The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 13, 1985
Filed:
Feb. 16, 1983
Mark P Scott, Boiling Springs, PA (US);
Keystone Industries, Inc., Rolling Meadows, IL (US);
Abstract
This disclosure relates to a frame adapted to be attached to a hopper car, a door plate slidably mounted on the frame, and an automatically engageable lock mounted on the frame adjacent the door plate and operable to hold the door plate closed when engaged. The lock includes pivotably mounted parts including a latch. One of the parts, which may be the latch, has a seal hole therein, and this seal hole is aligned with another seal hole in the frame when the lock is engaged. The seal holes are spaced from an adjacent edge of the frame a distance which is related to the size of the seal band such that there is little slack in the seal when the parts are coupled together. Further, the parts are shaped to require a substantial turning movement of the latch before the lock is disengaged, and the latch is unable to turn this distance because of the small amount of slack in the seal. Consequently the lock is prevented from accidentally disengaging when the seal is in place.