US3568855A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydraulic cushioning apparatus for railway cars
Assignee: Halliburton Co
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Filing: 1968-05-27
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Granted: 1971-03-09
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Expires: 1988-05-27
Abstract
Abstract Cushioning apparatus for railway cars, which apparatus includes an hydraulic impedance mechanism having a high pressure cylinder and a low pressure cylinder. The high pressure cylinder is operable to transmit mechanical buff shock independent of the low pressure cylinder. A coupling apparatus for a railway car where a draft key is limited to a fixed increment of movement while buff movement of a coupler under the continuous control of an hydraulic impedance mechanism takes place over an increment exceeding the length of the fixed movement increment of the draft key. A method and apparatus for cushioning forces imposed on a railway coupling wherein draft key movement is limited to a first increment, hydraulically controlled buff movement of a coupler takes place over a second increment exceeding the length of the first increment, and mechanical force is transmitted through a high pressure cylinder of an impedance mechanism, substantially to the exclusion of forced transmission through a low pressure cylinder.
Inventors
- 👤 Orum E Seay
- 👤 Robert Q Shelton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 12:36
CPC Classifications
B; B61; B61G; B61G9/00; B61G9/04; B61G9/08
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
190 words
A railway cushioning apparatus comprising: outer cylinder means; said outer cylinder means to define an annular space; piston means mounted for axial sliding movement within and relative to said inner cylinder means; hydraulic impedance means operable to impede, but permit, a flow of fluid from the interior of one end of said inner cylinder means to and through said annular space and into the interior of another end portion of said inner cylinder means; means operable to connect one of said piston means and outer cylinder means with coupling means; means operable to transmit mechanical, buff shock longitudinally through said inner cylinder means and substantially prevent the transmission of said mechanical buff shock through said outer cylinder means; said last named means comprising cylinder head means closing one end of said inner cylinder means, slidably mounted within said outer cylinder means, and operable in response to buff shock transmitted thereto, to transmit buff shock to said inner cylinder means, said cylinder head means being further operable in response to buff shock induced, axial contraction of said inner cylinder means to move longitudinally of and relative to said outer cylinder means.
Claim 2
Dependent Claim
190 words
A railway cushioning apparatus comprising: outer cylinder means; said outer cylinder means to define an annular space; piston means mounted for axial sliding movement within and relative to said inner cylinder means; hydraulic impedance means operable to impede, but permit, a flow of fluid from the interior of one end of said inner cylinder means to and through said annular space and into the interior of another end portion of said inner cylinder means; means operable to connect one of said piston means and outer cylinder means with coupling means; means operable to transmit mechanical, buff shock longitudinally through said inner cylinder means and substantially prevent the transmission of said mechanical buff shock through said outer cylinder means; said last named means comprising cylinder head means closing one end of said inner cylinder means, slidably mounted within said outer cylinder means, and operable in response to buff shock transmitted thereto, to transmit buff shock to said inner cylinder means, said cylinder head means being further operable in response to buff shock induced, axial contraction of said inner cylinder means to move longitudinally of and relative to said outer cylinder means.
