Patent ID: 7140320

Claim:
A device for holding a boat speedometer log transmitter in a boat hull, the device comprising: a) a sleeve body fixed in a perforation in the boat hull, said sleeve body having a longitudinal center opening for removably inserting and retaining the log transmitter in a watertight manner; b) a head part coupled in a watertight manner to an upper end of said sleeve body, said head part having a center opening with substantially a same shape and cross-sectional size as said longitudinal center opening and said head part having a recess arranged coaxially with said center opening, wherein said center opening is coupled to said longitudinal center opening in a watertight manner for jointly receiving the log transmitter in a watertight manner; said head part comprising: i) a sliding ring disposed in said recess and axially displaceable against a spring force; ii) a plane ring body disposed below said sliding ring; and iii) a first sealing ring supported on said plane ring body; and c) a blocking slide for blocking and opening said longitudinal center opening and said center opening during removal and insertion of the log transmitter, wherein said blocking slide is transversely movable and guided in a plane defined on a top side by said sliding ring and on a bottom side by said first sealing ring to form a watertight seal in a closed position.