Telescoping mast assembly
First Claim
1. An extendible mast assembly comprising:
- a base member;
a base mast section pivotally coupled to the base member and pivoting along a path between a down position and an up position;
a drive motor assembly mounted to the base ember and coupled to alternatively push and pull said base mast section to pivotally drive the base mast section between said up and down positions;
an extendible mast section telescopically received within an axial bore of the base mast section and moving therewith between the up and down positions, the extendible mast section telescoping relative to the base mast section between a retracted position and an extended position and having an axial bore coaxial with the base mast section; and
wherein a space is defined between the extendible mast section and the base mast section and the assembly further comprises a cover for enclosing an upper end of the space, whereby isolating the coaxial bores of the extendible mast section and the base mast section from ambient elements.
1 Assignment
0 Petitions
Accused Products
Abstract
A telescoping mast assembly having a ball drive actuator drive system. A telescoping mast section is housed within a base mast section mounted to a base plate. The base mast section pivots about a pivot axis between a lowered, horizontal position and an upright, vertical position and includes an upper elongate body disposed an upper side of the pivot axis and a bottom end disposed on an opposite side of the pivot axis. A ball actuator drive includes an electrically powered motor that drives a ball screw reciprocally inward and outward along a linear stroke path. A remote end of the ball screw is attached to the bottom end of the base mast section and, by pushing and pulling the bottom end of the base mast section, pivots and maintains the base mast section to alternative positions between the fully raised and the fully lowered positions. A telescoping mast section is housed within the base mast section and telescopes between an extended position and a retracted position. A secondary ball screw actuator is housed within the base mast section and is coupled to drive the telescoping mast section between its extended and retracted positions.
-
Citations
22 Claims
-
1. An extendible mast assembly comprising:
-
a base member;
a base mast section pivotally coupled to the base member and pivoting along a path between a down position and an up position;
a drive motor assembly mounted to the base ember and coupled to alternatively push and pull said base mast section to pivotally drive the base mast section between said up and down positions;
an extendible mast section telescopically received within an axial bore of the base mast section and moving therewith between the up and down positions, the extendible mast section telescoping relative to the base mast section between a retracted position and an extended position and having an axial bore coaxial with the base mast section; and
wherein a space is defined between the extendible mast section and the base mast section and the assembly further comprises a cover for enclosing an upper end of the space, whereby isolating the coaxial bores of the extendible mast section and the base mast section from ambient elements.
-
-
2. An extendible mast assembly comprising:
-
a base member;
a base mast section pivotally coupled to the base member and pivoting along a path between a down position and an up position;
a drive motor assembly mounted to the base member and coupled to alternatively push and pull said base mast section to pivotally drive the base mast section between said up and down positions;
an extendible mast section telescopically received within an axial bore of the base mast section and moving therewith between the up and down positions, the extendible mast section telescoping relative to the base mast section between a retracted position and an extended position;
an extendible mast section drive motor mounted within the axial bore of the base mast section and coupled to push the extendible mast section into the extended position and pull the extendible mast section into the retracted position; and
wherein the extendible mast section drive motor comprises a ball drive actuator.- View Dependent Claims (3, 4)
-
-
5. An extendible mast assembly comprising:
-
a base member;
a base mast section pivotally coupled to the base member and pivoting along a path between a down position and an up position;
a first motor assembly mounted to the base member and coupled to alternatively move said base mast section between said up and down positions;
at least one extendible mast section telescopically received within an axial bore of said base mast section and moving therewith between said up and said down position, said extendible mast section having an axial bore in coaxial alignment with said base mast section axial bore; and
a second motor assembly mounted within said axial bore of said base mast section and coupled to extend said extendible mast section between an extended position and a retracted position. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. An extendible mast assembly comprising:
-
a base member;
a mast section pivotally coupled to the base member and pivoting along a path between a down position and an up position, the mast section having a central axial passageway and an access opening at a lower end communicating with said axial passageway;
a drive motor assembly mounted to the base member and coupled to pivotally drive the mast section between said up and down positions;
an electrical cable extending through the mast section access opening and along the axial passageway to create and electrical circuit to a top end of the mast section; and
an electrical device positioned along the electrical cable within the mast section passageway for breaking the electrical circuit between the top end of the mast section and the lower end of the mast section in the event of a current overload. - View Dependent Claims (19, 20, 21, 22)
-
Specification