US3800714A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Trough hatch locking device
Assignee: Pullman Standard Inc
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Filing: 1972-08-31
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Granted: 1974-04-02
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Expires: 1992-08-31
Abstract
Abstract A hatch cover locking device having a hinged strap pivotally attached to overlap the adjacent end portions of adjoining trough hatch covers and having a free end which is engaged by a locking bar which has a locking notch portion into which locking finger of a rotating lock bolt moves to restrain the locking bar in the latched position.
Inventors
- 👤 R Tuck
- 👤 H Aquino
- 👤 M Stark
- 👤 J Jones
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 09:07
CPC Classifications
B; B65; B65D; B65D90/00; B65D90/54; Y; Y10; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0997; Y10T292/20; Y10T292/202
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
231 words
A hopper hatch structure with a roof provided with a hatch opening surrounded by an upstanding coaming, and a pivoted hatch cover means mounted on said roof and rotatable to engage said coaming and close the hatch opening, the improvement comprising: a hinge strap supported adjacent said hatch and having contacting portions engaging the hatch cover means, and said hinge strap having a locking portion extension protruding outwardly of said coaming when said hinge strap is in the hatch contacting position; a locking bar positioned for rotational movement in a plane transverse to the rotation of the hinge strap and having a locked and unlocked position; said locking bar having a portion engageable with the hinge strap extension when the locking bar is in the locked position; latch mounting means attached to the hopper roof and being positioned below said hinge strap extension; a rotatable latching means supported on said latch mounting means and having a latching finger positioned above said hinge strap extension and rotatable in a horizontal plane about a vertical axis into a locking position in the path of rotation of the locking bar to thereby maintain the locking bar in the locked position; said latching means including stop means limiting movement of said latching finger about said vertical axis; and a guide bar spaced from said rotatable latching means to thereby form a locking bar receiving means.
Claim 2
Dependent Claim
231 words
A hopper hatch structure with a roof provided with a hatch opening surrounded by an upstanding coaming, and a pivoted hatch cover means mounted on said roof and rotatable to engage said coaming and close the hatch opening, the improvement comprising: a hinge strap supported adjacent said hatch and having contacting portions engaging the hatch cover means, and said hinge strap having a locking portion extension protruding outwardly of said coaming when said hinge strap is in the hatch contacting position; a locking bar positioned for rotational movement in a plane transverse to the rotation of the hinge strap and having a locked and unlocked position; said locking bar having a portion engageable with the hinge strap extension when the locking bar is in the locked position; latch mounting means attached to the hopper roof and being positioned below said hinge strap extension; a rotatable latching means supported on said latch mounting means and having a latching finger positioned above said hinge strap extension and rotatable in a horizontal plane about a vertical axis into a locking position in the path of rotation of the locking bar to thereby maintain the locking bar in the locked position; said latching means including stop means limiting movement of said latching finger about said vertical axis; and a guide bar spaced from said rotatable latching means to thereby form a locking bar receiving means.
Claim 3
Dependent Claim
65 words
The invention according to claim 1, and: said stop means including a threaded nut means on said latch mounting means; said rotatable latching means including a shank with a threaded portion whereby the shank threaded portion is insertable within the nut member to thereby provide means for spacing the latching finger above the mounting means and provide an adjustable locking point for the locking bar.
Claim 4
Dependent Claim
39 words
The invention according to claim 1, and: said locking bar including a sloped cam portion positioned to engage the latching finger and move same out of the locking position when the locking bar is lowered toward the locked position.
Claim 5
Dependent Claim
28 words
The invention according to claim 2, and: said latching finger positioned atop the shank and having a vertically extending tab portion to facilitate movement of the latching finger.
Claim 6
Dependent Claim
29 words
The invention according to claim 2, and: stop means fixedly attached to the shank of the rotatable locking means to thereby fix the locking point of the locking bar.
Claim 7
Dependent Claim
39 words
The invention according to claim 2, and: said lock mounting means having a top mounting plate portion abutting the locking bar when in the unlocked position to thereby space the locking bar above said roof in the unlocked position.
Claim 8
Dependent Claim
162 words
A railway hopper car having a roof structure with a continuous longitudinally positioned trough hatch covered by hinged hatch covers having adjacent intermediate end portions and having side and end portions extending downwardly, and the improvement comprising: a locking and sealing hinge strap positioned for independent transverse rotational hinged movement in a plane overlying the adjacent intermediate end portions of the hatch covers and said hinge strap also having an extension portion; a locking bar positioned adjacent the trough hatch and spaced above said roof by a mounting stand to thereby permit the locking bar to swing transversely to the rotation of the locking strap; a locking latch mounted on said stand and having a finger portion rotatable in a horizontal plane for locking engagement with the locking bar; and said locking bar including a sloped cam portion positioned to engage the latching finger and move same out of the locked position when the locking bar is lowered into the locked position.
Claim 9
Dependent Claim
162 words
A railway hopper car having a roof structure with a continuous longitudinally positioned trough hatch covered by hinged hatch covers having adjacent intermediate end portions and having side and end portions extending downwardly, and the improvement comprising: a locking and sealing hinge strap positioned for independent transverse rotational hinged movement in a plane overlying the adjacent intermediate end portions of the hatch covers and said hinge strap also having an extension portion; a locking bar positioned adjacent the trough hatch and spaced above said roof by a mounting stand to thereby permit the locking bar to swing transversely to the rotation of the locking strap; a locking latch mounted on said stand and having a finger portion rotatable in a horizontal plane for locking engagement with the locking bar; and said locking bar including a sloped cam portion positioned to engage the latching finger and move same out of the locked position when the locking bar is lowered into the locked position.
Claim 10
Dependent Claim
33 words
The invention according to claim 7, and: said locking bar having a notch portion for receiving the rotatable finger portion to thereby maintain lockIng engagement of the locking bar and the finger portion.
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) | 1977-04-01 | 1977-10-01 | 1978-04-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-01 | 1981-10-01 | 1982-04-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-01 | 1985-10-01 | 1986-04-02 | $7700.00 | Window Closed / Lapsed |