Class 280/509 - Biased open

Subclass of Class 280 - Land vehicles
Definition: Devices in which one of the coupling members includes a
No. of patents: 31
Last issue date: 10/14/2008

Number	Title	Issue Date
7434826	Self-locking scissor coupler for attaching a trailer to a trailer hitch ball A self-locking scissor coupler, provision for holding guide poles, for attaching a trailer to a trailer hitch ball. The coupler includes a body, a pair of movable jaws, and a bail. The body attaches to the trailer. The pair of movable jaws are pivotally mounted to t...	10/14/2008
7416206	Drawbar hammer strap pin lock A drawbar hammer strap assembly design achieves a low profile, and prevents rotation of the drawbar and of the cross pin. The drawbar hammer strap assembly includes a drawbar, a hammer strap member attached to the drawbar, a drawbar pin mountable to drawbar and hamm...	08/26/2008
7378013	Gooseneck trailer coupler A coupler comprised of a coupler housing having a first opening formed therein. The opening has a concave cavity. A cylindrical socket is formed within the housing. A second opening in the housing communicates with the cylindrical socket. A lock ring is provided, th...	05/27/2008
7370853	Vibration isolating bushing with embedded angular position sensor A bushing assembly adapted for application in vehicle suspension systems includes an outer, generally cylindrical bushing member, an inner generally cylindrical bushing member arranged concentrically within the outer member. The two bushing members are interconnecte...	05/13/2008
7360756	Vibration isolating bushing with embedded speed/position sensor A bushing assembly adapted for application in vehicle suspension systems includes an embedded position sensor and an embedded speed sensor. ...	04/22/2008
7225883	Device for coupling implement to agricultural tractor The invention relates to a device for a coupling an agricultural implement to an agricultural tractor, in which the operation to release the coupling between the agricultural implement and the agricultural tractor can be easily implemented. When the coupling ...	06/05/2007
7192047	Trailer coupling for a vehicle A trailer coupling (1) for a vehicle, in particular a tractor, has a coupling element (6). This coupling element (6) can grasp a drawbar (4) of a trailer and is displaceable between a coupling position and a release position. The coupling...	03/20/2007
7131658	Trailer hitch guide The trailer hitch (10) includes a guide bar (25) threaded about the stem (20) of the hitch ball (18). An alignment plate (45) that is rigidly mounted to the lower wall of the trailer tongue (34) has converging guide surfaces...	11/07/2006
6976695	Trailer hitch coupler lock assembly The present invention provides a trailer coupler lock assembly for securing a coupler whether attached to or detached from a hitch ball of a trailer or vehicle, the coupler attachable to the hitch ball supported by one of the trailer or vehicle, the locking assembly...	12/20/2005
6851698	Coupling device A coupling member 2 is brought into a mouth 23 to contact a camming surface 61 of an engagement member 60. The member 60 rotates clockwise to bring the securement means 50 up to retain the coupling member. A camming surface ...	02/08/2005
6390314	Automatic trolley clamp lock The present invention provides systems and methods that reduce the number of mis-routed trolleys in an AGV system. The invention provides a solenoid driven automatic coupling for coupling a trolley to an AGV. When an AGV arrives at a particular preprogram...	05/21/2002
5921699	Draw pin assembly A draw pin assembly includes a hammer strap that mounts on the drawbar and a draw pin that extends through aligned draw pin holes in the hammer strap and drawbar. A latch mechanism supports the draw pin in a retracted position while a trigger in the hitch...	07/13/1999
5769559	Automatically setting draw pin assembly A draw pin assembly includes a hammer strap that mounts on the drawbar and a draw pin that extends through aligned draw pin holes in the hammer strap and drawbar. A latch mechanism supports the draw pin in a retracted position while a trigger in the hitch...	06/23/1998
5573263	Automatic trailer hitch lock A self-latching trailer hitch for securing and releasing a hitch ball attached to a towing vehicle. The hitch maintains itself in a ball receiving position and when placed over the hitch ball, automatically locks into a ball securement position without th...	11/12/1996
5403029	Mechanism for latching a gooseneck hitch to a trailer platform A gooseneck hitch is latched to a trailer platform by a pin which may be shifted linearly to an unlatched position against the bias of a spring so as to permit removal of the gooseneck from the platform. A first detent unit holds the latch pin in its unla...	04/04/1995
5257796	Integrated cam lever/handle lock fifth wheel A fifth wheel hitch has a single swinging jaw, i.e., pivotal lock element, a unique cam arm, a locking plunger, a release arm, and release handle that all specially function in an interrelated manner to clearly indicate the locked or unlocked condition of...	11/02/1993
