the lug on the underside of the head 2 forwardly of the opening 16 therein for the lock leg 5.
- the connector 11 has on one or both sides an eye 17 for receiving the looped or J-end of a conventional operating rod (not shown).
- a conventional operating rod (not shown).
- the upper part of the end rides on the eyes upper side 18 and the lower part in a recess or cavity 19 in the underside of the connector.
- Rotation of the rod relative to the connector is limited by an upper rear shoulder 20 on the connector at the rear of the eyes upper side 18 and lower front and rear shoulders 21 and 22 respectively at the front and rear of the recess 19.
- the toggle 7 will be lifted by the connector and have its upper end guided upwardly and rearwardly by the containment of the integral pin 23 on its upper end in the diagonal slot 24 in the lock leg 25 to clear a primary anticreep lug 25 on the toggle of a previously confronting ledge 26 at the front of the lock cavity 27.
- the secondary anticreep lug 14 on the front end of the connector is positioned to pass the stop surface 15 and enter the lock leg opening 16 and further rotation of the connector in the same direction by the operating rod will lift the lock to unlock and throw open the knuckle 3.
- the secondary anticreep unless the connector 11 is replaced by one not having the anticreep lug 14, poses a problem in automatic uncoupling in which, as in the illustrated embodiment, the uncoupling force is applied to a member which itself does not have a fixed pivotal axis.
- the fluid-operated uncoupling mechanism 28 of this invention is comprised of a fluid-operated actuator 29 mounted on the head 2 of the coupler 1, conveniently by welding or otherwise fixing or securing a mounting bracket 30 to the outside of the outer of the shaft walls 10 and bolting or otherwise releasably attaching a housing or casing 31 of the actuator to the bracket.
- a fluid-operated actuator 29 mounted on the head 2 of the coupler 1, conveniently by welding or otherwise fixing or securing a mounting bracket 30 to the outside of the outer of the shaft walls 10 and bolting or otherwise releasably attaching a housing or casing 31 of the actuator to the bracket.
- the preferred actuator 29 has contained in the housing 31 a piston 32 having a head 33 slida'ble in an O-ring or otherwise sealingly engaging a side wall 34 of a pressure chamber 35 conveniently formed in the bottom portion of the housing.
- a plunger 36 of the piston slides in a slide bore 37 in the housing 31, above or beyond and coaxial with and of less diameter than the pressure chamber 35.
- the preferred piston 32 has its plunger 36 connected for axial movement either in unison with or relative to its head 33, as by an axial pin 38 on the head slidably received in an axial socket 39 in the plunger.
- the preferred actuator or fluid cylinder unit 29 has its piston 32 normally yieldably held at one limit of its axial movement at which the head 33 is at one, here the bottom, end of the pressure chamber 35, by a coil or other suitable return spring 40 acting between the opposite end of the chamber and a base flange or skirt 41 on the plunger 36 normally pressed by the spring against the head 33.
- the axial or translational motion of the plunger 36 is converted into rotary motion of an operating shaft 42 drivably connected thereto and journaled in and extending through the housing 31 normal or at right angles to the plunger, the driving connection suitably being by a pinion 43 keyed or otherwise fixed against relative rotation to the shaft and intermeshing with or driva'bly engaged by a rack 44 on the plunger.
- the operating shaft 42 For the operating shaft 42 to act as intended, its axis should both be horizontal and extend laterally of the coupler 1 at least parallel to and preferably coaxial or concentric with the axis of the fixed cross-shaft 9 pivotally or swingably mounting the hook 8 of the locklift assembly 6.
- the housing 31 of the actuator 29 is so mounted on the coupler head 2 as to be offset or outset laterally from the locklift assembly 6.
- both the housing and the inner or inboard end 45 of the operating shaft projecting inwardly therefrom are laterally offset or spaced from the outer or confronting side of the outer side wall 10 on the coupler head to which the mounting bracket 30 is fixed.
- the operating shaft 42 projects at both ends from the housing 31 and has its outer or out-board end 46, as well as its inner end 45, square or otherwise out-of-round in cross section.
- crank or lever arm 47 fixed at an upper end, as by welding, to the inner end 45 of the operating shaft 42 and engaging the connector.
