Boat seat mounting unit

A unit for mounting a seat on a boat thwart or the like, said unit comprising a base adapted to rest on the thwart and to have said seat secured thereto, means carried by the base for clamping it on the thwart, said clamping means comprising a pair of arms extending outwardly from opposite sides of the base, a clamping shoe at the outer end of each arm, said shoes being engageable with opposite sides of the thwart for clamping the base thereto, rough adjustment means for quickly adjusting the shoes to space them apart a distance somewhat greater than the width of the thwart for application of the unit to the thwart, fine adjustment means for precisely adjusting the shoes to draw them into clamping engagement with opposite sides of the thwart, said arms being journalled in said base for conjoint rotation about their axes from an unfolded clamping position in which the shoes are engageable with the thwart to a folded portable position, and means for locking the arms in said unfolded position comprising a locking lever mounted on said base for moving between a locking position in which the arms are locked in said unfolded position and a release position in which said arms are rotatable out of said unfolded position, said locking lever being generally U-shaped and having two parallel legs for receiving an arm therebetween when said lever is in its locking position, said legs being spaced apart a distance slightly greater than the width of the arm whereby when the arm is received between said legs the arms are locked in a desired position.

A unit for mounting a seat on a boat thwart or the like, said unit comprising a base adapted to rest on the thwart and to have said seat secured thereto, means carried by the base for clamping it on the thwart, said clamping means comprising a pair of arms extending outwardly from opposite sides of the base, a clamping shoe at the outer end of each arm, said shoes being engageable with opposite sides of the thwart for clamping the base thereto, rough adjustment means for quickly adjusting the shoes to space them apart a distance somewhat greater than the width of the thwart for application of the unit to the thwart, fine adjustment means for precisely adjusting the shoes to draw them into clamping engagement with opposite sides of the thwart, each of said arms having an outer end portion extending generally perpendicularly from the inner portion of the arm, an elongate shoe mounted on the outer end portion of each respective arm for rotation about an axis generally parallel to the inner portion of the arm, and detent means for releasably holding at least one of said shoes in a first position in which the shoe is generally parallel to the outer end portion of the respective arm and in a second clamping position in which the shoe is generally perpendicular to the outer end portion of the arm, said detent means comprising a spring for biasing said one shoe against the respective arm and a series of stops on the shoe engageable with the arm for releasably holding the shoe in said first and second positions.

A unit for mounting a seat on a boat thwart or the like, said unit comprising a base adapted to rest on the thwart and to have said seat secured thereto, means carried by the base for clamping it on the thwart, said clamping means comprising a pair of arms extending outwardly from opposite sides of the base, a clamping shoe at the outer end of each arm, said shoes being engageable with opposite sides of the thwart for clamping the base thereto, guide means on the base for guiding the arms for axial adjustment of the arms to space the shoes apart a distance somewhat greater than the width of the thwart for application of the unit to the thwart, means for securing the arms in adjusted position in the guide means, and fine adjustment means for precisely adjusting the shoes to draw them into clamping engagement with opposite sides of the thwart, said arms being readily movable between an unfolded clamping position in which the shoes are engageable with the thwart and a folded portable position, the arms being in the guide means when in said folded and unfolded positions, said base comprising a mounting plate for having said seat secured thereto, and said guide means being mounted on the underside of the plate and defining a guideway immediately adjacent the plate, said arms being axially adjustable in the guideway for adjusting the spacing between said shoes, said guide means not extending substantially outwardly beyond the sides of the plate thereby to enable said shoes to be spaced relatively close together for application of the unit to relatively narrow thwarts, said mounting plate having leg means thereon engageable with the top of a thwart for supporting the plate and said guide means above the thwart.