Abstract: A secondary lock assembly for a fifth wheel, where the fifth wheel includes a hitch plate with a rearward opening slot to receive a trailer kingpin and a transversely sliding primary locking member for retaining the kingpin within the slot. The assembly comprises a tie bar pivotally connected at its middle to the primary locking member and a transversely oriented pull bar pivotally connected at an inner end to the forward end of the tie bar. The pull bar comprises a rearward offset tab. A latch is pivotally connected roughly at the center of the latch to the forward end of the tie bar, and also pivotally connected at a point rearwardly and inwardly offset from the first pivoting connection to the offset tab. A detent extends from a transverse wall comprised in said hitch plate such that said detent lies in the same horizontal plane as said latch.

Abstract: An adjustable height fifth wheel hitch is provided. The fifth wheel hitch comprises a pedestal and a fifth wheel hitch assembly. The fifth wheel hitch assembly includes journal bearings which pivotally connect with risers of the pedestal. The risers of the pedestal include a plurality of openings located at different levels. The height of the fifth wheel assembly in relation to the tractor may be adjusted by aligning openings in the journal bearings with co-level openings in the risers and inserting a mounting pin through such openings.

Abstract: An adjustable height fifth wheel hitch is provided. The fifth wheel hitch comprises a pedestal and a fifth wheel hitch assembly. The fifth wheel hitch assembly includes journal bearings which pivotally connect with risers of the pedestal. The risers of the pedestal include a plurality of openings located at different levels. The height of the fifth wheel assembly in relation to the tractor may be adjusted by aligning openings in the journal bearings with co-level openings in the risers and inserting a mounting pin through such openings.

Abstract: A secondary lock assembly for a fifth wheel, where the fifth wheel includes a hitch plate with a rearward opening slot to receive a trailer kingpin and a transversely sliding primary locking member for retaining the kingpin within the slot. The assembly comprises a tie bar pivotally connected at its middle to the primary locking member and a transversely oriented pull bar pivotally connected at an inner end to the forward end of the tie bar. The pull bar comprises a rearward offset tab. A latch is pivotally connected roughly at the center of the latch to the forward end of the tie bar, and also pivotally connected at a point rearwardly and inwardly offset from the first pivoting connection to the offset tab. A detent extends from a transverse wall comprised in said hitch plate such that said detent lies in the same horizontal plane as said latch.

Abstract: A bracket assembly for an adjustable fifth wheel hitch is suitable for mounting to a slide rail assembly, which itself is mounted to parallel longitudinal truck frame members, where the slide rails have a generally t-shaped cross-section. The slide rail is comprised of a horizontal portion and a vertical portion, the vertical portion including a plurality of spaced-apart gaps. The bracket assembly comprises a bracket body with longitudinal disposed front and rear ends, with respect to the truck body, a longitudinal channel defined in the underside that extends from front and rear openings defined in the respective surfaces of the front and rear ends with a generally t-shaped cross-section to slidably receive said slide rail. The bracket body also has two spaced-apart transverse channels defined in the underside, perpendicular to the longitudinal channel. The transverse channels align with two of the space-apart gaps as the bracket body is slid along the slide rail.

Abstract: An integrated cross-member mount comprises an inter-frame mount seated within opposing longitudinal channels of parallel adjacent truck frame members and comprises a top surface within each lateral portion of which is defined a longitudinally-oriented row of spaced-apart, shaped apertures, and at least two substantially vertical flanges extending downward from the lateral periphery of the top surface that are dimensioned to be conforming to the inner surfaces of truck frame members. Also included is a sliding pedestal having lateral skids seated upon respective portions of rows of spaced-apart apertures and extending into vertical gaps between the top surface of the mount and the truck frame member. Each skid includes a plurality of spaced-apart, shaped skid apertures that can align with a corresponding plurality of shaped apertures within the top surface of the mount.

Abstract: A removable locking mechanism for a fifth wheel hitch is provided which includes a mounting plate removably attachable within a fifth wheel chassis formed to support a fifth wheel hitch plate that has an aperture in the load surface thereof. The mounting plate is formed with a u-shaped throat dimensioned to receive a trailer kingpin and a top surface configured to be co-planar with the fifth wheel hitch plate load surface when seated within the chassis. A locking mechanism for retaining the kingpin against said closed end of the throat is mounted to the underside of the mounting plate and includes a cam arm; and a bumper arm pivotally attached to the cam arm configured to engage a bumper stop formed in the mounting plate underside; a sliding jaw member slidably mounted to the cam arm; and a secondary lock member for preventing unintended disengagement of the lock mechanism.

Abstract: An integrated cross-member mount comprises an inter-frame mount seated within opposing longitudinal channels of parallel adjacent truck frame members and comprises a top surface within each lateral portion of which is defined a longitudinally-oriented row of spaced-apart, shaped apertures, and at least two substantially vertical flanges extending downward from the lateral periphery of the top surface that are dimensioned to be conforming to the inner surfaces of truck frame members. Also included is a sliding pedestal having lateral skids seated upon respective portions of rows of spaced-apart apertures and extending into vertical gaps between the top surface of the mount and the truck frame member. Each skid includes a plurality of spaced-apart, shaped skid apertures that can align with a corresponding plurality of shaped apertures within the top surface of the mount.