- the preferred crank or crank arm 47 is in the form of a bail or U-shaped member projecting downwardly or downstanding from the operating and cross-shafts 42 and 9 and laterally straddling or embracing both the locklift assembly 6 and the spaced walls 10 to and between which the cross-shaft is fixed.
- the outer is socketed to non-rotatably receive and be fixed to the inner end 45 of the operating shaft 42, while, to minimize bending, the inner leg is apertured at its upper end to rotatably receive a trunnion 50 concentric or coaxial with the operating shaft and fixed to or rigid with and instanding from a mounting plate 51, which in turn is Welded or otherwise fixed to the outside of the inner of the side or shaft walls 10.
- the horizontal, bottom or cross-leg 52 of the bail 47 underlies and fits or seats in the downwardly opening recess 19 in the bottom or underside of the connector 11.
- a rearwardly directed spur 53 which, together with the leg, is of substantially the longitudinal extent of the recess 19 and has its free rear end confronting and engageable with the shoulder 22 at the recesss rear end with either no or, for manufacturing tolerances, slight clearance therebetween when the leg is engaged with the front shoulder 21.
- the inactivation of the secondary anticreep does not increase the likelihood of accidental uncoupling, since the connection of the bail and connector against substantial relative motion enables the return spring 40 in the housing 31 to apply a positive anticreep force for holding or locking the connector against movement in a forward or uncoupling direction, except when fluid pressure is applied to actuate the actuator 29, and renders unnecessary both the primary and secondary anticreeps conventionally required. Too, the practical elimination of relative longitudinal movement or play between the bail and the connector and the lack of need for secondary or primary anticreep devices, enables the bail to be so normally positioned by the actuator 29 as normally to hold the connector with its shoulder 12 in engagement with the back 13 of the hook. In this preferred arrangement, as a consequence, the hook and coupler are in efiect unitary despite their pivotal connections, and in an uncoupling operation swing in unison about the axis of the hook.
- the coupler 1 is adapted to be uncoupled by applying fluid pressure to the head or fluid end of the pressure chamber 35 in the housing 31 of the actuator 29 through a fluid supply or inlet pipe or tube 54.
- a fluid supply or inlet pipe or tube 54 As the automatically and manually operable operating means and the fluid connections therebetween and the actuator, shown in Cope Patent No. 3,245,553 for automatically or manually operating the species of coupling mechanism illustrated therein, are equally suitable for the present coupling mechanism and described in detail in the patent, it will suflice to refer to that patent for an understanding of the manner in which actuating fluid is supplied to the actuator 29 through the supply pipe 54.
- the preferred actuating fluid is a suitable liquid to avoid the lag in operation attendant the use of a compressible gaseous actuating medium, and at least the part of the supply pipe 54 adjacent the actuator 29 is flexible to accommodate the range of service movements of the coupler head 2.
- the present mechanism will fail safe in case of a failure in the fluid pressure system, since the force of the return spring 40, applied to the connector 11 through the bail 47, normally holds the locklift assembly 6 in its coupler locked or coupled position.
- the uncoupling mechanism is adapted for mechanical actuation either by applying a suitably socketed turning tool (not shown) to the outer end 46 of the operating shaft 42 or by connecting the looped end of a conventional operating rod to the adjoining leg 48 or 49 of the bail 47.
- a suitably socketed turning tool (not shown) to the outer end 46 of the operating shaft 42 or by connecting the looped end of a conventional operating rod to the adjoining leg 48 or 49 of the bail 47.
- the separability of the plunger 36 and head 33 of the preferred piston 32 enables the plunger to be moved to uncoupling position against the force of the return spring 40 but without restraint by the frictional engagement of the then stationary head with the side wall 34 of the pressure chamber 35.
- the mounting of the uncoupling mechanism 28 on the coupler head 2 is a simple operation.
- the bail 47 will have had its outer leg 48 fixed to the inner end 45 of the operating shaft 42 during assembly of the mechanism and the only preliminaries required on the coupler head 2 are the welding of the mounting bracket 30 and mounting plate 51 and its trunnion 50 in the proper positions on the side walls 10, suitably by using templates.
- the bail 47 will be slid under the connector 11 and canted upwardly toward its inner leg 49 so that the latter can be applied to the trunnion 50, this step being facilitated by beveling the upper part of the leg, as at 55, and downwardly elongating the slot or aperture 56 in the leg in which the trunnion is received. All that then remains to complete the mounting is to swing the actuator 29 up to position and bolt its housing 31 to the mounting bracket 30.
