Adjustable list pin box

Claim 2

An adjustable list pin box for interconnecting a tractor and a trailer, or the like, comprising: a. an upper member rigidly secured on the tongue portion of a trailer and having a conduit member with an essentially rectangular cross section extending downward therefrom, b. a stanchion member having a cross-sectionally rectangular portion slidably mounted in said conduit member, said stanchion member has means to mount a shaft on the lower end portion thereof such that a shaft when mounted will be in position substantially aligning with the longitudinal axis of said trailer, and c. a hitch engaging member having a shaft mounting means on an upper portion thereof and mounting a shaft, said shaft being mounted with said means to mount a shaft on said stanchion member, said hitch engaging member being constructed and adapted to in use pivot on an axis substantially aligned with the longitudinal axis of said trailer.

Claim 3

The adjustable list pin box of claim 1 wherein said hitch engaging member comprises a shoe on the lower portion thereof, and a coupler pin depending from said shoe.

Claim 4

The adjustable list pin box of claim 2 wherein said shoe comprises a substantially circular planform having an upturned forward portion.

Claim 5

The adjustable list pin box of claim 3, wherein said shaft mounting means comprises a conduit means attached to said shoe for receiving said shaft therethrough, and said means to mount a shaft aligning with said conduit means to mount said shaft through said means to mount a shaft and through said conduit means for pivoting said hitch engaging member on said longitudinal axis relative to said stanchion member.

Claim 6

The adjustable list pin box of claim 4 wherein said upper member comprises a structure defining a plate, said conduit member integrally bound to said plate, and at least one part of apertures positioned in said conduit member.

Claim 7

The adjustable list pin box of claim 5 wherein said structure additionally comprises a pair of ends each portraying a pentahydronal having two faces delineating a trapezoid, said pentahydronals integrally binding to said conduit member, and said plate comprising as an integral part thereof one of said two faces of each of said pentahydronals.

Claim 8

The adjustable list pin box of claim 6 wherein said stanchion member comprises a structure defining a plurality of openings, said plurality of openings being paired in generally horizontal registry and collimating with said apertures for inserting an axis pin therethrough to secure said upper member to said stanchion member and for adjusting the distance of said upper member from said hitch engaging member.

Claim 9

The adjustable list pin box of claim 7, wherein said shaft is positioned over a center portion of said coupler pin, said shaft mounting means comprises a pair of brace members attaching to said shoe and a conduit connected to said brace members, said last named conduit receiving and supporting said shaft and mounting over a center portion of said hitch engaging member, said means to moUnt a shaft includes a means for engaging opposite end portions of said shaft, and said stanchion member additionally comprises a pair of downwardly extending flange portions which includes said means for engaging.

Claim 10

In a tractor having a fifth wheel trailer hitch means and a trailer having a tongue portion adapted for use with said fifth wheel trailer hitch means, an adjustable list pin box therein and therewith, comprising in combination: a. an upper member rigidly secured on the tongue portion of said trailer and having a conduit member with an essentially rectangular cross section extending downwardly therefrom, b. a stanchion member having a cross-sectionally rectangular portion slidably mounted in said conduit member said stanchion member has means to mount a shaft on the lower end portion thereof such that a shaft when mounted will be in position substantially aligning with the longitudinal axis of said trailer, and c. a hitch engaging member having a shaft mounting means on an upper portion thereof and mounting a shaft, said shaft being mounted with said means to mount a shaft on said stanchion member, said hitch engaging member being constructed and adapted to in use pivot on an axis substantially aligned with the longitudinal axis of said trailer.

Claim 11

In a tractor having a fifth wheel trailer hitch means and a trailer having a tongue portion adapted for use with said fifth wheel trailer hitch means, an adjustable list pin box therein and therewith, comprising in combination: a. an upper member rigidly secured on the tongue portion of said trailer and having a conduit member with an essentially rectangular cross section extending downwardly therefrom, b. a stanchion member having a cross-sectionally rectangular portion slidably mounted in said conduit member said stanchion member has means to mount a shaft on the lower end portion thereof such that a shaft when mounted will be in position substantially aligning with the longitudinal axis of said trailer, and c. a hitch engaging member having a shaft mounting means on an upper portion thereof and mounting a shaft, said shaft being mounted with said means to mount a shaft on said stanchion member, said hitch engaging member being constructed and adapted to in use pivot on an axis substantially aligned with the longitudinal axis of said trailer.

Claim 12

The adjustable list pin box of claim 9 wherein said hitch engaging member comprises a shoe on the lower portion thereof, and a coupler pin depending from said shoe.

Claim 13

The adjustable list pin box of claim 10 wherein said shoe comprises a substantially circular planform having an upturned forward portion.

Claim 14

The adjustable list pin box of claim 11 wherein said shaft mounting means comprising a conduit means attached to said shoe for receiving said shaft therethrough, and means to mount includes a shaft being aligning with said conduit means to mount said shaft through said means to mount a shaft and through said conduit means for pivoting said hitch engaging member on said longitudinal axis relative to said stanchion member.

Claim 15

The adjustable list pin box of claim 12 wherein said upper member comprises a structure defining a plate, said conduit member integrally bound to said plate, and at least one pair of apertures positioned in said conduit member.

Claim 16

The adjustable list pin box of claim 13 wherein said structure additionally comprises a pair of ends each portraying a pentahydronal having two faces delineating a trapezoid, said pentahydronals integrally binding to said conduit member, and said plate comprising as an integral part thereof one of said two faces of each of said pentahydronals.

Claim 17

The adjustable list pin box of claim 14 wherein said stanchion member comprises a structure defining a plurality of openings, said plurality of openings being paired in generally horizontal registry and collimating with said apertures for inserting an axis pin therethrough to secure said upper member to said stanchion member and for adjusting the distance of said upper member from said hitch engaging member.

Claim 18

The adjustable list pin box of claim 15 wherein said shaft is positioned over a center portion of said coupler pin, said shaft mounting means comprises a pair of brace members attaching to said shoe and a conduit connected to said brace members, said last named conduit receiving and supporting said shaft and mounting over a center portion of said hitch engaging member, said means to mount a shaft includes a means for engaging opposite end portions of said shaft, and said stanchion member additionally comprises a pair of downwardly extending flange portions which includes said means for engaging.