Railway rolling stock – Special car bodies – Sleeping
Patent
1976-03-01
1978-10-24
Makay, Albert J.
Railway rolling stock
Special car bodies
Sleeping
85 50R, 105460, 105461, 182194, 2482232, 248342, 285 4, 285370, 403 2, 403353, B61C 1704, B61D 2300, F16B 100, F16B 300
Patent
active
041214951
ABSTRACT:
An assembly is provided for blind hole mounting an external appurtenance including safety appliances such as ladder rungs, hand holds, and walkways on a railway freight car. One or more key hole slots are provided through the surface of the car where the external appurtenance is to be mounted. Each slot includes an enlarged bolt head receiving portion through which the head of a fastening bolt may be inserted and a key portion of smaller size forming a continuation of the slot into which the shank of the bolt may be slipped for retaining the fastening bolt in the slot. The relative dimensions of the bolt head and the bolt head receiving portion of the key hole slot are such that the bolt head can only pass through the bolt head receiving portion of the key hole slot when the bolt head is first inserted edgewise through the bolt head receiving portion and the bolt then rotated to a perpendicular position relatively to the key hole slot. The bolt shank has a movable retainer thereon of a size to cover a portion of the key hole slot and prevent the bolt from dropping through the blind hole both during insertion through the bolt head receiving portion of the key hole slot and during subsequent assembly of an appliance to the shank of the bolt. The shank portion includes threads or grooves to hold the retainer in place on the shank. A bolt fastener applied to the shank of the bolt retains the safety appliance on the shank of the bolt and compresses the retainer between the appliance and the surface of the car over the key hole slot. The bolt fastener may include a nut or a collar crimped or swaged in place. Caulking material may be applied to the retainer before the safety appliance is applied to the bolt shank to seal any portion of the slot not covered by the retainer.
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Malo Lowell L.
Zimmerle James R.
ACF Industries Incorporated
Beltran Howard
Cummings Henry W.
Makay Albert J.
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