A boat lift includes a base frame portion for supporting a boat; an upright frame portion extending substantially upright from the base frame portion, the upright frame portion comprising a swing arm, the swing arm comprising: a shock absorption assembly comprising a resilient shock absorber; an arm body slidably coupled to the shock absorption assembly proximate a first swing arm end of the swing arm; and a swing pivot proximate the first swing arm end; and a dock mounting assembly configured to mount the boat lift frame to a dock, the swing arm pivotably coupled to the dock mounting assembly by the swing pivot.
1 . A boat lift comprising:
a base frame portion for supporting a boat;
an upright frame portion extending substantially upright from the base frame portion, the upright frame portion comprising a swing arm, the swing arm comprising:
a shock absorption assembly comprising a resilient shock absorber;
an arm body slidably coupled to the shock absorption assembly proximate a first swing arm end of the swing arm; and
a swing pivot proximate the first swing arm end; and
a dock mounting assembly configured to mount the boat lift frame to a dock, the swing arm pivotably coupled to the dock mounting assembly by the swing pivot.
2 . The boat lift of claim 1 , wherein:
the shock absorption assembly further comprises a shock housing;
the resilient shock absorber is arranged within the shock housing; and
a first body end of the arm body extends into and slides within a housing interior of the shock housing.
3 . The boat lift of claim 2 , wherein:
the arm body is slidably coupled to the shock housing by a shock fastener;
the arm body defines an elongated fastener slot; and
the shock fastener is configured to slide within the elongated fastener slot.
4 . The boat lift of claim 3 , wherein the resilient shock absorber is a bellows.
5 . The boat lift of claim 3 , wherein:
the swing arm further comprising an end sleeve:
the end sleeve is fixedly coupled to the shock housing at the first swing arm end by the shock fastener; and
the resilient shock absorber and the elongated fastener slot are arranged within the end sleeve.
6 . The boat lift of claim 5 , wherein the swing pivot is mounted to the end sleeve.
7 . The boat lift of claim 1 , wherein:
the swing pivot comprises a pivot bushing and a pivot fastener;
the pivot fastener couples the swing arm to the dock mounting assembly; and
the pivot bushing pivots about the pivot fastener.
8 . The boat lift of claim 7 , wherein:
the dock mounting assembly comprises a positioner plate;
the positioner plate defines a plurality of arm positioner holes;
the pivot fastener engages a corresponding one of the arm positioner holes to couple the swing arm to the dock mounting assembly; and
the pivot fastener is selectively adjustable between the plurality of arm positioner holes to adjust a longitudinal position of the swing arm relative to the positioner plate.
9 . The boat lift of claim 8 , wherein the dock mounting assembly further comprises an upper mounting bracket and a lower mounting bracket for coupling the dock mounting assembly to the dock.
10 . The boat lift of claim 9 , wherein:
the positioner plate further comprises a plurality of bracket positioner holes;
a bracket fastener engages a corresponding one the bracket positioner holes to couple the lower mounting bracket to the positioner plate; and
the bracket fastener is selectively adjustable between the plurality of bracket positioner holes to adjust a longitudinal position of the lower mounting bracket relative to the positioner plate.
11 . The boat lift of claim 10 , wherein:
the dock mounting assembly further comprises a threaded rod defining an upper rod end and a lower rod end opposite the upper rod end;
the threaded rod extends through a lower rod opening formed through the lower mounting bracket;
a threaded nut is mounted on the threaded rod between the lower mounting bracket and the lower rod end;
the threaded nut is configured to be selectively:
tightened towards the upper rod end to bias the lower mounting bracket upward along the threaded rod towards the upper rod end; and
loosened towards the lower rod end to permit the lower mounting bracket to slide downward along the threaded rod towards the lower rod end.
12 . The boat lift of claim 1 , wherein:
the boat lift further comprises a vertical boat guide defining lower section and an adjuster gear mounted to the lower section;
the upright portion defines a guide opening;
the adjuster gear engages the guide opening in a locked position and disengages the guide opening in an unlocked position;
in the locked position, the vertical boat guide is prohibited from rotating relative to the upright portion, and in the unlocked position, the vertical boat guide is permitted to rotate relative to the upright portion.
13 . A boat lift comprising:
a base frame portion for supporting a boat, the base frame portion comprising a boat support member extending laterally between a first lift side of the boat and a second lift side of the boat lift;
an upright frame portion extending substantially upright from the base frame portion, the upright frame portion comprising a swing rail at the first lift side; and
a torsion assembly pivotably coupling the swing rail to the boat support member, the torsion assembly comprising:
a main axle extending laterally through an interior of the boat support member and rotatably relative to the boat support member; and
a torsion tube fixedly coupled to each of the swing rail and the main axle.
