One-way conduit closure

A one-way closure for discharge conduits operative for preventing the escape of gases, comprising, in combination, a mounting element connected to the discharge conduit interiorly thereof and subdividing the same into an upper and a lower compartment;

• an elongated connecting conduit sealingly connected to the mounting element and having an upper end portion communicating with the upper compartment, a lower end portion communicating with the lower compartment, and an internal surface bounding a liquid-flow path between the upper and lower compartments;
• a sealing ring arranged exteriorly of and above the lower end portion of the elongated connecting conduit;
• a cover having an upper side with a rim and two mounting portions;
• means mounting the cover for swinging movement about a generally horizontal first axis between a generally horizontal closed position in which the rim of the cover seal tightly engages the sealing ring and a downwardly swung open position, said mounting means including a mounting shaft defining said first axis of the cover;
• adjusting means mounting the cover at the end thereof nearest said generally horizontal first axis for limited vertical displacement of said end and relative to said generally horizontal first axis, said adjusting means including a mounting opening generally oval in shape provided on each mounting portion of the cover and operative for receiving the mounting shaft;
• and biasing means operative for normally moving the cover to said closed position, including a counterweight and a lever structure mounted about a generally horizontal second axis, the counterweight being supported by the lever structure and said cover being mounted on said lever structure for limited movement relative thereto about said first axis within the limits permitted by said adjusting means, said counterweight causing the cover to move to said closed position so that said rim of the cover seal-tightly engages the sealing ring.

A one-way closure for discharge conduits operative for preventing the escape of gases comprising, in combination, a mounting element connected to the discharge conduit interiorly thereof and subdividing the same into an upper and a lower compartment;

• an elongated connecting conduit sealingly connected to the mounting element and having an upper end portion communicating with the upper compartment, a lower end portion communicating with the lower compartment, and an internal surface bounding a liquid-flow path between the upper and lower compartments;
• a sealing ring arranged exteriorly of and above the lower end portion of the elongated connecting conduit;
• a cover having an upper side with a rim;
• means mounting the cover for swinging movement about a generally horizontal first axis between a generally horizontal closed position in which the rim of the cover seal-tightly engages the sealing ring and a downwardly swung open position;
• adjusting means mounting the cover at the end thereof nearest said generally horizontal first axis for limited vertical displacement of said end relative to said generally horizontal first axis;
• and biasing means operative for normally moving the cover to said closed position, and including two counterweights and a lever structure comprising two levers, mounted for pivotal movement about a generally horizontal second axis, each lever being swingable about said generally horizontal second axis and supporting to one side a respective counterweight, and each lever being coupled at the other side to a portion of the cover midway between ends of the cover for limited tilting movement relative to the lever structure about said first axis within the limits permited by said adjusting means, so that when said counterweights urge said cover to said closed position the two levers can permit the two counterweights to assume different elevations and thereby increase the freedom with which the cover can tilt to find a position in which the entirety of said rim seal-tightly engages the sealing ring.

A one-way closure for discharge conduits operative for preventing the escape of gases comprising, in combination, a mounting element connected to the discharge conduit interiorly thereof and subdividing the same into an upper and a lower compartment;

• an elongated connecting conduit sealingly connected to the mounting element and having an upper end portion communicating with the upper compartment, a lower end portion communicating with the lower compartment, and an internal surface bounding a liquid-flow path between the upper and lower compartments;
• a sealing ring arranged exteriorly of and above the lower end portion of the elongated connecting conduit;
• a cover having an upper side with a rim;
• means mounting the cover for swinging movement about a generally horizontal first axis between a generally horizontal closed position in which the rim of the cover seal-tightly engages the sealing ring and a downwardly swung open position, said mounting means including a mounting shaft defining said first axis;
• adjusting means mounting the cover at the end thereof nearest said generally horizontal first axis for limited vertical displacement of said end relative to said generally horizontal first axis and including means for changing the vertical height of said generally horizontal first axis, said changing means comprising a holding structure including two holding members each having a holding opening receiving a respective end portion of the mounting shaft, the bottom part of each holding member below the holding opening thereof including a threaded vertically extending bore opening into the respective holding opening, each holding bore accommodating a threaded height-adjusting screw which extends upwardly into the respective holding opening and engages the mounting shaft;
• and biasing means operative for normally moving the cover to said closed position, including a counterweight and a lever structure mounted for pivotal movement about a generally horizontal second axis, the counterweight being supported by the lever structure and said cover being mounted on said lever structure for limited tilting movement relative thereto about said first axis within the limits permitted by said adjusting means, said counterweight causing the cover to move to said closed position so that said rim of the cover seal-tightly engages the sealing ring.

A one-way closure for discharge conduits operative for preventing the escape of gases comprising, in combination, a mounting element connected to the discharge conduit interiorly thereof and subdividing the same into an upper and a lower compartment;

• an elongated connecting conduit sealingly connected to the mounting element and having an upper end portion communicating with the upper compartment, a lower end portion communicating with the lower compartment, and an internal surface bounding a liquid-flow path between the upper and lower compartments;
• a sealing ring arranged exteriorly of and above the lower end portion of the elongated connecting conduit;
• a cover having an upper side with a rim and two spaced ends;
• means mounting the cover for swinging movement about a generally horizontal first axis between a generally horizontal closed position in which the rim of the cover seal-tightly engages the sealing ring and a downwardly swung open position, said mounting means including a mounting shaft defining said first axis;
• and means for normally swinging said cover into said closed position and including a counterweight with a lever, said cover being coupled midway between the end thereof with said lever of said counterweight for limited tilting movement relative thereto and said counterweight being also mounted on said mounting shaft for swinging movement also about said generally horizontal first axis, so that when said counterweight swings about said first axis it swings said cover about the same first axis with the limited tilting movement of said cover and thereby said rim of said cover seal-tightly engages said sealing ring.