A manway open and close assist device that is operably connected to at least one upper hinge attachable to a manway cover and a lower hinge attached to a vessel or tank. The device comprises. A disc-like piston is mounted on a threaded input screw and at least one anti-rotation member to provide linear translation of the piston due to rotation of the input screw. A cylindrical and tubular housing that receives the threaded input screw, the anti-rotation member, and the piston, wherein the housing has a plurality of helical grooves disposed in its inner surface that receive teeth on the outer surface of the piston. The housing may be fixed to the upper hinge member(s) and a rotation of the housing and attached hinge member(s) is effectuated by rotating the input screw and resulting linear movement of the piston to open and close the manway cover.
Manway open and close assist device
2021-03-02
Patent
Elektronische Ressource
Englisch
IPC: | E05F DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION , Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung / B61D Einzelheiten oder Arten des Wagenaufbaus von Eisenbahnfahrzeugen , BODY DETAILS OR KINDS OF RAILWAY VEHICLES / B65D Behältnisse zur Lagerung oder zum Transport von Gegenständen oder Materialien [Container], z.B. Säcke, Beutel, Fässer, Flaschen, Dosen, Kästen, Büchsen, Schachteln, Packkörbe, Tonnen, Gläser, Flüssigkeitsbehälter, Trichtersilos, Transportbehälter , CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS / E02D FOUNDATIONS , Gründungen / F16J Kolben , PISTONS |