Did You Know...
...that Thomas Edison's patent application on his phonograph was approved by the Patent Office in just seven weeks? In contrast, it took Gordon Gould, the inventor of the laser, 30 years to obtain his patent -- finally awarded in 1988!
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| Number | Title | Issue Date |
| 5137298 | Fifth wheel locking device A fifth wheel for an over the road tractor having a locking bolt that may be cocked so as to latch and unlatch respecting movement to engage a king pin retaining jaw.... | 08/11/1992 |
| 5120080 | Trailer hitch A trailer hitch for attaching the forward end of a trailer to the rear end of a vehicle comprising a hitch pin support attachable to the forward end of the trailer and being provided with a downwardly projecting cylindrical hitch pin having a circular met... | 06/09/1992 |
| 5028067 | Automatic fifth wheel safety lock device An automatic fifth wheel having a power operated jaw unlocking mechanism for non-highway use and a manual safety lock operative to immobilize the automatic unlocking mechanism so as to also enable safe over the road operation.... | 07/02/1991 |
| 5000472 | Kingpin assembly An improved kingpin includes a shaft pivotally secured within a bearing and mounted within a trailer, the kingpin being positioned in downward extension therefrom for secured engagement within a conventional fifth-wheel. Also included are couplers for aut... | 03/19/1991 |
| 4946183 | Retractable fifth wheel pull handle A pull handle for a fifth wheel utilizes a sliding connection to the operating handle of the locking jaw of the fifth wheel. A retractor spring biases the pull handle inwardly along the sliding connection such that the pull handle assumes a position which... | 08/07/1990 |
| 4928987 | Fifth wheel coupling A fifth wheel coupling for connection of a semitrailer to a tractor unit is disclosed in which a pair of symmetrical, swivel-articulated closing jaws having semicircular recesses for grasping the king pin have a split bearing comprising an outer bearing h... | 05/29/1990 |
| 4907815 | Fifth wheel coupling A fifth wheel coupling for connecting a semitrailer to a towing vehicle, which provides two swivel-articulated closing jaws with semicircular clearances for grasping a semitrailer king pin, and means for opening and closing the jaws which provide a hydrau... | 03/13/1990 |
| 4871182 | Fifth wheel unlocking and safety latch device A fifth wheel for an over the road tractor having an operating rod for the locking mechanism which requires only longitudinal and rotary motion thus facilitating operation thereof in the space between tractor frame and trailer and permitting that space to... | 10/03/1989 |
| 4826199 | Fifth wheel hitch A hitch adapted to be installed in the bed of a pickup truck and adapted to interlock with the kingpin of a fifth wheel trailer in order to couple the trailer to the truck. The hitch includes a pivoted latching plate for securing the kingpin, a reciprocat... | 05/02/1989 |
| 4659101 | Fifth wheel Disclosed herein is a fifth wheel hitch having a set of jaws removably retained in a pocket on the underside of the bearing plate, replaceable by like jaws or jaws accommodating a different size kingpin. The hitch can be of forged aluminum, for on-highway... | 04/21/1987 |
| 4566715 | Fifth wheel Disclosed herein is a fifth wheel hitch having a set of jaws removably retained in a pocket on the underside of the bearing plate, replaceable by like jaws or jaws accommodating a different size kingpin. The hitch can be of forged aluminum, for on-highway... | 01/28/1986 |
| 4549745 | Fifth wheel coupler A fifth wheel coupler having a jaw which is positively driven by a mechanism in response to the movement of a king pin in a coupling direction. The jaw and the mechanism are yieldably connected so as to permit the mechanism to be operated by the oncoming ... | 10/29/1985 |
| 4477100 | Fifth wheel coupling apparatus Fifth wheel coupling apparatus including a trailer receiving plate mountable on a vehicle chassis and defining a receiving slot for accepting a trailer pin, a pin locking mechanism mounted onto the plate and comprising a generally stationary portion and a... | 10/16/1984 |
| 4455036 | King pin for tractor trailer fifth wheel coupling A king pin for a tractor trailer coupling is disclosed. The king pin is substantially conventional except that the lower flange thereof, which is presently standardized to have less diameter than the upper part of the king pin, is made predeterminedly lar... | 06/19/1984 |
| 4447070 | Fifth wheel A fifth wheel provided on a tractor and adapted to be connected to a king pin fixed to a trailer. The fifth wheel comprises a base plate provided with a slot for receiving the king pin, a stationary lock fixed to the portion of the base plate near the ter... | 05/08/1984 |
| 4413943 | Method and apparatus for loading and unloading a lengthy object from a transport vehicle To unload a lengthy object from a transport trailer, the rear of the trailer is supported by legs and the bogie wheels at the rear are shifted fowardly. As they reach the front of the trailer, they are automatically coupled to the tractor and the tractor ... | 11/08/1983 |
| 4394030 | King pin connecting mechanism A connecting mechanism for connecting a king pin fixed to a trailer to a fifth wheel mounted on a tractor. The connecting mechanism has a box structure in which major parts for connecting the king pin are mounted pivotally. The box structure is secured de... | 07/19/1983 |
| 4227713 | Trailer hitch latching assembly A trailer hitch latching assembly which employs the use of a housing which has an access opening to accommodate a trailer hitch. Extending across the opening and attached to the housing and pivotly attached to the housing is a latch plate. The latch plate... | 10/14/1980 |
| 4208062 | Lightweight fifth wheel mechanism A fifth wheel mechanism is fabricated from lightweight aluminum in a high strength box configuration. Locking jaws are spring urged toward the king pin receiving opening and are held open by a clip which is removed as the king pin is inserted into the kin... | 06/17/1980 |
| 4140328 | Adjustment and release mechanism for wedge locking mechanisms of fifth wheels A fifth wheel of the kind having a king pin jaw and locking wedge is provided with means accessible from the outside of the fifth wheel to free the wedge in the event it becomes impossible to move the same with the usual operating handle. The member for m... | 02/20/1979 |
| 3963265 | Anti-jackknife mechanism Anti-jackknife mechanism for a fifth wheel coupler between a towing tractor and a towed trailer, including a vertically shiftable stop member engageable with abutment elements on opposite sides of the coupler kingpin, the stop member being tripped into op... | 06/15/1976 |
