US3718100A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Railroad box car and door positioning and stop means therefor
Assignee: PULLMAN LEASING Co A DE CORP
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Filing: 1971-01-07
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Granted: 1973-02-27
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Expires: 1991-01-07
Abstract
Abstract In a railroad box car having on each side a pair of outwardly and inwardly moving doors to open and close a central door opening, longitudinally spaced door positioning and door stop means in the form of bottom-of-door catch assemblies including a pair of longitudinally spaced catch units for holding the door in a closed position and a half-opened position and a fully opened position respectively and further stop means at each end of each side of the car inwardly of an end ladder to prevent movement of a respective door outwardly beyond the ladder to the fully opened position, each catch unit including a pivotally mounted vertical catch arm mounted on the door and engageable with stop blocks on the car side sill and the stop means including a horizontally extending stop arm normally urged outwardly in the path of the outwardly moving door by rotation of the stop arm down an inclined guide urging the stop arm in an outwardly extending position in the path of the door.
Inventors
- 👤 G Bridges
- 👤 F Adler
- 👤 J Bailey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 09:51
CPC Classifications
B; B61; B61D; B61D19/00; B61D19/003; B61D19/005; B61D19/007
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
194 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door positioning means comprising: a downward depending latch arm being pivotal about a generally horizontal axis on the door means and movable from an open to catch position, positioning catch means being mounted on the lower part of the side of the car below the door means between the intermediate portion and the end portion of the car and in the path of the latch arm for engagement therewith, biasing means urging said latch arm into engagement with the catch means, said biasing means being between the door means and the upper part of the latch arm and pivot means connecting the door means with the latch arm being between the place of engagement of biasing means with the door means and the lower part of the latch arm, and said catch means comprising a stop block having latch engaging surface limiting movement of the latch arm in one direction, said latch arm having its lower end part being engageable with said surface for holding the door in a certain position.
Claim 2
Dependent Claim
194 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door positioning means comprising: a downward depending latch arm being pivotal about a generally horizontal axis on the door means and movable from an open to catch position, positioning catch means being mounted on the lower part of the side of the car below the door means between the intermediate portion and the end portion of the car and in the path of the latch arm for engagement therewith, biasing means urging said latch arm into engagement with the catch means, said biasing means being between the door means and the upper part of the latch arm and pivot means connecting the door means with the latch arm being between the place of engagement of biasing means with the door means and the lower part of the latch arm, and said catch means comprising a stop block having latch engaging surface limiting movement of the latch arm in one direction, said latch arm having its lower end part being engageable with said surface for holding the door in a certain position.
Claim 3
Dependent Claim
38 words
The invention according to claim 1, and said stop block having a chamfered surface aiding movement of the latch arm over and past the stop block attendant to permitting movement of the latch arm in the opposite direction.
Claim 4
Dependent Claim
47 words
The invention according to claim 1, and said catch means comprising a pair of longitudinally spaced stop blocks with a latch arm receiving recess between them, said latch arm having its lower end part being engageable with said recess for holding the door in a certain position.
Claim 5
Dependent Claim
33 words
The invention according to claim 1, and said door means having longitudinally spaced vertically extending reinforcement members, one on each side of the latch arm for reinforcing the arm against longitudinal horizontal loads.
Claim 6
Dependent Claim
132 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door stop structure comprising: a door stop means being pivotally mounted on the lower part of the car side at the end of the car and having an arm portion swingable into the path of movement of the door means, said door stop structure including a journal means having an upwardly facing surface means supporting said stop means, said surface means presenting an upwardly sloped arcuate helical path, said stop means having downwardly facing edge portion, the edge portion defining a downwardly sloping arcuate path complementally engaging with the path of the surface means in biasingly moving the arm portion downwardly and outwardly into the path of door movement.
Claim 7
Dependent Claim
132 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door stop structure comprising: a door stop means being pivotally mounted on the lower part of the car side at the end of the car and having an arm portion swingable into the path of movement of the door means, said door stop structure including a journal means having an upwardly facing surface means supporting said stop means, said surface means presenting an upwardly sloped arcuate helical path, said stop means having downwardly facing edge portion, the edge portion defining a downwardly sloping arcuate path complementally engaging with the path of the surface means in biasingly moving the arm portion downwardly and outwardly into the path of door movement.
Claim 8
Dependent Claim
47 words
The invention according to claim 1, and said surface means and journal means being out of register with one another in the door unobstructing position of the door means where arm portion must be held at the upper portion of the surface means of the journal means.
Claim 9
Dependent Claim
47 words
The invention according to claim 6, and ladder means at the end of the car, said stop means being adjacent the ladder means between the ladder means and the intermediate portion of the car, said stop means preventing movement of the door Means past the ladder means.
