Tiltable swivel seat

A seat unit comprising:

• a fixed support having a top wall,
• a seat,
• a mount assembly connected to the seat for mounting the seat on the support, means pivotally connecting the mount assembly to the support allowing the mount assembly and seat to rotate about an upright axis,
• first lock means mounted on the support and engageable with the mount assembly to hold the mount assembly and seat in a fixed position, said first lock means being mounted on the top wall and releasable from the mount assembly thereby allowing rotation of the mount assembly and seat,
• said mount assembly including a base member and rail means secured to the seat, said base member being located over and engageable with the top wall, said means pivotally connecting the mount assembly to the support comprising an upright pivot pin connecting the top wall and the base member, means pivotally connecting the rail means to the base member for movement about a transverse horizontal axis, second lock means mounted on the base member for releasably holding the rail means in a selected angular position, said second lock means including a control rod rotatably mounted on the base member, arm means fixed to the control rod, and biasing means connected to the arm means for biasing the arm means to a locking position, said control rod being movable to release the arm means thereby allowing the rail means to pivot about said transverse horizontal axis,
• said rail means including a pair of rail assemblies secured to the seat allowing longitudinal fore and aft movement of the seat, each rail assembly having a movable carriage for adjusting the fore and aft position of the seat, and third lock means being operable to hold the carriages in a selected position.

A mount assembly for mounting a seat on a support comprising:

• a base member adapted to be pivotally connected to the support for movement about an upright axis,
• first lock means for holding the base member in a selected position,
• rail means adapted to be secured to the seat,
• means pivotally connecting the rail means to the base member for movement about a transverse horizontal axis, a transverse plate secured to the end of the rail means remote from the means pivotally mounting the rail means to the base member, said plate having a pair of longitudinal slots,
• second lock means mounted on the base member for releasably holding the rail means in a selected angular position, said second locking means including a pair of arms, one arm of said pair projected through a slot, each arm having a plurality of teeth engageable with the plate to fix the angular position of the rail means, means to bias the arms into engagement with the plate, means connected to the arms operable to move the arms out of engagement with the plate,
• said rail means including movable means adapted to be secured to the seat allowing longitudinal fore and aft movement of the seat, and
• third lock means for holding the movable means in a selected position.

A mount assembly and a fixed support having a top wall for supporting a seat comprising:

• means for connecting the seat to the mount assembly, means for pivotally connecting the mount assembly to the top wall of the support allowing the mount assembly and seat connected thereto to rotate about a generally upright axis, first lock means mountable on the top wall of the support and engageable with the mount assembly to hold the mount assembly and seat in a fixed position, said first lock means being releasable from the mount assembly thereby allowing rotation of the mount assembly and seat about said generally upright axis, said mount assembly including a base member and rail means adapted to be secured to the seat, said means for pivotally connecting the mount assembly to the support comprising an upright pivot pin connecting the top wall and the base member, means pivotally connecting the rail means to the base member for movement about a generally transverse horizontal axis, second lock means mounted on the base member for releasably holding the rail means in a selected angular position, said second lock means including a control rod rotatably mounted on the base member, arm means fixed to the control rod, and biasing means connected to the arm means for biasing the arm means to a locking position, said control rod being movable to release the arm means thereby allowing the rail means to pivot about said transverse horizontal axis, said rail means including a pair of rail assemblies adapted to be secured to the seat allowing longitudinal fore and aft movement of the seat, each rail assembly having a movable carriage for adjusting the fore and aft position of the seat, and third lock means being operable to hold the carriages in a selected position.