초록 ▼

A generally circular cover for closing a hatch opening in a railroad car hopper is connected to a diametral support bar for limited pivotal movement to provide uniform gasket loading between the cover member and the hatch coaming. One end of the support bar is hinged to the hopper roof and the oppos

A generally circular cover for closing a hatch opening in a railroad car hopper is connected to a diametral support bar for limited pivotal movement to provide uniform gasket loading between the cover member and the hatch coaming. One end of the support bar is hinged to the hopper roof and the opposite end includes a cam surface and laterally projecting retaining pins for engagement with a latch member. The latch member has a somewhat channel shaped portion pivotally connected to a link which, in turn is also pivotally secured to the hopper roof. The link includes opposed trunnion portions which are engageable with the cam surface to forciby engage the support bar to hold the hatch cover closed. The latch member includes open ended slots which are engageable with the retaining pins in such a way that the latch member will not disengage from the support bar when the latch member is swung to the release position if fluid pressure within the car hopper is sufficient to force the cover toward an open position.

대표청구항 ▼

A cover for closure over a hatch opening in a railway car hopper means or the like, comprising; a cover member adapted to be closed over means forming a hatch opening in said hopper means; hinge means connected to said cover member for moving said cover member between an open position and a closed p

A cover for closure over a hatch opening in a railway car hopper means or the like, comprising; a cover member adapted to be closed over means forming a hatch opening in said hopper means; hinge means connected to said cover member for moving said cover member between an open position and a closed position in sealed engagement with said means forming said hatch opening; closure latch means for locking said cover member in said closed position and including a latch member operable to be moved in stages from a cover locking position to a first position permitting only partial opening movement of said cover and from said first position to a second position releasing said cover member for movement to a full open position; link means operable when said latch member is in said first position and fluid pressure is being exerted against the inside of said cover member to provide an interlock preventing movement of said latch member to said second position until after the fluid pressure has been relieved; said latch member is pivotally connected to said link means and said link means includes a first pivot member connected to means fixed to said hopper means, and said latch member includes means cooperable with means connected to said cover member for limiting the movement of said cover member to said first position and for moving said cover to said closed position; said latch member and said means connected to said cover member include cooperating slot means and pin means formed on said latch member and said means connected to said cover member for moving said cover member to a closed and latched position and for retaining said cover member engaged with said latch member in said first position partially opened to relieve said fluid pressure; and said latch member includes a surface engageable with said link means to limit pivotal movement of said latch member so as to maintain said pin means in said slot means until said cover member moves from said partially open first position toward said closed position in response to relief of fluid pressure in said hopper means.