Receptacles – Closures – Motor driven
Patent
1981-09-21
1982-12-28
Hall, George T.
Receptacles
Closures
Motor driven
220345, 220314, 220346, 40210, 49211, 49221, B65D 5500, B65D 4320
Patent
active
043657265
ABSTRACT:
A closure for a large sized opening in a pressure vessel has a lid longitudinally movable between an open covering position in which it is aligned with the opening but spaced apart from it, and perpendicularly displaceable between the covering position and sealing position in which it engages the sealing edge of the opening. The lid is moved by a hydraulic or pneumatic ram between the open and covering positions and is carried by rollers mounted on shafts affixed to the lid which run on longitudinal support surfaces. The shafts are rotatably mounted in bearings fixed to the lid and are coupled together for simultaneous rotation, while the rollers are eccentric relative to the bearings. The ram applies torque to the shafts in one sense during closing movement of the lid and in the opposite sense during opening movement of the lid. A follower member or members fixedly secured to one of the shafts engage(s) guide means which prevent the shafts rotating during movement of the lid between the open and covering positions. When the lid reaches the covering position, engagement between the follower member or members and the guide means ceases so that the shafts rotate and the lid is displaced from the covering position to the sealing position by the relative eccentricity of the rollers and bearings. A cam surface is provided for guiding at least one follower member during return displacement of the lid between the sealing position and the covering position. Two embodiments of the invention, applied to top and bottom closures, are described.
REFERENCES:
patent: 3235103 (1966-02-01), Loveless
patent: 3311255 (1967-03-01), Loveless
patent: 3386206 (1968-06-01), Loveless
patent: 3417881 (1968-12-01), Loveless
patent: 3417896 (1968-12-01), Loveless
patent: 4256701 (1981-03-01), Johansson
Hall George T.
Odenberg Investments Limited
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