Claim 3
Dependent Claim
398 words
A railway cushioning apparatus comprising: outer cylinder means including: a cylindrical outer sidewall having buff and draft end portions, a first cylinder head disposed generally at said buff portion end of said outer sidewall, means fixedly anchoring said first cylinder head in relation to said outer sidewall, a second cylinder head disposed generally at said draft end portion of said outer sidewall, and said second cylinder head being slidably mounted within said outer sidewall for axial movement relative to said outer side wall generally toward said first cylinder head; inner cylinder means including: a cylindrical, inner sidewall having buff and draft end portions, a third cylinder head disposed generally at said buff end portion of said inner sidewall, means fixedly anchoring said third cylinder head in relation to said inner sidewall, a fourth cylinder head disposed generally at said draft end portion of said inner sidewall, and said fourth cylinder head being mounted for axial movement relative to said outer sidewall, generally toward said third cylinder head; said axial movement of said second cylinder head relative to said outer sidewall being permitted in Response to axial contraction of said inner sidewall; said first and third cylinder heads being provided, respectively, by portions of common plate means; said second and fourth cylinder heads being provided respectively, by portions of other common plate means; piston means including: a piston head mounted for axial sliding movement within said inner sidewall; a main piston rod projecting from said piston head slidably and telescopingly through said fourth cylinder head; said inner sidewall being spaced inwardly from said outer sidewall to define an annular space; said inner sidewall engaging said second cylinder head and being operable to elastically resist movement of said second cylinder head generally toward said first cylinder head; yoke means connected with said main piston rod, said yoke means being operable to be connected with a coupling bar; impedance means operable to impede but permit a flow of fluid between the interiors of the draft and buff end portions of said inner sidewall through said annular space; said yoke means being operable to abuttingly engage said second cylinder head of said outer cylinder means and impart mechanical buff force thereto, with said force being transmitting through said inner sidewall to said first cylinder head, said axially movable second cylinder head substantially preventing the transmittal of said force through said outer sidewall.
Claim 4
Dependent Claim
398 words
A railway cushioning apparatus comprising: outer cylinder means including: a cylindrical outer sidewall having buff and draft end portions, a first cylinder head disposed generally at said buff portion end of said outer sidewall, means fixedly anchoring said first cylinder head in relation to said outer sidewall, a second cylinder head disposed generally at said draft end portion of said outer sidewall, and said second cylinder head being slidably mounted within said outer sidewall for axial movement relative to said outer side wall generally toward said first cylinder head; inner cylinder means including: a cylindrical, inner sidewall having buff and draft end portions, a third cylinder head disposed generally at said buff end portion of said inner sidewall, means fixedly anchoring said third cylinder head in relation to said inner sidewall, a fourth cylinder head disposed generally at said draft end portion of said inner sidewall, and said fourth cylinder head being mounted for axial movement relative to said outer sidewall, generally toward said third cylinder head; said axial movement of said second cylinder head relative to said outer sidewall being permitted in Response to axial contraction of said inner sidewall; said first and third cylinder heads being provided, respectively, by portions of common plate means; said second and fourth cylinder heads being provided respectively, by portions of other common plate means; piston means including: a piston head mounted for axial sliding movement within said inner sidewall; a main piston rod projecting from said piston head slidably and telescopingly through said fourth cylinder head; said inner sidewall being spaced inwardly from said outer sidewall to define an annular space; said inner sidewall engaging said second cylinder head and being operable to elastically resist movement of said second cylinder head generally toward said first cylinder head; yoke means connected with said main piston rod, said yoke means being operable to be connected with a coupling bar; impedance means operable to impede but permit a flow of fluid between the interiors of the draft and buff end portions of said inner sidewall through said annular space; said yoke means being operable to abuttingly engage said second cylinder head of said outer cylinder means and impart mechanical buff force thereto, with said force being transmitting through said inner sidewall to said first cylinder head, said axially movable second cylinder head substantially preventing the transmittal of said force through said outer sidewall.
Claim 5
Dependent Claim
266 words
Apparatus as described in claim 2: said apparatus including first end plate means having: a first plate portion defining said third cylinder head and telescopingly received within said buff end portion of said inner sidewall and disposed in interfering fit in relation to said inner sidewall, and a second plate portion projecting radially outwardly from said first plate portion and defining said first cylinder head; said apparatus including second end plate means having: a third plate portion defining said fourth cylinder head and telescopingly received within said draft end portion of said inner sidewall and disposed in interfering fit in relation to said inner sidewall and a fourth plate portion projecting radially outwardly from said third plate portion and defining said second cylinder head; said piston means including an auxiliary piston rod extending axially away from said main piston rod and having a cross section equal to that of said main piston rod; said first end plate means defining an aperture telescopingly and slidably receiving said auxiliary piston rod; wall means attached to said first plate means externally of said outer cylinder means and enclosing said auxiliary piston rod, said wall means defining a fluid reservoir; first passage means providing fluid communication between said fluid reservoir and said annular space; seal means mounted in said second plate means and providing a substantial seal between said second plate means and said main piston rod; second passage means providing fluid communication between said seal means and said annular space and operable to transmit fluid leaking between said main piston rod and said seal means to said annular space.