14 . The boat lift of claim 13 , wherein:
the boat support member comprises an interior framework formed within the interior thereof;
the interior framework defining a substantially cylindrical channel along a length of the boat support member; and
the main axle is received through the substantially cylindrical channel.
15 . The boat lift of claim 14 , wherein:
the boat support member defines a first member end and a second member end opposite the first member end;
the boat lift further comprises a torsion sleeve comprising a substantially cylindrical sleeve body;
the substantially cylindrical sleeve body extends into the substantially cylindrical channel at the first member end; and
the main axle extends through the substantially cylindrical sleeve body.
16 . The boat lift of claim 15 , wherein:
the torsion tube extends into a hollow interior of the main axle;
the torsion tube defines an inner tube end arranged within the hollow interior of the main axle and an outer tube end arranged external to the hollow interior of the main axle;
a spacer is mounted to the torsion tube at the inner tube end to maintain the torsion tube in coaxial alignment with the main axle.
17 . The boat lift of claim 13 , wherein:
the torsion tube extends into a hollow interior of the main axle;
the torsion tube defines an inner tube end arranged within the hollow interior of the main axle and an outer tube end arranged external to the hollow interior of the main axle; and
the torsion tube is fixed in position relative to the main axle by a lock assembly.
18 . The boat lift of claim 17 , wherein:
the main axle defines a circumferential axle slot;
the lock assembly comprises a tube retainer is mounted within the circumferential axle slot; and
the tube retainer engages the torsion tube to prohibit rotations of the tube retainer relative to the main axle.
19 . The boat lift of claim 18 , wherein:
the lock assembly further comprises an axle clamp and a clamp fastener;
the main axle extends through an axle opening of the axle clamp; and
the clamp fastener is coupled to the axle clamp and biases the tube retainer against the torsion tube.
20 . The boat lift of claim 17 , wherein:
the outer tube end of the torsion tube extends transversely into a rail opening formed proximate a lower rail end the swing rail;
the torsion tube defines a fastener groove formed proximate the outer tube end;
the fastener groove is oriented within an interior of the swing rail; and
a rail fastener engages the fastener groove to couple the torsion tube to the swing rail.
21 . The boat lift of claim 17 , wherein:
the lock assembly is a cuff lock assembly comprising a cuff body and at least one cuff fastener;
the cuff body defines a cuff void defining a cuff axis; and
the at least one cuff fastener extends radially through the cuff body and into the cuff void to engage each of the main axle and the torsion tube.
22 . The boat lift of claim 21 , wherein:
the cuff lock assembly further comprises an inner plate arranged at an inner end of the cuff body and an outer plate arranged at an outer end of the cuff body;
the main axle extends through an inner opening of the inner plate and into the cuff void; and
the torsion tube extends through the inner opening of the inner plate, the cuff void, and an outer opening of the outer plate.
23 . A boat lift comprising:
a base frame portion for supporting a boat, the base frame portion comprising a boat support member extending laterally between a first lift side of the boat and a second lift side of the boat lift, the boat support member defining a longitudinal slot formed in a top wall of the boat support member and extending along a length of the boat support member;
an upright frame portion extending substantially upright from the base frame portion; and
a bunk bracket slidably mounted to the boat support member by a bracket fastener, wherein the bracket fastener engages and slides within the longitudinal slot to reposition the bunk bracket along the length of the boat support member.
24 . The boat lift of claim 23 , wherein:
the boat support member further defines a longitudinal channel extending along a length of the boat support member;
the longitudinal slot allows access to the longitudinal channel; and
a portion of the bracket fastener engages and slides within the longitudinal channel.
25 . The boat lift of claim 24 , wherein:
the bracket fastener is a nut and bolt assembly comprising a bolt and a threaded nut;
the bolt defines a head arranged within the longitudinal channel and a threaded shaft extending from the head and through the longitudinal slot;
the size of the head prohibits the head from passing through the longitudinal slot;
the threaded shaft engages the bunk bracket; and
the nut is tightened onto a distal end of the threaded shaft, opposite the head.
26 . The boat lift of claim 24 , wherein an interior framework formed within an interior of the boat support member defines the longitudinal channel.
27 . The boat lift of claim 23 , wherein:
the bunk bracket comprises a support portion and a bracket portion;
the bracket portion is slidably mounted to the boat support member by the bracket fastener;
the bracket portion is formed at a distal support end of the support portion, distal to the boat support member;
a bunk board is mounted on the bracket portion.