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US 4,787,770 AGranted
Locking device for air hose coupling devices of tractor trailers
OwnerBuford Lewisinventor
Life of this patent
Estimating the term…
Abstract
A tractor-trailer coupling safety device includes a housing mountable about the curved medial area of a pair of joined coupling elements and presenting opposed inwardly directed projections serving to contain and prevent the members from separating from the housing while allowing normal angular relative displacement between the joined coupling elements.
Claims6
A securing device for restraining the movement of a pair of joined couplings, said joined couplings forming a pair of circular surfaces which are constrained within said securing device, comprising:
- housing means including a base and a pair of opposed side walls extending upwardly from said base;
- each of said side walls having a pair of vertically disposed, inwardly directed projections, said pair of projections on each said side wall laterally spaced apart from one another a distance less than the diameter of said circular surfaces of said joined couplings, each said projection on one said side wall spaced fron one said projection on the other one said side wall a distance less than the diameter of said circular surfaces of said joined couplings, and said projections defining a cavity therebetween whereby, when said joined couplings are positioned within said cavity of said housing means said projections limit the extent to which said joined couplings may move relative to each other and relative to said housing means.
Dependencies are inferred from the claim text.