Manhole cover lift
AssigneeIndustrial Magnetics, Inc.
InventorPeter Friedrich
Life of this patent
Estimating the term…
Abstract
An apparatus for moving a manhole cover comprising a lever having a first lever arm pivotally connected to a second lever arm by a hinge for movement between a collapsed position, wherein the first lever arm is substantially parallel to the second lever arm, and a plurality of operative positions, wherein the first lever arm extends at a non-parallel angle with respect to the second lever arm. A linkage is connected to an engaging end of the lever, and at least one magnet is connected to the linkage and engageable with the manhole cover.
Claims20
An apparatus for moving a manhole cover, comprising:
- a lever having a first lever arm pivotally connected to a second lever arm by a hinge for movement between a collapsed position, wherein the first lever arm is substantially parallel to the second lever arm, and a plurality of operative positions, wherein the first lever arm extends at a non-parallel angle with respect to the second lever arm;
- a locking member configured to restrain pivotal movement of the first lever arm with respect to the second lever arm in each of the operative positions;
- a linkage connected to an engaging end of the lever;
- and
- at least one magnet connected to the linkage and engageable with the manhole cover.
An apparatus for moving a manhole cover, comprising:
- a first lever arm having a fulcrum end and a handle end;
- a second lever arm having a fulcrum end and an engaging end;
- a hinge pivotally connected to the fulcrum end of the first lever arm and rigidly connected to the fulcrum end of the second lever arm for pivoting the first lever arm with respect to the second lever arm between a collapsed position, wherein the first lever arm is substantially parallel to the second lever arm, and a plurality of operative positions, wherein the first lever arm extends at a non-parallel angle with respect to the second lever arm;
- a locking member engageable with the hinge and engageable with the first lever arm for restraining pivotal movement of the first lever arm with respect to the second lever arm in each of the operative positions;
- a linkage connected to the engaging end of the second lever arm;
- and
- at least a first magnet connected to the linkage and engageable with the manhole cover.
An apparatus for moving a manhole cover, comprising:
- a first lever arm having a fulcrum end and a handle end;
- a second lever arm having a fulcrum end and an engaging end;
- a first hinge plate and a second hinge plate, the first and second hinge plates pivotally connected to the fulcrum end of the first lever arm and rigidly connected to the fulcrum end of the second lever arm such that the first and second hinge plates are substantially parallel and disposed on opposite sides of the first and second lever arms;
- a locking member engageable with the first and second hinge plates and engageable with the first lever arm for restraining pivotal movement of the first lever arm with respect to the second lever arm in a collapsed position, wherein the first lever arm is substantially parallel to the second lever arm, and a plurality of operative positions, wherein the first lever arm extends at a non-parallel angle with respect to the second lever arm;
- a linkage connected to the engaging end of the second lever arm;
- and
- at least a first magnet connected to the linkage and engageable with the manhole cover.
Dependencies are inferred from the claim text.