초록 ▼

A band (30) is buckled around a pole (50). A hanger arm (18) has a top end attached to the band (30) at an attachment point (44), and has a bottom end with a load hook (20). A high-friction cam surface (24) is formed on the hanger arm (18). The relative positions of the cam (24), the band attachment

A band (30) is buckled around a pole (50). A hanger arm (18) has a top end attached to the band (30) at an attachment point (44), and has a bottom end with a load hook (20). A high-friction cam surface (24) is formed on the hanger arm (18). The relative positions of the cam (24), the band attachment point (44), and the load hook (20) cause the band attachment point (44, 46) to move away from the pole (50) as the hanger arm is loaded, tightening the band (30) on the pole (50). This automatically adjusts the hoop tension in the encircling band (30) depending on the arm loading (52).

대표청구항 ▼

I claim: 1. An accessory hanger for mounting on a vertical pole, comprising: a hanger arm comprising a top end and a bottom end, the bottom end comprising a load hook; a high friction cam surface on the hanger arm intermediate the top and bottom ends of the hanger arm and offset from a line between

I claim: 1. An accessory hanger for mounting on a vertical pole, comprising: a hanger arm comprising a top end and a bottom end, the bottom end comprising a load hook; a high friction cam surface on the hanger arm intermediate the top and bottom ends of the hanger arm and offset from a line between the top and bottom ends of the hanger arm; a band for encircling a pole, the band comprising first and second ends; first and second parts of a connecting device on the respective first and second ends of the band to releasably buckle the two ends of the band together; and the top end of the hanger arm attached to the band at an attachment point; wherein a downward movement of the load hook causes the cam surface to roll against the pole and cause a radially outward movement of the attachment point relative to the pole. 2. The accessory hanger of claim 1 wherein: the band comprises a strap of an elastic material; the hanger arm is formed generally in an S shape, with the bottom of the S comprising the load hook, and the top of the S comprising a curved cam portion; the top end of the hanger arm is inserted through a hole in the band; and the hanger arm and band are coated with a rubbery compound that provides the high friction cam surface on the cam portion of the hanger arm, and fixes the top end of the hanger arm to the band. 3. The accessory hanger of claim 1 further comprising a plurality of similar hanger arms similarly attached to the band in a sequence along the band. 4. An accessory hanger for mounting on a vertical pole, comprising: a band comprising first and second ends, each end having respective first and second parts of a buckling device that releasably connect the ends of the band together; a lever arm comprising a top end and a bottom end, the bottom end of the lever arm comprising a load hook; a high friction cam surface attached to the lever arm at an intermediate position between the top and bottom ends of the lever arm and offset from a line between the top and bottom ends of the lever arm; the top end of the lever arm attached to the band at a given attachment point; the relative positions of the cam surface, the band attachment point, and the load hook are configured such that when the band is buckled around a vertical pole the lever arm operates between an unloaded position and a loaded position, and movement of the lever arm from the unloaded position to the loaded position causes the given attachment point to move away from the pole, tightening the band on the pole; wherein the band comprises a strap of an elastic material; the lever arm is formed generally in an S shape, with the bottom of the S comprising the load hook, and the top of the S comprising a curved cam portion; the top of the S is inserted through a hole in the band; and the lever arm and band are coated with a rubbery compound that provides the high friction cam surface on the cam portion of the lever arm, and fixes the top end of the lever arm to the band. 5. The accessory hanger of claim 4 further comprising a plurality of similar lever arms similarly attached to the band in a sequence along the band. 6. An accessory hanger for mounting on a vertical pole, comprising: a band of an elastic material comprising first and second ends, each end having respective first and second parts of a buckling device that releasably connect the ends of the band together; a lever arm comprising a top end and a bottom end, the bottom end of the lever arm comprising a load hook; a high-friction cam surface attached to the lever arm at an intermediate position between the top and bottom ends of the lever arm and offset from a line between the top and bottom ends of the lever arm; the top end of the lever arm attached to the band at a given attachment point; the relative positions of the cam surface, the band attachment point, and the load hook are configured such that when the band is buckled around a vertical pole the lever arm operates between an unloaded position and a loaded position, and movement of the lever arm from the unloaded position to the loaded position causes the given attachment point to move away from the pole, tightening the band on the pole; wherein the lever arm is formed generally in an S shape, with the bottom of the S comprising the load hook, and the top of the S comprising a curved cam portion; the top of the S is inserted through a hole in the band; and the lever arm and the band are coated with a rubbery compound that provides the high friction cam surface on the cam portion of the lever arm, and fixes the top end of the lever arm to the band.