Electro mechanical operated bollard
OwnerUri Eshel, David Heverinventors
Life of this patent
Estimating the term…
Abstract
According to an aspect of some embodiments of the present invention there is provided a piston mounted on and fixedly fastened to a ball screw nut, the nut threaded onto a ball screw. By mechanically rotating the piston and preventing the ball screw from rotating, the balls screw nut rotates, thereby raising or lowering the ball screw, thereby raising or lowering the piston, thereby raising or lowering a casing, for example a bollard, mounted on the piston. The casing may be raised or lowered by attaching a handle to the piston and rotating the handle.
Claims20
A mechanical actuator for raising and lowering comprising:
- a vertical screw;
- a nut threaded onto a vertical screw;
- a casing rotationally engaged with said nut, said casing prevented from rotating;
- a first torque source rotationally engaged to said screw and said casing for rotating said screw with respect to said casing while said nut is rotationally engaged to the casing thereby raising and lowering said nut;
- a brake for rotationally engaging said vertical screw to said casing;
- a bearing reversibly engageable between said casing and said nut for providing rotational disengagement between said casing and said nut;
- and
- a second torque source external to said casing configured for applying rotational force to said nut while said nut is rotationally disengaged from the casing and the screw is rotationally engaged to the casing thereby causing said nut to rotate on said screw, raising and lowering said nut.
A system for rotational disengagement of a casing and a vertical actuator comprising:
- a bearing comprising an axially rotatable mechanism connecting between a distal portion and a proximal portion of said bearing;
- a hollow conduit through a complete axial length of said bearing,
- wherein said proximal portion of said bearing is reversibly attachable to a conduit in a head of the casing, the casing resting on the vertical actuator, said distal portion of the bearing extending within said casing and disengaging between said casing and said actuator, allowing independent axial rotation of said actuator and said casing.
A method of using a mechanical actuator comprising:
- threading a nut onto a vertically oriented screw;
- vertically and rotationally engaging said nut to a casing;
- preventing said screw from rotating;
- rotationally disengaging said nut from said casing with a bearing;
- and
- applying a rotational force to said nut, causing said nut to rotate on said screw, raising or lowering said nut and said casing according to a direction of said nut rotation.
Dependencies are inferred from the claim text.