Method and device for removal of vertical manway cover
OwnerTimothy Selbyinventor
Life of this patent
Estimating the term…
Abstract
A lift for maneuvering a heavy manway cover, the lift including a wheeled base and a generally horizontal arm connectable to the cover. A pair of spaced lifts connecting the arm to the base and a shaft rotatably held within the arm. A wheel crank connected to the shaft to rotate the shaft in a pivotable connection on the end of the shaft. Wherein the shaft having a first position wherein the cover is held against rotation and a second position wherein the weight of the cover allows the cover to pivot under the shaft while an axis of the cover rotates from being perpendicular to the arm to being parallel to the arm.
Claims20
A lift for maneuvering a manway cover, the lift including:
- a base having a plurality of wheels;
- an arm adapted to connect to a manway cover;
- a pair of spaced actuators connecting said arm to said base;
- a shaft rotatably held within said arm;
- a crank connected to said shaft to rotate said shaft;
- a pivotable connection on an end of said shaft;
- wherein said shaft having a first position wherein said cover is held against rotation and, a second position wherein the weight of said cover allows said cover to pivot under said shaft.
A lift for maneuvering a load, the lift including:
- a wheeled base;
- an arm adapted to connect to a load;
- a pair of spaced actuators connecting said arm to said base;
- a joint rotatably held by said arm;
- a crank connected to said joint to rotate said joint;
- a pivotable connection on an end of said joint;
- wherein said joint having a first position wherein said load is held against rotation and, a second position wherein the weight of said load allows said load to pivot under said arm.
A lift for maneuvering a load, the lift including:
- a mobile base;
- an arm adapted to connect to a load;
- at least two actuators connecting said arm to said base;
- a joint rotatably held by said arm;
- a crank connected to said joint to rotate said joint;
- a pivotable connection on an end of said joint;
- wherein said joint having a first position wherein said load is held against rotation and, a second position wherein the weight of said load allows said load to pivot under said arm.
Dependencies are inferred from the claim text.