Rolling door winch apparatus
OwnerMichael W. Blockinventor
Life of this patent
Estimating the term…
Abstract
Winch apparatus for raising and holding a rolling steel door includes a wheeled base with telescoping members extending upwardly from the base. A hand cranked winch raises and lowers the telescoping members, while a reversible electric motor is used to power a separate winch for raising and lowering a load secured to an arm extending outwardly from an innermost telescoping member. The arm is disposed against a building when the apparatus is in position to raise the rolling steel door for its installation.
Claims19
Winch apparatus for supporting an element adjacent to an opening in a wall comprising in combination:
- base means for providing support;
- a fixed tube secured to the base means and having a bottom end and a top end;
- tubular means telescoping within the fixed tube;
- first winch means for moving the tubular means relative to the fixed tube;
- an arm secured to the tubular means and extending outwardly therefrom;
- and
- second winch means secured to the base below the bottom end of the fixed tube and including a cable extending through the fixed tube and the tubular means to the arm for raising and holding the element for installation.
Winch apparatus for lifting and holding a rolling door adjacent to an opening in a wall comprising in combination:
- a base;
- a fixed tube secured to the base and including an open bottom and an open top;
- a first movable tube telescopingly disposed in the fixed tube;
- a second movable tube telescopingly disposed in the first movable tube;
- first winch means;
- including cable means secured to the fixed tube and to the first and second movable tubes for raising and lowering the first and second movable tubes relative to the fixed tube;
- an arm secured to the second movable tube and extending outwardly from the second movable tube, including an outer end remote from the second movable tube and disposed against the wall for support;
- second winch means secured to the base and extending to the arm, including
- a pulley secured to the arm between the outer end and the second movable tube, and
- a cable disposed over the pulley for raising and holding the rolling door adjacent to the opening in the wall.
Dependencies are inferred from the claim text.