초록 ▼

A lid lifter mount is installed on the hinge pin of a conventional manway lid, and has a compression spring assembly engaging a lever which is also installed on the hinge pin. The lever has a bar engaging a lid hinge arm. A spring force adjustment screw connected to the mount enables adjustment of t

A lid lifter mount is installed on the hinge pin of a conventional manway lid, and has a compression spring assembly engaging a lever which is also installed on the hinge pin. The lever has a bar engaging a lid hinge arm. A spring force adjustment screw connected to the mount enables adjustment of the amount of lift assist the bar applies to the hinge arm by cam action against the arm as the operator lifts the lid. Two embodiments are shown for attachment to two types of lid hinges.

대표청구항 ▼

1. A chamber closure assembly, including:a manway; a lid pivotally mounted to the manway by a hinge pin; and a lid lifter assembly, including: a mount having a first locating surface to be mounted on the hinge pin, and the mount having a second locating surface to bear on an outer peripheral surface

1. A chamber closure assembly, including:a manway; a lid pivotally mounted to the manway by a hinge pin; and a lid lifter assembly, including: a mount having a first locating surface to be mounted on the hinge pin, and the mount having a second locating surface to bear on an outer peripheral surface of the manway without being securely affixed thereto for locating the mount relative to the manway; a cam member having a first surface to be mounted on the hinge pin, whereby the cam member is rockable on the hinge pin; and the cam member having a second surface to bear on a outer peripheral surface of the lid without being securely affixed thereto; and the cam member having a third surface to receive and bear against a biasing device; said biasing device engaging the mount and the third surface of the cam member to bias the cam member in a direction to urge the second surface of the cam member to bear on said outer peripheral surface of the lid.