Claim 6
Dependent Claim
187 words
An apparatus as described in claim 3 wherein said impedance means comprises: a plurality of check valves mounted on said draft end portion of said inner sidewall, each of said check valves being operable to transmit fluid from said annular space through said inner sidewall to the interior of said draft end portion of said inner sidewall in response to buff movement of said piston means; control valve means mounted on said draft end portion of said inner sidewall, said control valve including valve means biased to an open condition and operable when open to permit a flow of fluid from the interior of said draft end of said inner sidewall to said annular space, said control valve means being operable to close and prevent said flow of fluid in response to a predetermined rate of draft movement oF said piston means; and a check valve mounted in said buff end of said inner sidewall and operable to permit a flow of fluid from said annular space into the interior of said buff end of said inner sidewall in response to draft movement of said piston means.
Claim 7
Dependent Claim
325 words
A railway cushioning apparatus comprising: cylinder means; piston means mounted for telescoping movement within and relative to said cylinder means; impedance means operable to impede movement of said piston means within and relative to said cylinder means one of said piston means and cylinder means being adapted to be fixedly positioned on a railway car; the other of said piston means and cylinder means being operable to be connected with coupling means; movement limiting means operable to limit draft movement of said coupling means to a first, fixed increment; and extensible connection means between said coupling means and said other of s said piston means and cylinder means and operable to permit a second increment of buff movement of said coupling means under the continuous control of said impedance means, with said second increment exceeding the length of said first increment; said extensible connection means including: yoke means connected with said other of said piston means and cylinder means, lost motion coupling means interconnecting said yoke means and said coupling means, said lost motion coupling means including first sill slot means carried by said railway car and having a closed draft end, draw bar means in said coupling means, key means carried by said draw bar means, and second, slot means in said yoke means extending longitudinally of said railway car and in the general direction of said buff and draft movements of said coupling means, said second, slot means supporting said key means for movement longitudinally of said railway car, and said yoke means, said closed draft end of said sill slot means being operable to limit movement of said key means in response to draft force acting thereon through said draw bar means, with said second, slot means being operable to permit movement of said yoke means, in a draft direction, continued in said draft direction after said draft end of said sill slot means has limited said movement of sail key means.
Claim 8
Dependent Claim
325 words
A railway cushioning apparatus comprising: cylinder means; piston means mounted for telescoping movement within and relative to said cylinder means; impedance means operable to impede movement of said piston means within and relative to said cylinder means one of said piston means and cylinder means being adapted to be fixedly positioned on a railway car; the other of said piston means and cylinder means being operable to be connected with coupling means; movement limiting means operable to limit draft movement of said coupling means to a first, fixed increment; and extensible connection means between said coupling means and said other of s said piston means and cylinder means and operable to permit a second increment of buff movement of said coupling means under the continuous control of said impedance means, with said second increment exceeding the length of said first increment; said extensible connection means including: yoke means connected with said other of said piston means and cylinder means, lost motion coupling means interconnecting said yoke means and said coupling means, said lost motion coupling means including first sill slot means carried by said railway car and having a closed draft end, draw bar means in said coupling means, key means carried by said draw bar means, and second, slot means in said yoke means extending longitudinally of said railway car and in the general direction of said buff and draft movements of said coupling means, said second, slot means supporting said key means for movement longitudinally of said railway car, and said yoke means, said closed draft end of said sill slot means being operable to limit movement of said key means in response to draft force acting thereon through said draw bar means, with said second, slot means being operable to permit movement of said yoke means, in a draft direction, continued in said draft direction after said draft end of said sill slot means has limited said movement of sail key means.
