Safety lock device for screw fasteners
OwnerCharles G. Dauwalterinventor
Life of this patent
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Abstract
A safety lock device when combined with at least one pair of spaced screw fasteners, which by observation indicates tightness of the fasteners or looseness of either or both fastener, and additionally to limit counter rotation of either fastener to a small faction of a turn, characterized by a pair of replaceable caps anchored to each fastener, and a loose lanyard extending between the caps when the fasteners are in tightened condition, also any multiplicity of caps tethered by lanyards.
Claims29
In combination with screw fasteners threaded to screw members, a safety lock device for indicating looseness of a screw fastener and for stopping counter rotation of said screw fasteners from a tightened condition thereof, and including;
- a pair of two like next adjacent screw fasteners threaded to a pair of said screw members spaced a fixed distance,
- a pair of two caps carried by and each with means for attachment to one of said pair of like next adjacent screw fastener threaded to said member for the caps to rotate therewith respectively,
- and a flexible lanyard extending between the two caps and secured by anchor means to extend from the peripheries of said two caps in directions of pull in tension against counter rotation of either of said two caps,
- the lanyard being longer than the distance between the anchor means of said two caps so as to be loose between said pair of two caps for indicating when the screw fasteners are in tightened conditions, and to be taut bewteen said pair of two caps for indicating that either or both screw fasteners are in a loose condition, and for limiting either or both screw fasteners to a part turn only in counter rotation.
In combination with lug-nuts threaded to wheel studs, a safety lock device for indicating looseness of a lug-nut threaded onto a wheel stud and for stopping counter rotation of lug-nuts from a tightened condition thereof, and including;
- a pair of two like next adjacent lug-nuts threaded onto a pair of studs spaced at a fixed distance,
- a pair of two caps carried by and each with means for attachment to one of said pair of like next adjacent lug-nuts on said pair of studs for the caps to rotate therewith respectively,
- and a flexible lanyard extending between the two caps and secured by anchor means to extend from the peripheries of said two caps in directions of pull in tension against counter rotation of either of said two caps,
- the lanyard being longer than the distance between the anchor means at said two caps so as to be loose between said pair of two caps for indicating that the lug-nuts are in tightened conditions, and to be taut between said pair of two caps for indicating that either or both lug-nuts are in a loose condition, and for limiting either or both lug-nuts to a part turn only in counter rotation.
In combination with threaded nuts and studs, a safety lock device for indicating looseness of a nut threaded onto a stud and for stopping counter rotation of said nut from a tightened condition on said stud, and including;
- a pair of two like next adjacent threaded nuts threaded onto a pair of studs spaced at a fixed distance,
- a pair of two caps carried by and each with mans for coaxially aligned attachment to one of said pair of like next adjacent threaded nuts on said pair of studs for the caps to rotate therewith,
- and a flexible lanyard extending between the two caps and secured by anchor means to extend from the peripheries of said two caps in directions to pull in tension against counter rotation of either of said two caps,
- the lanyard being longer than the distance between the anchor means at said two caps so as to be loose between said pair of two caps for indicating that the nuts are in tightened conditions, and to be taut between the two caps for indicating that either or both nuts are in a loose condition, and for limiting either or both nuts to a part turn only in counter rotation.
Dependencies are inferred from the claim text.