Claim 10
Dependent Claim
92 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door stop structure comprising: a door stop means being pivotally mounted on the lower part of the car side at the end of the car and having an arm portion swingable into the path of movement of the door means, and biasing means disposed between the door means and one end of the arm portion urging the other end of the arm portion into the path of door movement.
Claim 11
Dependent Claim
92 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door stop structure comprising: a door stop means being pivotally mounted on the lower part of the car side at the end of the car and having an arm portion swingable into the path of movement of the door means, and biasing means disposed between the door means and one end of the arm portion urging the other end of the arm portion into the path of door movement.
Claim 12
Dependent Claim
13 words
The invention according to claim 8, and said biasing means comprising spring means.
Claim 13
Dependent Claim
135 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, stop structure comprising: a vertical pivot member, upper and lower journals supporting the pivot member, a stop arm member having a tubular part rotatable on said pivot member in a generally horizontal position between inward unobstructing door position and an outward door obstructing position in the path of movement of the door means, the stop arm member having a horizontal arm part projecting out from the tubular part, the lower journal having an arcuate upwardly sloped bearing for said tubular part and said tubular part having a lower arcuate surface engaging with said sloped bearing whereby said arm part is rotated outwardly and downwardly by gravity attendant to obstructing movement of the door.
Claim 14
Dependent Claim
135 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, stop structure comprising: a vertical pivot member, upper and lower journals supporting the pivot member, a stop arm member having a tubular part rotatable on said pivot member in a generally horizontal position between inward unobstructing door position and an outward door obstructing position in the path of movement of the door means, the stop arm member having a horizontal arm part projecting out from the tubular part, the lower journal having an arcuate upwardly sloped bearing for said tubular part and said tubular part having a lower arcuate surface engaging with said sloped bearing whereby said arm part is rotated outwardly and downwardly by gravity attendant to obstructing movement of the door.
Claim 15
Dependent Claim
133 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door positioning means comprising: a downward depending latch arm being pivotal about a generally horizontal axis on the door means and movable from an open to catch position, positioning catch means being mounted on the lower part of the side of the car below the door means between the intermediate portion and the end of the car and in the path of the latch arm for engagement therewith, and car door stop structure comprising a door stop means being pivotally mounted on the lower part of the car side at the end of the car and having an arm portion swingable into the path of movement of the door means.
Claim 16
Dependent Claim
133 words
In a railroad car having sliding side door means movable between an intermediate car portion and the end portion of the car, car door positioning means comprising: a downward depending latch arm being pivotal about a generally horizontal axis on the door means and movable from an open to catch position, positioning catch means being mounted on the lower part of the side of the car below the door means between the intermediate portion and the end of the car and in the path of the latch arm for engagement therewith, and car door stop structure comprising a door stop means being pivotally mounted on the lower part of the car side at the end of the car and having an arm portion swingable into the path of movement of the door means.
Claim 17
Dependent Claim
174 words
In a railroad box car, a pair of door means and car side means on each side of the car, the door means of each pair of door means being movable toward and away from one another attendant to closing and opening the doorway of its respective side of the car, door position latch arm means being pivotally mounted on each door means, position catch means for each door means being mounted on the car side means at various positions along each half length of the car for engaging the door position latch arm means in one of a plurality of closed to open positions, and end stop structure at each end of each side of the car for limiting movement of the respective door means beyond its respective end of the car and including stop means pivotally biased on the car side means to a door engaging position for engagement with a respective door means and further including journal means being fixedly mounted on the car side means for supporting said stop means.
Claim 18
Dependent Claim
174 words
In a railroad box car, a pair of door means and car side means on each side of the car, the door means of each pair of door means being movable toward and away from one another attendant to closing and opening the doorway of its respective side of the car, door position latch arm means being pivotally mounted on each door means, position catch means for each door means being mounted on the car side means at various positions along each half length of the car for engaging the door position latch arm means in one of a plurality of closed to open positions, and end stop structure at each end of each side of the car for limiting movement of the respective door means beyond its respective end of the car and including stop means pivotally biased on the car side means to a door engaging position for engagement with a respective door means and further including journal means being fixedly mounted on the car side means for supporting said stop means.
Claim 19
Dependent Claim
77 words
The invention according to claim 12, and said journal means having an upwardly sloped curving upwardly facing supporting surface and said stop means having a stop arm pivoted about a vertical surface of the stop structure and having a downwardly facing downwardly sloping curving edge surface complementally registerable with the supporting surface of the journal means whereby the stop arm is disposed to ride down the journal surface and swing outwardly to engage the respective door means.
References Cited (Backward Citations)
US3190239A
Cited
US3265015A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |