Patent ID: 7597272

Claim:
A boom arrangement for use in a car wash comprising: a mounting member for attachment to a support; a flexible hose for receiving a wash-spray device on one end of the hose and a water supply device at the other end of the hose, a boom for supporting a substantially horizontal portion of the hose, a rotatable swivel coupling carried on the mounting member for supporting an inner end of the boom so that the horizontal portion of the hose can rotate about a vertical axis in a generally horizontal plane with the remainder of the hose extending downwardly from the horizontal plane at an outer end of the boom; and a pivot coupling allowing pivotal movement of the boom about a generally horizontal axis transverse to the boom such that an outer end of the horizontal portion can pivot downwardly out of the horizontal plane when the hose is pulled, the pivot coupling comprising: a bracket mounted on the rotatable coupling and extending outwardly from the vertical axis; a pivot support at a bottom of the mounting bracket defining the horizontal axis; a pivot member on the boom carried on the pivot support such that the boom can pivot about the horizontal axis; the bracket defining a first spring engaging portion located substantially vertically above the pivot axis; the pivot member including a second spring engaging portion; a support rod connected between and extending through both the first and second spring engaging portions; a first compression spring extending between the first spring engaging portion and a first abutment at a first end of the rod; and a second compression spring extending between the second spring engaging portion and a second abutment at a second end of the rod; such that both springs are compressed as the pivot member pivots relative to the bracket.