- crank means and the swingable part are connected against substantial relative movement longitudinally of the coupler.
- crank means is engageable with stop means on an underside of the swingable part.
- stop means are front and rear stops longitudinally bounding a seat in the underside of the swingable part, and the crank means supports and restriction means fitting in said seat and acting through said stops for alternately moving the assembly in an uncoupling direction on application of fluid pressure to'the actuator means and in the absence of said pressure positively holding the assembly in coupling position under the spring force normally holding the piston in retracted position.
- a fluid-operated uncoupling mechanism wherein the rearward part of the locklift assembly is suspended from and rotatable abouta cross-shaft fixed to the head, and the operating shaft is coaxial with the cross-shaft.
- a fluid-operated uncoupling mechanism wherein the swingable part of the locklift assembly engageable by the crank means is pivotally connected at the rear to the rearward part of the assembly and the crank portion substantially longitudinally fills the seat in the swingable part between the stops and is so normally positioned as to force the swingable part and rearward part of the assembly to swing in unison about the axis of the cross-shaft throughout movement of the assembly in an uncoupling direction.
- a fluid-operated uncoupling mechanism for a bottom-operated automatic knuckle type coupler uncoupled by actuation of a locklift assembly depending from a head said locklift assembly including a rear portion suspended from and rotatable about a cross-shaft fixed to the head between laterally spaced longitudinally extending walls rigid with and depending vertically from the head and a part pivotally suspended from forward and rearward parts having front and rear stops longitudinally bounding a seat in the underside thereof and swingable longitudinally of the coupler, comprising a fluid-operated actuator means mounted on said head, said actuator means including a fluid-advanced, spring-retracted piston and an operating shaft coaxial with said cross-shaft drivably 'connected to and rotatable about a fixed axis by said piston, and bail crank means mounted on said shaft and acting through said stops for alternately moving the assembly in an uncoupling direction on application of fluid pressure to the actuator means and in the absence of said pressure positively holding the assembly in coupling position under the spring force normally
- a fluid-operated uncoupling mechanism including a mounting bracket fixed to the outside of one of the walls, a mounting plate fixed to the outside of the other wall, and a trunnion rigid with and outstanding from said plate and coaxial with the operating shaft, and wherein a housing of the actuator is releasably attached to the mounting bracket and the upper end portion of the inner leg of the bail is apertured to rotatably re- 'ceive said trunnion.
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US66366067A | 1967-08-28 | 1967-08-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3491899A true US3491899A (en) | 1970-01-27 |
Family
ID=24662775
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US663660A Expired - Lifetime US3491899A (en) | 1967-08-28 | 1967-08-28 | Fluid-operated uncoupling mechanism |
Country Status (1)
Country | Link |
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US (1) | US3491899A (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3774777A (en) * | 1971-10-18 | 1973-11-27 | Westinghouse Electric Corp | Manual latch retriever assembly for a railway car coupler |
US3780879A (en) * | 1972-01-25 | 1973-12-25 | Westinghouse Air Brake Co | Manual latch retriever apparatus for car uncoupler |
US5139161A (en) * | 1991-04-25 | 1992-08-18 | National Castings, Inc. | Automatic actuator for coupler knuckle-assembly of a railway passenger car |
US5658159A (en) * | 1995-10-27 | 1997-08-19 | Biw Connector Systems, Inc. | Connector system and methods |
