Patent US4236458A successfully refreshed from Google Patents.
US4236458A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Door locking and actuating mechanism for hopper car
Assignee: Pullman Standard Inc
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Filing: 1978-12-26
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Granted: 1980-12-02
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Expires: 1998-12-26
Abstract
Abstract A locking and actuating mechanism for a pair of horizontally movable hopper doors includes an arm and actuating linkage which engages a track side cam for moving the doors between open and closed positions. One of the doors includes a keeper which is engageable by a latch mechanism in the other door. The latch mechanism includes a linkage arrangement which is connected to the actuating link and arm by means of a lost motion connection.
Inventors
- 👤 Eugene I. Varda
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 05:58
CPC Classifications
B; B61; B61D; B61D7/00; B61D7/14; B61D7/16; B61D7/24; B61D7/30; B61D7/18
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
227 words
A railway hopper car having an underframe, a hopper structure supported on said underframe, walls on said hopper structure defining at their lower ends a discharge opening, a pair of doors pivotably connected to said hopper structure for outward movement from a closed position below said discharge opening to an open position, the improvement of a door actuating and locking arrangement comprising: a pair of arms each pivotally connected to said car on opposite sides of said discharge opening, each of said arms including a cam follower supported thereon, a pair of actuating links each pivotally connected to one of said arms and to one of said doors, each of said doors having inner longitudinal nose portions sealingly engaging each other in the closed position of said doors, a locking mechanism including keeper means mounted on one end of one of said doors and overlapping an end of said other door, a latch member slidingly mounted on said other door, means biasing said latch member into locking engagement with said keeper means in the closed position of said doors, and said latch member operatively connected with said actuating link whereby during engagement of said cam with an associated door opening mechanism, said arm and actuating link are pivoted outwardly and said latch member and keeper means are disengaged whereby said doors are moved to said open position.
Claim 2
Dependent Claim
227 words
A railway hopper car having an underframe, a hopper structure supported on said underframe, walls on said hopper structure defining at their lower ends a discharge opening, a pair of doors pivotably connected to said hopper structure for outward movement from a closed position below said discharge opening to an open position, the improvement of a door actuating and locking arrangement comprising: a pair of arms each pivotally connected to said car on opposite sides of said discharge opening, each of said arms including a cam follower supported thereon, a pair of actuating links each pivotally connected to one of said arms and to one of said doors, each of said doors having inner longitudinal nose portions sealingly engaging each other in the closed position of said doors, a locking mechanism including keeper means mounted on one end of one of said doors and overlapping an end of said other door, a latch member slidingly mounted on said other door, means biasing said latch member into locking engagement with said keeper means in the closed position of said doors, and said latch member operatively connected with said actuating link whereby during engagement of said cam with an associated door opening mechanism, said arm and actuating link are pivoted outwardly and said latch member and keeper means are disengaged whereby said doors are moved to said open position.
Claim 3
Dependent Claim
41 words
The invention in accordance with claim 1, the nose portion of said one door including inwardly sloping longitudinal groove portions, and the nose portion of the other door including outwardly converging longitudinal wall portions engaging said groove portions in nesting relation.
Claim 4
Dependent Claim
20 words
The invention in accordance with claim 1, said actuating link being connected to said doors by lost motion connecting means.
Claim 5
Dependent Claim
45 words
The invention in accordance with claim 3, said lost motion connecting means including a plate pivotally connected to said other door, means pivotally connecting said plate to said actuating link, said plate having an elongated slot, and pivot means on said door engaging said slot.
Claim 6
Dependent Claim
34 words
The invention in accordance with claim 4, said pivot means including a bracket connected to and projecting outwardly from said other door, and a pivot pin on said bracket slidingly engaging said elongated slot.
Claim 7
Dependent Claim
89 words
The invention in accordance with claim 1, other second linkage means including a first tension link means pivotally connected to said latch member, a bell crank lever pivotally connected to said second door, means pivotally connecting said bell crank lever at one end to said first tension link, a second tension link extending laterally with respect to said first tension link, means pivotally connecting said second tension link to the other end of said bell crank lever, and means pivotally connecting said second tension link to said actuating link.
Claim 8
Dependent Claim
24 words
The invention in accordance with claim 6, said means pivotally connecting said second tension link to said actuating link including a lost motion connection.
