Patent ID: 8117716
Filing Date: 2012-02-21
Classification: E05F,E05Y,F16F,Y10T

Abstract:
1. A door check apparatus comprising: a pump having first and second chambers separated by a movable wall that is connectable to a door so as to move as the door moves, the pump having a first conduit extending from a first liquid discharge port of the first chamber to the second chamber and a second conduit extending from a first liquid discharge port of the second chamber to the first chamber for discharging liquid from the first chamber or second chamber according to a direction of rotation of the door; a first one-way valve having: a valve element provided in the first conduit; a hole portion provided in the first conduit on the upstream side of the valve element and configured to be brought into a closed state by being closed by the valve element; and urging means that urges the valve element in the direction to close the hole portion, in which the urging means is provided on one of the first conduit side and the valve element side, a surface which intersects the direction of movement of the valve element and generates a component force in the direction to close the hole portion in the valve element when an urging force of the urging means is applied thereon is formed on the other one of the first conduit side and the valve element side, the surface is formed so as to generate a larger component force in the direction to close the hole portion as the valve element approaches the hole portion, the urging means constantly presses the surface from the direction intersecting the direction of movement of the valve element to constantly apply the urging force on the valve element in the direction to close the hole portion, and the flow of the liquid from the interior of the first chamber of the pump through the first liquid discharge port of the first chamber to the interior of the first conduit is allowed and the flow of the liquid in the opposite direction is prevented; and a second one-way valve having: a valve element provided in the second conduit, a hole portion provided in the second conduit on the upstream side of the valve element and configured to be brought into a closed state by being closed by the valve element, and an urging means that urges the valve element in the direction to close the hole portion, in which the urging means is provided on one of the second conduit side and the valve element side, a surface which intersects the direction of movement of the valve element and generates a component force in the direction to close the hole portion in the valve element when an urging force of the urging means is applied thereon is formed on the other one of the second conduit side and the valve element side, the surface is formed so as to generate a larger component force in the direction to close the hole portion as the valve element approaches the hole portion, the urging means constantly presses the surface from the direction intersecting the direction of movement of the valve element to constantly apply the urging force on the valve element in the direction to close the hole portion, and the flow of the liquid from the interior of the second chamber of the pump through the first liquid discharge port of the second chamber to the interior of the second conduit is allowed and the flow of the liquid in the opposite direction is prevented.