Claim 9
Dependent Claim
281 words
A railway cushioning comprising; cylinder means; piston means mounted for telescoping movement within relative to said cylinder means; hydraulic impedance means operable to impede but permit movement of said piston means within and relative to said cylinder means; piston rod means extending from said piston means; yoke means connected with said piston rod means; said yoke means including longitudinally extending, yoke slot means; sill means; said sill means including longitudinally extending sill slot means; key means interconnecting said sill means and said yoke means, said key means being slidably disposed in and intersecting said yoke slot means and said sill slot means; coupling means connected with said key means; said coupling means including longitudinally extending coupling slot means; said key means being longitudinally movable through said yoke slot means; said key means being longitudinally movable through said sill slot means; said yoke slot means having: a draft end engageable with said key means in response to draft movement of said coupling means, and a buff end; said sill slot means having; a draft end engageable with said key means in response to draft movement of said coupling means, and a buff end engageable with said key means in response to buff movement of said coupling means; and resilient restoring means operable to move said yoke means away from said cylinder means, subsequent to engagement of said key means with the draft end of said sill slot means, and position said yoke means at a fully restored position with said draft end of said yoke slot means sPaced from said key means; said hydraulic impedance means being operable to continuously impede buff movement of said yoke means from said fully restored position.
Claim 10
Dependent Claim
281 words
A railway cushioning comprising; cylinder means; piston means mounted for telescoping movement within relative to said cylinder means; hydraulic impedance means operable to impede but permit movement of said piston means within and relative to said cylinder means; piston rod means extending from said piston means; yoke means connected with said piston rod means; said yoke means including longitudinally extending, yoke slot means; sill means; said sill means including longitudinally extending sill slot means; key means interconnecting said sill means and said yoke means, said key means being slidably disposed in and intersecting said yoke slot means and said sill slot means; coupling means connected with said key means; said coupling means including longitudinally extending coupling slot means; said key means being longitudinally movable through said yoke slot means; said key means being longitudinally movable through said sill slot means; said yoke slot means having: a draft end engageable with said key means in response to draft movement of said coupling means, and a buff end; said sill slot means having; a draft end engageable with said key means in response to draft movement of said coupling means, and a buff end engageable with said key means in response to buff movement of said coupling means; and resilient restoring means operable to move said yoke means away from said cylinder means, subsequent to engagement of said key means with the draft end of said sill slot means, and position said yoke means at a fully restored position with said draft end of said yoke slot means sPaced from said key means; said hydraulic impedance means being operable to continuously impede buff movement of said yoke means from said fully restored position.
Claim 11
Dependent Claim
45 words
A railway cushioning apparatus as described in claim 6 including: abutment means mounted on said cylinder means and operable to engage and limit buff movement of said yoke means subsequent to engagement of said key means with said buff end of said sill slot means.
Claim 12
Dependent Claim
92 words
An apparatus as described in claim 7: wherein, at an impact position of said yoke means, said buff end of said sill slot means is operable, to engage said key means with said draft end of said yoke slot means concurrently engaging said key means and with said abutment means being spaced from said yoke means; said sill means, yoke means and key means being sufficiently elastic to permit continued buff movement of said yoke means beyond said impact position to bring said yoke means into abutting engagement with said abutment means.
