ApplicationNo. 744255 filed on 08/13/1991
US Classes:411/400, Hook head, e.g., J-bolt, etc.294/82.1, HOISTLINE OR GRAB HOOK411/384, Axially adjustable411/397Threadedly attached to shank
ExaminersPrimary: Wilson, Neill R.
Attorney, Agent or Firm
International ClassesF16B 023/00
AbstractA lifting eyebolt assembly for engagement between a workpiece to be lifted and a lifting device includes a load-bearing ring that is connected to the workpiece by a threaded fastener. The load-bearing ring includes a base portion having a threaded central cavity. The fastener includes a threaded head portion for engaging the threaded cavity of the base portion of the load-bearing ring. The fastener also includes a threaded shaft portion for engaging a threaded bore within the workpiece. In one aspect of the invention, an access hole is provided between the eye portion of the load-bearing ring and the central cavity. In addition, the head portion of the fastener includes a recess disposed beneath the access hole to permit engagement with an allen wrench passing through the access hole. In one embodiment of the invention, the workpiece includes a recess around the threaded bore within which the head portion of the fastener is received when connected to the load-bearing ring. In another embodiment, the workpiece surface remains smooth, and a washer is disposed between the head portion of the fastener and the surface of the workpiece. In both embodiments, the load-bearing ring is threaded onto the threaded portion of the fastener until the base portion of the ring contacts either the workpiece or the washer, after which the load-bearing ring is backed off a partial or complete turn.
Field of SearchMultipart
And discrete manual actuating means
Both ends threaded
Separate head element
Threadedly attached to shank
Hook head, e.g., J-bolt, etc.
Elongated head, e.g., hanger bolt, etc.
Revolvably mounted disc shaped gate
HOISTLINE OR GRAB HOOK