US6030244A (en) * | 1996-03-15 | 2000-02-29 | Biw Connector Systems, Inc. | Connectors and methods for their use |
US6206215B1 (en) * | 1998-02-27 | 2001-03-27 | Shalong Maa | Rail car coupler |
EP1364855A1 (en) * | 2002-05-22 | 2003-11-26 | SAB WABCO GmbH | Actuation of the locking system of an automatic coupling for rail vehicles |
US20070114199A1 (en) * | 2005-11-18 | 2007-05-24 | Sharma & Associates | Automatic cut lever apparatus |
US20110049078A1 (en) * | 2009-01-22 | 2011-03-03 | Qiqihar Railway Rolling Stock Co., Ltd | Coupler Draft Gear, Double-Side Operating Coupler and Lower Lockpin Rotation Shaft Assembly |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2393912A (en) * | 1943-09-18 | 1946-01-29 | American Steel Foundries | Coupler |
US2408653A (en) * | 1943-07-30 | 1946-10-01 | American Steel Foundries | Coupler |
US2836307A (en) * | 1953-11-19 | 1958-05-27 | Buckeye Steel Castings Co | Coupler operating mechanism |
US3245553A (en) * | 1965-03-24 | 1966-04-12 | Symington Wayne Corp | Fluid-operated uncoupling mechanism |
-
1967
- 1967-08-28 US US663660A patent/US3491899A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2408653A (en) * | 1943-07-30 | 1946-10-01 | American Steel Foundries | Coupler |
US2393912A (en) * | 1943-09-18 | 1946-01-29 | American Steel Foundries | Coupler |
US2836307A (en) * | 1953-11-19 | 1958-05-27 | Buckeye Steel Castings Co | Coupler operating mechanism |
US3245553A (en) * | 1965-03-24 | 1966-04-12 | Symington Wayne Corp | Fluid-operated uncoupling mechanism |
Cited By (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3774777A (en) * | 1971-10-18 | 1973-11-27 | Westinghouse Electric Corp | Manual latch retriever assembly for a railway car coupler |
US3780879A (en) * | 1972-01-25 | 1973-12-25 | Westinghouse Air Brake Co | Manual latch retriever apparatus for car uncoupler |
US5139161A (en) * | 1991-04-25 | 1992-08-18 | National Castings, Inc. | Automatic actuator for coupler knuckle-assembly of a railway passenger car |
WO1992019482A1 (en) * | 1991-04-25 | 1992-11-12 | National Castings, Inc. | Automatic actuator for coupler knuckle-assembly of a railway passenger car |
US5658159A (en) * | 1995-10-27 | 1997-08-19 | Biw Connector Systems, Inc. | Connector system and methods |
US6030244A (en) * | 1996-03-15 | 2000-02-29 | Biw Connector Systems, Inc. | Connectors and methods for their use |
US6206215B1 (en) * | 1998-02-27 | 2001-03-27 | Shalong Maa | Rail car coupler |
EP1364855A1 (en) * | 2002-05-22 | 2003-11-26 | SAB WABCO GmbH | Actuation of the locking system of an automatic coupling for rail vehicles |
US20070114199A1 (en) * | 2005-11-18 | 2007-05-24 | Sharma & Associates | Automatic cut lever apparatus |
US7562781B2 (en) * | 2005-11-18 | 2009-07-21 | Kandoth-Kannoth Harish K | Automatic cut lever apparatus |
US20110049078A1 (en) * | 2009-01-22 | 2011-03-03 | Qiqihar Railway Rolling Stock Co., Ltd | Coupler Draft Gear, Double-Side Operating Coupler and Lower Lockpin Rotation Shaft Assembly |
US8469211B2 (en) * | 2009-01-22 | 2013-06-25 | Qiqihar Railway Rolling Stock Co., Ltd. | Coupler draft gear, double-side operating coupler and lower lockpin rotation shaft assembly |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: FIRST NATIONAL BANK OF CHICAGO, THE,ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:AMSTED INDUSTRIES INCORPORATED;REEL/FRAME:004666/0778 Effective date: 19860227 Owner name: FIRST NATIONAL BANK OF CHICAGO, THE, ONE FIRST NAT Free format text: SECURITY INTEREST;ASSIGNOR:AMSTED INDUSTRIES INCORPORATED;REEL/FRAME:004666/0778 Effective date: 19860227 |
|
AS | Assignment |
Owner name: AMSTED INDUSTRIES, INC., 3700 PRUDENTIAL PLAZA, CH Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:DRESSER INDUSTRIES, INC., A CORP OF DE.;REEL/FRAME:004513/0932 Effective date: 19850911 |
|
AS | Assignment |
Owner name: AMSTED INDUSTRIES INCORPORATED, A CORP. OF DE., IL Free format text: RELEASED BY SECURED PARTY;ASSIGNOR:FIRST NATIONAL BANK OF CHICAGO, AS AGENT;REEL/FRAME:005070/0731 Effective date: 19880831 |