公开(公告)号：US3551720A

公开(公告)日：1970-12-29

申请号：US3551720D

申请日：1969-01-28

Applicant: DORWIN K KILBOURN ,  TEDDY J PEACHER ,  RAYMOND F ASKEW ,  WILLIAM D FOSTER

Inventor： KILBOURN DORWIN K ,  PEACHER TEDDY J ,  ASKEW RAYMOND F ,  FOSTER WILLIAM D

IPC: H01J5/30 ,  H01J61/36 ,  H05B31/00

CPC classification number: H05B31/0021 ,  H01J5/30 ,  H01J61/36 ,  H01J2893/0045

公开(公告)号：US3605457A

公开(公告)日：1971-09-20

申请号：US3605457D

申请日：1970-04-23

Applicant: WILLIAM D FOSTER

Inventor： FOSTER WILLIAM D

IPC: B60D1/60 ,  E05B73/00

CPC classification number: B60D1/60 ,  Y10T70/40 ,  Y10T70/5009 ,  Y10T70/5982

Abstract: AN APPARATUS FOR PREVENTING ACCESS TO A TRAILER INCLUDING AN ENCLOSURE ABOUT THE END OF THE HITCH AND A SUBSTITUTE TOWING BALL CARRIED ON A WALL SEGMENT OF THE ENCLOSURE FOR INSERTION INTO THE BALL SOCKET OF THE HITCH. A WALL SEGMENT OF THE ENCLOSURE IS PIVOTALLY CONNECTED TO THE ENCLOSURE TO ALLOW INSERTION AND REMOVAL OF THE SUBSTITUTE BALL AND A CONCEALED LOCK IS PROVIDED TO RETAIN THE ENCLOSURE ABOUT THE HITCH.