Abstract: A removable locking mechanism for a fifth wheel hitch is provided which includes a mounting plate removably attachable within a fifth wheel chassis formed to support a fifth wheel hitch plate that has an aperture in the load surface thereof. The mounting plate is formed with a u-shaped throat dimensioned to receive a trailer kingpin and a top surface configured to be co-planar with the fifth wheel hitch plate load surface when seated within the chassis. A locking mechanism for retaining the kingpin against said closed end of the throat is mounted to the underside of the mounting plate and includes a cam arm; and a bumper arm pivotally attached to the cam arm configured to engage a bumper stop formed in the mounting plate underside; a sliding jaw member slidably mounted to the cam arm; and a secondary lock member for preventing unintended disengagement of the lock mechanism.

Abstract: A fifth wheel assembly comprises a fifth wheel having a plurality of journal bearings extending generally downward from its underside, and an “I-shaped” transverse beam member for mounting the assembly to a truck frame. The beam member is dimensioned to span across parallel longitudinal truck frame members and it includes mounting flanges extending generally downward from either lateral side where the mounting flanges have a plurality of apertures for receiving suitable fasteners inserted therein for mounting said beam member to the truck frame members. The transverse member also includes a plurality of pivot bearing pairs to receive the journal bearings of the fifth wheel which is coupled thereto by a trunnion.

Abstract: In a fifth wheel hitch, a locking mechanism for retaining a trailer kingpin within a fifth wheel slot. The locking mechanism includes a jaw assembly comprised of two opposing jaw members pivotally attached at one end to the underside of the hitch plate, a longitudinally sliding cam interposed between the jaw members with a tip that contacts a bumper. The bumper is pivotally attached to tie bar that has its rear most end pivotally attached to the underside of the hitch plate. The mechanism also includes a wedge member and a secondary lock member pivotally attached thereto, where the lock member has a guide extension inserted through a guide hole in the tie bar. Rotation of the tie bar inward causes the wedge member and secondary lock to move inward until the wedge member is seated to the rear of the closed jaw assembly and the secondary lock rotates to engage a detent.

Abstract: A fifth wheel assembly comprises a fifth wheel having a plurality of journal bearings extending generally downward from its underside, and an “I-shaped” transverse beam member for mounting the assembly to a truck frame. The beam member is dimensioned to span across parallel longitudinal truck frame members and it includes mounting flanges extending generally downward from either lateral side where the mounting flanges have a plurality of apertures for receiving suitable fasteners inserted therein for mounting said beam member to the truck frame members. The transverse member also includes a plurality of pivot bearing pairs to receive the journal bearings of the fifth wheel which is coupled thereto by a trunnion.

Abstract: In a fifth wheel hitch, a locking mechanism for retaining a trailer kingpin within a fifth wheel slot. The locking mechanism includes a jaw assembly comprised of a cam arm pivotally attached at one end to the underside of the hitch plate, a bumper arm pivotally attached by one of its ends to the cam arm, a sliding jaw with a recess for receiving the kingpin shank, and a secondary lock member, pivotally attached at a point intermediate its two ends to the rear portion of the cam arm. The locking mechanism also includes a main spring to pull the free end of the cam arm toward a closed position. A release rod is coupled at one end to secondary lock member at an attachment point that is disposed away from the lock member's axis.

Abstract: A fifth wheel with a removable bearing plate includes a load structure comprising frame walls and inner bracing, and including a plurality of flanges, each of said plurality of flanges having an aperture disposed therethrough, said load structure also having at least two pivot bearings; and a bearing plate having a plurality of fasteners extending from an underside of said bearing plate disposed at locations corresponding to the disposition of said apertures configured to permit removable attachment of said bearing plate to said load structure and plurality of ridges disposed upon the underside to form a seat for said frame walls.

Abstract: A fifth wheel assembly comprises a fifth wheel having a plurality of journal bearings extending generally downward from its underside, and a transverse beam member for mounting the assembly to a truck frame. The beam member is dimensioned to span across parallel longitudinal truck frame members and it includes mounting flanges extending generally downward from either lateral side where the mounting flanges have a plurality of apertures for receiving suitable fasteners inserted therein for mounting said beam member to the truck frame members. The transverse member also includes a plurality of pivot bearing pairs to receive the journal bearings of the fifth wheel which is coupled thereto by a trunnion.

Abstract: A fifth wheel mounting pin riser adaptation is provided, said riser adaptation allowing a mounting pin to be easily extracted from a fifth wheel assembly.

Abstract: A fifth wheel mounting bracket is provided. Said mounting bracket allows for the transfer of the load placed on the hitch plate through the mounting pin rather than through its contact surface with the saddle bearing of the hitch plate.

Abstract: A stop block for preventing over travel of an adjustable fifth wheel hitch assemblies comprising a generally rectangular solid member having a double curve disposed in said member such that a long portion of said member is higher in elevation than a short portion of said member.

Abstract: A slide rail assembly for providing adjustable positions for fifth wheel hitches including a slide rail having feet extending downward from the underside of the slide rail, adjacent feet being separated by a detent for receiving a slide locking mechanism, each of the feet having a recesses located at the bottom inside corner of each foot, respecting the assembly. The slide rail also comprises teeth with gaps therebetween, where the gaps are vertically aligned with the recesses.