Claim 9
Dependent Claim
23 words
The invention in accordance with claim 7, said latch member including means biasing said latch member into locking engagement with said keeper member.
Claim 10
Dependent Claim
25 words
The invention in accordance with claim 8, said latch member including lost motion connecting means connecting said first tension link means to said latch member.
Claim 11
Dependent Claim
53 words
The invention in accordance with claim 6, said means pivotally connecting said actuating link to said second tension link including, bracket means mounted on said other door, a vertical plate hingedly supported on said bracket means, and means pivotally connecting said vertical plate to said actuating link and to said second tension link.
Claim 12
Dependent Claim
49 words
The invention in accordance with claim 10, including second bracket means mounted on said other door and projecting outwardly with respect thereto, and a pivot pin means mounted on said second bracket means, said vertical plate having an elongated slot engaging said pivot pin means in relative sliding relation.
Claim 13
Dependent Claim
22 words
The invention in accordance with claim 11, said means connecting said vertical plate to said second tension link including a connector linkage.
Claim 14
Dependent Claim
155 words
A railway hopper car having a hopper structure including a discharge opening at its lower end, a pair of doors pivotally connected with said hopper structure for movement from a closed position below said discharge opening to an open position away from said discharge opening, the improvement of a door actuating and locking arrangement comprising: arm means pivotally connected to opposite sides of said hopper car and to each of said doors, a locking mechanism carried by said doors including a latch means movably mounted on one of said doors and a keeper means mounted on the other of said doors adapted to be engaged by said latch means in the closed position of said doors, and said latch means operatively connected with said arm means, whereby pivoted movement of said arm means by an associated door opening mechanism disengages said latch means and said keeper means and moves said doors to said open position.
Claim 15
Dependent Claim
155 words
A railway hopper car having a hopper structure including a discharge opening at its lower end, a pair of doors pivotally connected with said hopper structure for movement from a closed position below said discharge opening to an open position away from said discharge opening, the improvement of a door actuating and locking arrangement comprising: arm means pivotally connected to opposite sides of said hopper car and to each of said doors, a locking mechanism carried by said doors including a latch means movably mounted on one of said doors and a keeper means mounted on the other of said doors adapted to be engaged by said latch means in the closed position of said doors, and said latch means operatively connected with said arm means, whereby pivoted movement of said arm means by an associated door opening mechanism disengages said latch means and said keeper means and moves said doors to said open position.
Claim 16
Dependent Claim
60 words
The invention in accordance with claim 13, wherein, said arm means include an arm on each side of said car having one end pivotally connected to said car, and said arm means further including an actuating link on each side of said car pivotally connected with the other end of said arm and being pivotally connected to a respective door.
Claim 17
Dependent Claim
20 words
The invention in accordance with claim 14, and one of said actuating links being operatively connected to said latch means.
Claim 18
Dependent Claim
53 words
The invention in accordance with claim 15, said actuating links being connected to said doors by lost motion connecting means whereby initial movement of said arms by an associated door opening mechanism disengages said latch means from said keeper means and further movement of said arms moves said doors to the open position.
Claim 19
Dependent Claim
28 words
The invention in accordance with claim 13, and each of said doors having inner longitudinal nose portions sealingly engaging each other in the closed position of said doors.
Claim 20
Dependent Claim
24 words
The invention in accordance with claim 13, and said latch means including means biasing said latch means into locking engagement with said keeper member.
Claim 21
Dependent Claim
62 words
The invention in accordance with claim 13, said latch means include a pair of latch members each movably mounted on opposite longitudinal ends of said one of said doors, and each of said latch members being operatively connected to said arm means whereby initial pivotal movement of said arm means moves said latch members from a locked position to an unlocked position.
Claim 22
Dependent Claim
65 words
The invention in accordance with claim 19, said latch means further including a first tension rod operatively connected to each of said latch members, a pair of bell crank levers pivotally mounted on said one of said doors, each bell crank lever pivotally connected to a respective first tension rod, and a second tension rod operatively connecting said bell crank levers and said arm means.
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) | 1983-12-02 | 1984-06-02 | 1984-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-12-02 | 1988-06-02 | 1988-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-12-02 | 1992-06-02 | 1992-12-02 | $7700.00 | Window Closed / Lapsed |