Claim 13
Independent Claim
248 words
An apparatus for cushioning forces imposed on a railway coupling, said apparatus comprising; key means connecting a railway coupling to a railway car sill; impedance means for hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling, said impedance means including a low pressure cylinder wall encircling and spaced from a high pressure cylinder wall; means for circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between said high pressure cylinder wall and said low pressure cylinder wall of said impedance means; means for transmitting mechanical shock from said coupling to a portion of a railway car through said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car; said last named means comprising cylinder head means closing one end of said high pressure cylinder wall, slidably mounted within said low pressure cylinder wall, and operable in response to mechanical shock transmitted thereto, to transmit mechanical shock to said high pressure cylinder wall, said cylinder head means being further operable in response to mechanical shock induced, axial contraction of said high pressure cylinder wall to move longitudinally of and relative to said low pressure cylinder wall; and means for restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less that that of said buff increment.
Claim 14
Independent Claim
248 words
An apparatus for cushioning forces imposed on a railway coupling, said apparatus comprising; key means connecting a railway coupling to a railway car sill; impedance means for hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling, said impedance means including a low pressure cylinder wall encircling and spaced from a high pressure cylinder wall; means for circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between said high pressure cylinder wall and said low pressure cylinder wall of said impedance means; means for transmitting mechanical shock from said coupling to a portion of a railway car through said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car; said last named means comprising cylinder head means closing one end of said high pressure cylinder wall, slidably mounted within said low pressure cylinder wall, and operable in response to mechanical shock transmitted thereto, to transmit mechanical shock to said high pressure cylinder wall, said cylinder head means being further operable in response to mechanical shock induced, axial contraction of said high pressure cylinder wall to move longitudinally of and relative to said low pressure cylinder wall; and means for restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less that that of said buff increment.
Claim 15
Independent Claim
276 words
An apparatus for cushioning forces imposed on a railway coupling, said apparatus comprising: key means connecting a railway coupling to a railway car sill; impedance means for hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling, said impedance means including a low pressure cylinder wall encircling and spaced from a high pressure cylinder wall; means for circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between said high pressure cylinder wall and said low pressure cylinder wall of said impedance means; first means for transmitting a first mechanical buff shock from said coupling to slotted sill sidewall means of said railway car; second means for transmitting a second mechanical buff shock from said coupling to a portion of said railway car through said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical buff shock through said low pressure cylinder wall to said portion of said railway car; said second means comprising cylinder head means closing one end of said high pressure cylinder wall, slidably mounted within said low pressure cylinder wall, and operable in response to mechanical buff shock transmitted thereto, to transmit mechanical buff shock to said high pressure cylinder wall, said cylinder head means being further operable in response to mechanical buff shock induced, axial contraction of said high pressure cylinder wall to move longitudinally of and relative to said low pressure cylinder wall; and means for restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less than that of said buff increment.
Claim 16
Independent Claim
276 words
An apparatus for cushioning forces imposed on a railway coupling, said apparatus comprising: key means connecting a railway coupling to a railway car sill; impedance means for hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling, said impedance means including a low pressure cylinder wall encircling and spaced from a high pressure cylinder wall; means for circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between said high pressure cylinder wall and said low pressure cylinder wall of said impedance means; first means for transmitting a first mechanical buff shock from said coupling to slotted sill sidewall means of said railway car; second means for transmitting a second mechanical buff shock from said coupling to a portion of said railway car through said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical buff shock through said low pressure cylinder wall to said portion of said railway car; said second means comprising cylinder head means closing one end of said high pressure cylinder wall, slidably mounted within said low pressure cylinder wall, and operable in response to mechanical buff shock transmitted thereto, to transmit mechanical buff shock to said high pressure cylinder wall, said cylinder head means being further operable in response to mechanical buff shock induced, axial contraction of said high pressure cylinder wall to move longitudinally of and relative to said low pressure cylinder wall; and means for restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less than that of said buff increment.
