Drain board installing device without anchor plate

Details Drain board installing device without anchor plate Drain board installing device without anchor plate

2008-12-15

2009-11-10

Lagman, Frederick L (Department: 3672)

Hydraulic and earth engineering

Drainage or irrigation

Porous waterway, e.g., sand drain, etc.

C405S043000, C405S232000

Reexamination Certificate

active

07614823

ABSTRACT:
A drain board installing device without an anchor plate is disclosed. A drain board temporary clamp device146comprises a protrusion body321provided at the center part of an inner wall of the through hole below the drain casing; a plate shaped arm333provided with a slit to allow the arm to ascend and descend at a predetermined length along a longitudinal direction of the drain casing within the through hole of the drain casing under the guide of the protrusion; and a T shaped rod335fixed to a lower part of the plate shaped arm, wherein, when the plate shaped arm333and the T shaped rod335descend toward the lower end of the drain casing within the maximum range by means of their load, a lower end part333aof the plate shaped arm descends to the part where a lower end part204aof the drain casing is located, and when the plate shaped arm333and the T shaped rod335move toward the upper end of the drain casing within the maximum range by means of their load, a T shaped end part335aof the rod is caught in a slit154formed in the lower end part of the drain casing.

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patent: 2005/0141964 (2005-06-01), Tomlinson
patent: 2008/0080932 (2008-04-01), Morizot et al.

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