5244047	Apparatus for coupling implements to a farm tractor An apparatus for coupling a tractor's three point hitch system to a ground working implement comprises a U-shaped frame mountable at one end to the hitch system and having rearwardly open grooves formed in its other end. An automatically locking and quick...	09/14/1993
5031927	Semi-automatic attach device for mounting snowplows A semi-automatic attach-detach snowplow mounting comprising two mounting mechanisms each comprising a pivotally mounted U-shaped latch member which cooperates with a slot to captively hold a mounting pin, the latch member being locked in place by a lockin...	07/16/1991
4968054	Coupling The present invention relates to a hitching device with automatic coupling, applicable in particular to the joining of automotive tractors to their trailers. This device consists essentially of a fork, in which the pulling member arranged on the tractor e...	11/06/1990
4962945	Easy hitching mechanism The present invention relates to a hitching device designed to be used to detachably connect two vehicles together. The hitching mechanism includes two jaws which may pivot with respect to one another in a controlled manner by virtue of intermeshing geari...	10/16/1990
4958848	Pintle type trailer coupling A pintle hook type tractor-trailer coupling component for heavy duty use. Multiple detent and safety hook means are provided for maintaining it securely, but releasably, in its operative position, coupled to the eye component of a pulling truck or tractor...	09/25/1990
4793626	Trailer hitch The trailer hitch comprises a channel-shaped body having a bottom wall containing therein two longitudinally offset holes and an elongated slot located forwardly of said holes. Associated with the slot is a trigger mechanism that can be rotated into a per...	12/27/1988
4792151	Self-aligning, self-locking and self-leveling trailer hitch assembly A trailer hitch comprising a housing mountable on the vehicle, a ramp sloping downwardly and rearwardly from the housing away from the vehicle, and two laterally opposed pivotable jaws having recesses which when closed define a socket or pocket in which t...	12/20/1988
4545596	Trailer coupler A coupler for a trailer reach ball, comprising a housing to be mounted on a vehicle, a pair of pivotally mounted coupling plates; mounted within the housing and extending out of the housing; the plates pivot within a limited arc on counter rotating axis; ...	10/08/1985
4408778	Automatically connecting hitch An automatic latching device for connecting a tractor drawbar to a wagon or implement being towed in which connecting jaws are adapted to be closed around a pin in the tongue of the pulled device. The device actuating the closing includes a tapered pin ad...	10/11/1983
4362459	System for storing and transporting guided missiles and similar flying bodies System for storing and transporting guided missiles and similar flying bodies includes a storage building and movable storage structures for supporting multiple guided missiles. The storage building is sized so that a row of the storage structures can be ...	12/07/1982
4176853	Quick disconnect trailer hitch A quick disconnect trailer hitch for connecting a trailer vehicle to a tractor vehicle wherein a pair of pivotally connected jaws are slidably mounted in a vertically disposed tube connected to the trailer vehicle draw bar. A spring is mounted in the tube...	12/04/1979
4133553	Self-closing trailer coupler A coupler for a trailer and the like, the coupler having a body and cap hinged together at a front portion and closeable along parting faces and having an internal cavity formed by the body and the cap for the ball which is conventionally secured to eithe...	01/09/1979
4108464	Coupling hook for a three-point attachment of a tractor A coupling hook has a latch element extending from a pocket through a passage to block a coupling pin in the hook opening in the locked position. The latch element is arcuate and has opposed curvilinear surfaces one of which is engageable with a fulcrum i...	08/22/1978
4071263	Coupling hook for a three-point connection on a tractor A coupling hook for lockingly engaging a coupling pin on an implement or the like has a pocket having a slot in which a pivot element is slidably received and an operating lever is pivotally mounted to the pivot element. A latch is pivotally connected to ...	01/31/1978
4014562	Coupling hook for a three-point connection on a tractor A coupling hook for lockingly engaging a coupling pin on an implement or the like has a pocket within which is pivoted an operating lever and a latch has one end pivotally connected to the operating lever and its other end projecting toward the jaw openin...	03/29/1977

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Class 280/509 - Biased open