Claim 17
Independent Claim
616 words
An apparatus for cushioning forces imposed on a railway coupling, said apparatus comprising: key means connecting a railway coupling to a railway car sill with said car sill including first slot means extending longitudinally of said car sill and having longitudinally spaced, closed buff and draft ends, and with said key means being connected with said coupling and passing transversely through, and being longitudinally slidable in said first slot means; impedance means for hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling, said impedance means extending longitudinally of said car sill and including a low pressure cylinder wall encircling and spaced from a high pressure cylinder wall; means for circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between said high pressure cylinder wall and said low pressure cylinder wall of said impedance means; first yoke means for transmitting a first mechanical buff shock from said coupling to slotted sill sidewall means of said railway car; said first yoke means including: yoke means connected with and extending longitudinally of said impedance means, and second slot means carried by and extending longitudinally of said yoke means and having longitudinally spaced, closed buff and draft ends, with said key means passing transversely through said second and first slot means and being longitudinally slidable in said second slot means; second coupling carried abutment means for transmitting a second mechanical buff shock from said coupling to a portion of said railway car through said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car; said second coupling means including cylinder head means closing one end of said high pressure cylinder wall, slidably mounted within said low pressure cylinder wall, and operable in response to mechanical buff shock transmitted thereto, to transmit mechanical buff shock to said high pressure cylinder wall, said cylinder head means being further operable in response to mechanical buff shock induced, axial contraction of said high pressure cylinder wall to move longitudinally of and relative to said low pressure cylinder wall; and restoring means for restoring said coupling along an increment of draft movement, with said key means being engageable with the draft end of said first slot means in response to draft movement of said coupling prior to the termination of draft movement of said yoke means as caused by said restoring means; said restoring means comprising spring means extending longitudinally of said draft and buff movement increments, said spring means being operable to restore said coupling to the draft extremity of said increment of draft movement and to tend to yieldably maintain said coupling at said extremity, said spring means including; a pair of horizontally spaced coil springs, first, mutually convergeable, abutment means spaced longitudinally of said buff increment and interconnecting said pair of coil springs with said coupling and said railway car whereby draft movement of said coupling induces compression of said pair of coil springs operable to tend to restore said coupling to said draft extremity. additional coil spring means displaced at least in part axially from, and interposed, at least in part, horizontally between said pair of coil springs, and second mutually convergeable, abutment means spaced longitudinally of said buff increment and interconnecting said coupling and said pair of coil springs, said second abutment means being operable to induce compression of said additional coil spring means in response to draft movement of said coupling relative to said pair of coil springs, with said compression of said additional coil spring means tending to restore said coupling to said draft extremity.
Claim 18
Independent Claim
616 words
An apparatus for cushioning forces imposed on a railway coupling, said apparatus comprising: key means connecting a railway coupling to a railway car sill with said car sill including first slot means extending longitudinally of said car sill and having longitudinally spaced, closed buff and draft ends, and with said key means being connected with said coupling and passing transversely through, and being longitudinally slidable in said first slot means; impedance means for hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling, said impedance means extending longitudinally of said car sill and including a low pressure cylinder wall encircling and spaced from a high pressure cylinder wall; means for circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between said high pressure cylinder wall and said low pressure cylinder wall of said impedance means; first yoke means for transmitting a first mechanical buff shock from said coupling to slotted sill sidewall means of said railway car; said first yoke means including: yoke means connected with and extending longitudinally of said impedance means, and second slot means carried by and extending longitudinally of said yoke means and having longitudinally spaced, closed buff and draft ends, with said key means passing transversely through said second and first slot means and being longitudinally slidable in said second slot means; second coupling carried abutment means for transmitting a second mechanical buff shock from said coupling to a portion of said railway car through said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car; said second coupling means including cylinder head means closing one end of said high pressure cylinder wall, slidably mounted within said low pressure cylinder wall, and operable in response to mechanical buff shock transmitted thereto, to transmit mechanical buff shock to said high pressure cylinder wall, said cylinder head means being further operable in response to mechanical buff shock induced, axial contraction of said high pressure cylinder wall to move longitudinally of and relative to said low pressure cylinder wall; and restoring means for restoring said coupling along an increment of draft movement, with said key means being engageable with the draft end of said first slot means in response to draft movement of said coupling prior to the termination of draft movement of said yoke means as caused by said restoring means; said restoring means comprising spring means extending longitudinally of said draft and buff movement increments, said spring means being operable to restore said coupling to the draft extremity of said increment of draft movement and to tend to yieldably maintain said coupling at said extremity, said spring means including; a pair of horizontally spaced coil springs, first, mutually convergeable, abutment means spaced longitudinally of said buff increment and interconnecting said pair of coil springs with said coupling and said railway car whereby draft movement of said coupling induces compression of said pair of coil springs operable to tend to restore said coupling to said draft extremity. additional coil spring means displaced at least in part axially from, and interposed, at least in part, horizontally between said pair of coil springs, and second mutually convergeable, abutment means spaced longitudinally of said buff increment and interconnecting said coupling and said pair of coil springs, said second abutment means being operable to induce compression of said additional coil spring means in response to draft movement of said coupling relative to said pair of coil springs, with said compression of said additional coil spring means tending to restore said coupling to said draft extremity.
