Seamless Hoist
AssigneeSavage Universal Corporation
InventorBo Christensen
Life of this patent
Estimating the term…
Abstract
The invention provides a hoist mechanism for a backdrop as used in the photographic setting. The hoist uses two vertical channels, each having and upper and a lower pull around which a belt is attached. A bracket, secured to the belt, is used to secure a roller of the backdrop thereto. A connecting rod, secured to the lower pullies of the vertical channels, is used to keep the two belts operating in concert. A hand crank, secured to the connecting rod, permits the operator to move the two brackets up/down which moves the a roller having the backdrop in like fashion.
Claims19
A hoist mechanism comprising:
- a) A first vertical channel having,
- 1) a first upper pulley located proximate to a top of the first vertical channel,
- 2) a first lower pulley located proximate to a bottom of the first vertical channel,
- 3) a first belt mechanism engaging with the first upper pulley and the first lower pulley, and,
- 4) a first bracket adapted to receive a roller, said first bracket secured to the first belt mechanism;
- b) A second vertical channel having,
- 1) a second upper pulley located proximate to a top of the second vertical channel,
- 2) a second lower pulley located proximate to a bottom of the second vertical channel,
- 3) a second belt mechanism engaging with the second upper pulley and the second lower pulley, and,
- 4) a second bracket adapted to receive a roller, said second bracket secured to the second belt mechanism;
- c) A connecting rod secured to the first lower pulley and the second lower pulley;
- and,
- d) A hand crank adapted to selectively rotate the connecting rod.
A hoist mechanism comprising:
- a) A first and a second vertical channel, each vertical channel having,
- 1) An upper pulley located proximate to a top of the vertical channel,
- 2) a lower pulley located below the upper pulley of the vertical channel,
- 3) a belt mechanism engaging with the first upper pulley and the first lower pulley, and,
- 4) a bracket adapted to receive a roller, said bracket secured to the belt mechanism;
- b) A connecting rod secured to the lower pulley of the first vertical channel and the lower pulley of the second vertical channel;
- and,
- c) A hand crank adapted to selectively rotate the connecting rod.
A hoist mechanism for a backdrop comprising:
- 1) A first and a second vertical channel, each having,
- a) An upper pulley located proximate to a top of the vertical channel,
- b) a lower pulley located below the upper pulley,
- c) a first belt mechanism engaging with the upper pulley and the lower pulley, and,
- d) a bracket adapted to receive a roller, said bracket secured to the belt mechanism;
- 2) A connecting rod secured to the lower pulley of the first vertical channel and the lower pulley of the second vertical channel;
- 3) A hand crank adapted to selectively rotate the connecting rod;
- and,
- 4) a first removable roller extending from the bracket of the first vertical channel to the bracket of the second vertical channel, said removable roller having a first dispensable backdrop thereon.
The hoist mechanism for a backdrop wherein the hand crank includes:
- a) A first hand crank pulley secured to one end of the connecting rod;
- b) A second hand crank pulley;
- c) A handle secured to the second hand crank pulley;
- and,
- d) A hand crank belt engaging the first hand crank pulley and the second hand crank pulley.
Dependencies are inferred from the claim text.