Abstract: A fall rescue apparatus (10) for mounting on the roof of a building includes a spike (28) mounted to an extendable support arm (27) and shaped to penetrate the roof in response to the pull of a tether (35) connected to a falling worker. An elbow linkage (39) unfolds as the spike is extended into the roof for guiding and supporting the spike against the roof.

Abstract: Stackable supports for supporting upright fence posts are arranged in overlying relationship, forming an “X” shape with sockets (30) extending from the support blocks (22) up through openings (44) of the cross blocks that receive the end portions of the fence posts (15), with lock pins (50) that extend through the aligned openings of the sockets and the fence posts.

Abstract: A fall rescue apparatus (10) for mounting on the roof of a building includes a spike (28) mounted to an extendable support arm (27) and shaped to penetrate the roof in response to the pull of a tether (35) connected to a falling worker. An elbow linkage (39) unfolds as the spike is extended into the roof for guiding and supporting the spike against the roof.

Abstract: A ball clamp 30 has a semi-spherical surface that is urged by coil compression spring 34 into engagement with the spherical surface of a hitch ball. An L-shaped flange 73 on the rear of the ball clamp guides the groove 75 along the length of the sloped guide tongue 69 of the ball clamp support 65, assuring that the ball clamp 30 is properly supported and accurately positioned during its movements toward and away from the ball hitch 12.

Abstract: A ball clamp 30 has a semi-spherical surface that is urged by coil compression spring 34 into engagement with the spherical surface of a hitch ball. An L-shaped flange 73 on the rear of the ball clamp guides the groove 75 along the length of the sloped guide tongue 69 of the ball clamp support 65, assuring that the ball clamp 30 is properly supported and accurately positioned during its movements toward and away from the ball hitch 12. The ball socket housing 22 includes a recess 137 on its top surface and the locking lever 136 pivots into said recess upon contact by an approaching obstacle for avoiding destructive contact with the obstacle. The latch lever 136 has an intermediate portion 135 connected to the clamp pin 132, a fulcrum 140 at one end and a lifting end 146, and a latch catch surrounding said clamp pin for engaging the fulcrum end to hold the latch lever upright.

Abstract: A pair of bunk board guide-on post assemblies 30, 31 are mounted on opposite sides of the frame 20 of a boat trailer 4 just at the aft ends of the bunk boards 25, 26 of the trailer. The guide-on post assemblies each include a rectilinear upwardly extending support bar 38 that defines a longitudinal slot 50, and a buoyant guide-on post 44 is telescopically mounted downwardly about the support bar 38 and defines a laterally extending connector opening 52 that registers with the longitudinal slot. A connector pin 54 extends through the laterally extending connector opening of the guide-on post and through the longitudinal slot of the upwardly extending support bar so that the buoyancy of the guide-on posts telescopes upwardly in response to partial immersion of the bunk boards of the boat trailer, providing a visual indication of the location of the submerged ends of the bunk boards.

Abstract: A ball latch 46 is reciprocally mounted in a latch slot 44 and is biased downwardly by coil compression spring 68 until the semi-spherical recess at its lower end becomes coextensive with the spherical surface of the ball socket 36. When the trailer hitch 16 is placed on the hitch ball 26, the force applied by the hitch ball against the ball latch 46 moves the ball latch upwardly against the bias of its spring 68 to make room for the hitch ball to enter the ball socket 36. Once the hitch ball is fully inserted in the ball socket 36, the spring 68 pushes the ball latch 46 back to its locked position about the hitch ball.

Abstract: A ball latch 46 is reciprocally mounted in a latch slot 44 and is biased downwardly by coil compression spring 68 until the semi-spherical recess at its lower end becomes coextensive with the spherical surface of the ball socket 36. When the trailer hitch 16 is placed on the hitch ball 26, the force applied by the hitch ball against the ball latch 46 moves the ball latch upwardly against the bias of its spring 68 to make room for the hitch ball to enter the ball socket 36. Once the hitch ball is fully inserted in the ball socket 36, the spring 68 pushes the ball latch 46 back to its locked position about the hitch ball.

Abstract: A pair of bunk board guide-on post assemblies 30, 31 are mounted on opposite sides of the frame 20 of a boat trailer 4 just at the aft ends of the bunk boards 25, 26 of the trailer. The guide-on post assemblies each include a rectilinear upwardly extending support bar 38 that defines a longitudinal slot 50, and a buoyant guide-on post 44 is telescopically mounted downwardly about the support bar 38 and defines a laterally extending connector opening 52 that registers with the longitudinal slot. A connector pin 54 extends through the laterally extending connector opening of the guide-on post and through the longitudinal slot of the upwardly extending support bar so that the buoyancy of the guide-on posts telescopes upwardly in response to partial immersion of the bunk boards of the boat trailer, providing a visual indication of the location of the submerged ends of the bunk boards.

Abstract: A wheel spindle assembly including a spindle for mounting a wheel, the spindle including a proximal end and a distal end, the proximal end including a perpendicular end surface and a locator protrusion extending outwardly from the end surface. A spindle mounting plate supports the spindle and includes front and back surfaces and a centrally positioned locator opening. The locator opening is sized and shaped to receive the locator protrusion such that engagement of the locator protrusion within the locator opening and abutment of the front surface of the spindle mounting plate with the end surface of the proximal end of the spindle positions the spindle relative to the spindle mounting plate with the spindle extending perpendicularly from the front surface of the spindle mounting plate.

Abstract: A pivotal spare tire carrier (40) is mounted to a side frame segment (21) of a boat trailer (10). The proximal end of the support arm (50) is pivotally attached to the trailer frame on the outside surface thereof and tilts the tire from between mount and dismount positions outside the trailer frame and a travel position inside the trailer frame. When the tire is located in its travel position it is tilted approximately parallel to the facing surface of the hull of the boat.

Abstract: The boat trailer includes segmented bunk board covers, with the segments being of different lengths so that they can be combined to cover different lengths of bunk boards. The bearing surfaces of the bunk board covers include a series of oppositely sloped lifting edges that tend to lift the facing surface of the boat hull so that when the boat is tilted on the trailer, the lowermost surface of the boat hull tends to apply more weight to one of the bunk boards, so that the lower surface tends to be lifted by its bunk board.

Abstract: An axle assembly includes a spindle (12) that extends through a mounting collar (28) into the open end of the axle. A cam key (70) moves through a key hole (22) in the axle and registers with the cam slot (54) of the spindle. The cam surface (76) of the cam key (70) is reversible with the cam surface (76) engaging either the bearing surface (58) or the bearing surface (60) of the spindle, to urge the spindle into or out of the axle.

Abstract: The trailer hitch (10) includes a guide bar (25) threaded about the stem (20) of the hitch ball (18). An alignment plate (45) that is rigidly mounted to the lower wall of the trailer tongue (34) has converging guide surfaces (50 and 51) that receive the guide bar (25), causing the guide bar and the crotch of the converging surfaces to become aligned as the guide bar engages the alignment plate. This aligns the ball receiving socket (42) of the coupler (40) with the hitch ball (18).

Abstract: The disc brake caliper (26) has a stainless steel drive element (62) that faces the brake fluid and an aluminum contact element (64) received in the drive element, protruding therefrom so as to engage and move the brake pad (38) into frictional engagement with the vented rotor (40).