Railroad tie
OwnerRoy R. Pryor, Harold A. Pryorinventors
Life of this patent
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Abstract
An improved railroad tie member is formed of two wooden half-ties which are secured together with one or more reverse threaded bolts arranged in parallel with the tracks. The bolts are preferably inserted in the tie halves whereby the bolts may be turned to resecure the two halves while the tie assembly is installed in the track.
Claims11
An improved fastening device for securing two timbers or the like together to form a single strength member, comprising
- a hollow bolt means having external oppositely-directed threads on each end and a non-threaded center section adapted to receive and rotatably engage a turning means inserted therein through one of said ends of said bolt means,
- said bolt means further being resiliently compressible to be inserted into a pre-drilled hole in one of said timbers smaller in diameter than the normal diameter of said bolt means.
An improved fastening device for locking together two wooden timbers or the like, comprising
- a tubular member formed of metal and having two externally-threaded end portions separated by a non-threaded center section having an internal socket-like configuration,
- said tubular member being longitudinally split and further provided with a resiliently squeezable character, whereby said threaded end portions may be inserted into pre-drilled holes in said timbers smaller than the normal diameter of said threaded end portions.
An improved fastener for securing two timbers and the like together to form a strength member, comprising
- a compressible tubular bolt member having a divided sidewall and threads externally located on each end and oppositely directed for engaging and drawing together said timbers upon rotation of said bolt member therein,
- said bolt member further being resiliently compressible upon rotation in one direction in said timbers and resiliently expandable upon rotation in the opposite direction therein.
Dependencies are inferred from the claim text.