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1. 发明公开

US20230294463A1 TRAILER DOLLY APPARATUS 审中-公开
公开(公告)号：US20230294463A1
公开(公告)日：2023-09-21
申请号：US18202034
申请日：2023-05-25
申请人： Randal D. Walton
发明人： Randal D. Walton
IPC分类号： B60D1/07 , B60D1/66
CPC分类号： B60D1/075 , B60D1/665
摘要： A load-bearing trailer dolly which connects a tongue-type boat, utility or other trailer to a towing tandem trailer and bears weight from the trailer during towing. The trailer dolly is characterized by an axle mounted on a pair of wheels. A dolly frame height-adjustable trailer hitch that receives a primary or a secondary trailer. The adjustable hitch on the trailer dolly allows horizontal leveling. A shock-absorbing spring is fitted between the axle mount and the dolly frame for cushioning the dolly frame on the axle mount as the trailer is towed behind the towing tandem trailer.

2. 发明授权

US11691680B2 Trailer dolly apparatus 有权
公开(公告)号：US11691680B2
公开(公告)日：2023-07-04
申请号：US16941110
申请日：2020-09-28
申请人： Randal D Walton
发明人： Randal D Walton
IPC分类号： B62D53/08 , B62D63/06 , B60D1/07
CPC分类号： B62D53/0864 , B60D1/075 , B62D63/065
摘要： A load-bearing trailer dolly which connects a tongue-type boat, utility or other trailer to a towing tandem trailer and bears weight from the trailer during towing. In a preferred embodiment, the trailer dolly is characterized by an axle mounted on a pair of wheels. A dolly frame height-adjustable trailer hitch centered coaxial above the axle axis and midway point framed dolly plate mount by operation of an adjustable sleeve reducer fastened by pinning and lock. Includes dual connecting adjustable height tongues for attachment to rear end trailer hitches on the tandem towing trailer at which a pair of hitch fasteners for engaging the trailer dolly tongues are attached to the rear of the tandem trailer. The adjustable tongue hitches on trailer dolly will give ability to horizontal level tandem dolly. A shock-absorbing spring is fitted between the axle mount and the dolly frame for cushioning the dolly frame on the axle mount as the trailer is towed behind the towing tandem trailer. In the industry of dollies, the car dolly has no shock-absorbing function, just square axle with hubs for wheels, axle is attached to car dolly frame. There is an option with shock-absorbing mechanism or s non shock-absorbing option.

3. 发明申请

US20220097782A1 Trailer Dolly Apparatus 有权
公开(公告)号：US20220097782A1
公开(公告)日：2022-03-31
申请号：US16941110
申请日：2020-09-28
申请人： Randal D. Walton
发明人： Randal D. Walton
IPC分类号： B62D53/08 , B60D1/07 , B62D63/06
摘要： A load-bearing trailer dolly which connects a tongue-type boat, utility or other trailer to a towing tandem trailer and bears weight from the trailer during towing. In a preferred embodiment, the trailer dolly is characterized by an axle mounted on a pair of wheels. A dolly frame height-adjustable trailer hitch centered coaxial above the axle axis and midway point framed dolly plate mount by operation of an adjustable sleeve reducer fastened by pinning and lock. Includes dual connecting adjustable height tongues for attachment to rear end trailer hitches on the tandem towing trailer at which a pair of hitch fasteners for engaging the trailer dolly tongues are attached to the rear of the tandem trailer. The adjustable tongue hitches on trailer dolly will give ability to horizontal level tandem dolly. A shock-absorbing spring is fitted between the axle mount and the dolly frame for cushioning the dolly frame on the axle mount as the trailer is towed behind the towing tandem trailer. In the industry of dollies, the car dolly has no shock-absorbing function, just square axle with hubs for wheels, axle is attached to car dolly frame. There is an option with shock-absorbing mechanism or s non shock-absorbing option.

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