Abstract: A ditch blade assembly includes a frame coupling opposing blades oriented in a V-shape. The blades are configured to scrape the ground or surface matter to distribute that matter into a singular channel and/or smooth the surface of the ground. A roller is included to compact the loose dirt exiting the gap between the blades. One or more weights are included to increase the down pressure on the blades. The blade angle may be adjusted with both a manual and hydraulic operating assembly.

Abstract: An improved safety lock allowing for locking of a chain on a grab hook. The safety lock includes a spring-lock that substantially closes the throat of a grab hook. The spring-lock has a recess that is in axial alignment with a clevis portion of the hook, with a clevis pin retaining them. The spring-lock also includes laterally flared sides to permit quick release by thumb-pressure and rotation by one-quarter turn to open the throat. In one embodiment, the clevis pin has an L-bend and is used to substantially close the throat of the grab hook. The spring hook has flared edges and is placed at the back side of the hook to allow for thumb-pressure to rotate the spring-lock, and the attached clevis pin, one-quarter to open the throat of the hook. A coil spring may be attached between the cotter pin used to restrain the clevis pin and the spring-lock. The safety lock can be used with existing hooks.

Abstract: A flat hook is provided with a retractable, spring loaded lock-pin that is used to retain the hook on a rail, pole, etc., extending through the throat of the hook. The lock-pin is either biased in a retaining position or a retracted position. A mechanism is provided to positively lock the lock-pin in the retaining position if desired.

Abstract: A hook is provided with a retractable, spring loaded lock-pin that is used to retain chain link, cable, etc., placed in the throat of the hook. The lock-pin is either biased in a retaining position or a retracted position. A mechanism is provided to positively lock the lock-pin in the retaining position if desired.