Bumper mounted vehicle obstacle detector

Claim 1

A vehicle mounted obstacle detector to provide positive warning of the close approach of the vehicle to obstacles comprising: a resilient cylindrical probe for contacting obstacles, of selected length rounded on one end and with an attached disc on the opposite end, a follower housing shaped as a hollow cylindrical element with a mounting flange at one end and having exterior threads, a probe cap with a centered hole through which said cylindrical probe passes and having an internal recess into which said probe disc fits loosely to permit the displacement of said disc when said probe encounters an obstacle, said probe cap being provided with internal threads to engage the external threads on said follower housing and closing one end of said follower housing when threaded thereon, a probe follower formed as a cup shaped piece with a recessed interior column and having a closed end bearing against said probe disc to transmit any displacement of said probe disc, a follower push rod attached at one end in said probe follower column recess and provided with a flange at the opposite end, a circular spring backing plate with a centered hole through which said push rod passes, said backing plate being forced fitted into and closing the other end of said follower housing, a positioning spring placed between the interior base of said probe follower, surrounding said probe follower internal column, and compressed against said spring backing plate, a cubical detector housing having a removable access cover forming one side thereof and with a circular opening in the opposite side permitting the passage of said follower housing through said detector housing, an internally threaded locking ring engaging said exterior threads of said follower housing and securing said follower housing mounting flange against the interior face of said detector housing, said locking ring being provided with an external seal skirt to overlap the threaded end of said probe cup, a detector housing seal positioned between said locking ring and the adjacent detector housing exterior face, a normally open electrical control switch mounted within said detector housing and positioned to be in cooperative alignment with said follower push rod flange for closure by movement of said push rod, means for electrically connecting said control switch in parallel connection in the vehicle horn circuitry for sounding the vehicle horn when said switch is closed, and means for mounting said detector housing on the vehicle.