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Hatch Cover For A Covered Railroad Car Having Removable Closure and Screen Member

a technology for railroad cars and hatch covers, which is applied to railway roofs, railway components, transportation and packaging, etc., can solve the problems of reducing the efficiency of vacuum unloading process and risking damage to the car structure, and achieve the effect of facilitating the opening and closing of the hatch cover

Inactive Publication Date: 2009-06-25
STANRAIL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention allows for the use of a single hatch cover for both vented and unvented service on a covered hopper railroad car by simply changing the frame of the hatch cover assembly. The frame is made of a flexible material that retains its flexibility and resiliency under variable weather conditions. The hand operated latch provided in the invention eliminates the need for a hold down arm for the hatch cover and can be installed on hatch coamings of various manufacturers. The latch securely holds the hatch cover in its closed position in spite of wide temperature variations and operating conditions experienced by a covered hopper car during its travels."

Problems solved by technology

Failure to vent the top of the compartment will reduce the efficiency of the vacuum unloading process and may even risk damage to the car structure.

Method used

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  • Hatch Cover For A Covered Railroad Car Having Removable Closure and Screen Member
  • Hatch Cover For A Covered Railroad Car Having Removable Closure and Screen Member
  • Hatch Cover For A Covered Railroad Car Having Removable Closure and Screen Member

Examples

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Embodiment Construction

[0022]FIG. 1 of the drawings shows a hatch cover 11 of this invention which can be used to close or uncover an opening 13 which is surrounded by a coaming 15 of a hopper compartment such as the type found on railroad hopper cars. As is conventional, an annular lip 17 is formed on the top of the coaming. While the coaming shown in the drawings has a turned over flange or annular lip 17, not all coamings include such an annular lip. The hatch cover of this invention may be used with convention coamings of all shapes and types. Also shown in FIG. 1 are brackets 19 which attach to the hatch cover 11 and receive a pivot pin 21. As shown in FIG. 2, additional brackets 23 attached to the coaming 15 also engage and support the pivot pin 21. Brackets 25 which are most clearly shown in FIG. 2 also attach to the coaming 15 and support a spring anchor pin 27 which can be best seen in FIGS. 9 and 10 of the drawings.

[0023]As is most clearly shown in FIGS. 1, 2, and 3 of the drawings, the hatch co...

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PUM

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Abstract

A hatch cover for hopper compartment opening with a coaming surrounding the opening. The hatch cover includes a peripheral skirt with a portion of the skirt spaced outwardly of the coaming when the hatch cover is closed to allow air flow from the exterior of the hatch cover to the opening. A frame has a center portion and an annular gasket which seats on the coaming with the center portion over the opening. The center portion of the frame may be a screen or may be solid. An annular ring is attached to the underside of the hatch cover. A press fit attachment is provided between the frame and the annular to permit attachment and removal of the frame from the annular ring. A latch mechanism is provided for the hatch cover. A spring anchor pin is supported on coaming brackets and a latching pin is supported on the hatch cover. A latch mechanism includes a handle having a pair of uprights located at one end of the handle. An outwardly opening slot is formed in each upright with the slots aligned with each other to be removeably engagable and pivot on the hatch cover latching pin. The mechanism also includes a compressibly loaded helical spring connected between the latch handle and the coaming spring anchor.

Description

BACKGROUND OF THE INVENTION[0001]Railroad hopper cars carrying bulk particulate material, such as grain, plastic pellets or powered or granular products, are typically unloaded by applying a vacuum conveying line to an outlet gate positioned at the bottom of each car compartment. The primary airflow for the vacuum conveying line is obtained from the exterior of the railroad car. That it, the exhaust air for unloading is not drawn from the car compartment through the particulate matter but is drawn from outside the railroad car. Accordingly, the top of the car compartment must be vented to compensate for the particulate material drawn out the bottom of the compartment. Failure to vent the top of the compartment will reduce the efficiency of the vacuum unloading process and may even risk damage to the car structure. Manufacturers have responded to this problem by providing hatch covers that have filtered vents, however, for some types of materials, for example, materials used or inten...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B61D39/00
CPCB61D17/16
Inventor SCHULTZ, FRANCIS R.SCHULTZ, LAWRENCE L.
Owner STANRAIL CORP
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