Claim 19
Independent Claim
180 words
A method of cushioning forces imposed on a railway coupling, said method comprising: connecting a railway coupling to a railway car sill with key means; hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling; circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between a high pressure cylinder wall and a low pressure cylinder wall; transmitting mechanical shock from said coupling to a portion of a railway car through cylinder head means closing one end of said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car by moving said cylinder head means longitudinally along and relative to said low pressure cylinder wall in response to axial contraction of said high pressure cylinder wall caused by said mechanical shock; and restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less than that of said buff increment.
Claim 20
Independent Claim
180 words
A method of cushioning forces imposed on a railway coupling, said method comprising: connecting a railway coupling to a railway car sill with key means; hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling; circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between a high pressure cylinder wall and a low pressure cylinder wall; transmitting mechanical shock from said coupling to a portion of a railway car through cylinder head means closing one end of said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car by moving said cylinder head means longitudinally along and relative to said low pressure cylinder wall in response to axial contraction of said high pressure cylinder wall caused by said mechanical shock; and restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less than that of said buff increment.
Claim 21
Independent Claim
198 words
A method of cushioning forces imposed on a railway coupling, said method comprising: connecting a railway coupling to a railway car sill with key means; hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling; circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between a high pressure cylinder wall and a low pressure cylinder wall; transmitting a first mechanical buff shock from said coupling to slotted sill wall means of said railway car; transmitting mechanical shock from said coupling to a portion of said railway car through cylinder head means closing one end of said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car by moving said cylinder head means longitudinally along and relative to said low pressure cylinder wall in response to axial contraction of said high pressure cylinder wall caused by said mechanical shock; and restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less than that of said buff increment.
Claim 22
Independent Claim
198 words
A method of cushioning forces imposed on a railway coupling, said method comprising: connecting a railway coupling to a railway car sill with key means; hydraulically impeding buff movement of said railway coupling continuously over a predetermined increment of buff movement of said coupling; circulating hydraulic fluid operable to impede movement of said coupling through an annular space located between a high pressure cylinder wall and a low pressure cylinder wall; transmitting a first mechanical buff shock from said coupling to slotted sill wall means of said railway car; transmitting mechanical shock from said coupling to a portion of said railway car through cylinder head means closing one end of said high pressure cylinder wall while concurrently, substantially preventing the transmission of said mechanical shock through said low pressure cylinder wall to said portion of said railway car by moving said cylinder head means longitudinally along and relative to said low pressure cylinder wall in response to axial contraction of said high pressure cylinder wall caused by said mechanical shock; and restoring said coupling along an increment of draft movement while limiting draft movement of said key means to an increment less than that of said buff increment.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-08 | 1974-09-07 | 1975-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-08 | 1978-09-07 | 1979-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-08 | 1982-09-07 | 1983-03-09 | $7700.00 | Window Closed / Lapsed |