Fastening tool for engaging in a channel of a concrete block

A gripping tool, for releasably fastening only within a channel defined in a construction block, comprising in combination:

• an elongate body rod carrying a lifting ring at an upper end and having a body in the lower portion, said body
• having two radially extending fastening fins with an obtuse central angle less than 180 degrees therebetween, said fastening fins each pivotally carrying a pair of similar, vertically spaced fastening arm connector links, and
• supporting at least one fixed fastening arm extending radially outwardly away from and on a line bisecting the central angle between the fastening fins;
• similar movable fastening arms carried by each pair of fastening arm connector links, each said movable fastening arm being pivotally interconnected with the outer end portion of the movable fastening arm connector links so that each pair of connector links are parallel, each said movable fastening arm having
• an outer body having an upper edge and a resilient, friction element at least on its radially outermost surface, and
• a stop bracket extending radially outwardly from the upper edge of the outer body to provide support on and prevent passage through a block channel;
• release mechanism including a release collar slidably carried on the body rod between the lower portion and the lifting ring, said release collar having radially extending fastening ears arranged in the same angular relationship as the fastening fins carried by the body rod, each said fastening ear pivotally carrying a release connector link extending into pivotal interconnection with the medial portion of the adjacent upper fastening arm connector link;
• and
• a compression spring carried on the body rod between the release collar and the lifting ring to bias the release collar downwardly away from the lifting ring when the release collar is in a position above which the fastening arm connector links extend perpendicularly to the body rod, but allow the release collar to move upwardly against the spring bias when the tool is supported by the release collar, by reason of the weight of the structure supported by the body rod.

A gripping tool for releasably fastening within a channel defined in a construction block, having planar parallel top and bottom surfaces comprising in combination,

• an elongate body rod carrying
• a lifting ring at an upper end,
• two radially extending fastening fins in the lower portion, said fastening fins having an obtuse central angle less than 180 degrees therebetween and each fastening fin pivotally carrying a pair of similar, vertically spaced fastening arm connector links, and
• at least one fixed fastening arm extending radially outward away from and on a line bisecting the central angle between the fastening fins;
• similar movable fastening arms carried by each pair of fastening arm connector links, each said movable fastening arm being pivotally interconnected with the outer end portions of the movable fastening arm connector links so that each pair of connector links are parallel, each said movable fastening arm having an outer body with an upper edge and outer surface, with a resilient frictional element on the outer surface, and a stop bracket extending radially outwardly from the upper edge to provide support on and prevent passage through a block channel;
• and
• release mechanism including a release collar slidably carried on the body rod between the lower portion and the lifting ring, said release collar having radially extending fastening ears arrayed in the same angular relationship as the fastening fins of the body rod, each said fastening ear pivotally carrying at least one release connector link extending into pivotal interconnection with the upper portion of the adjacent fastening arm;
• and
• a compression spring carried on the body rod between the release collar and the lifting ring to bias the release collar downwardly away from the lifting ring when the release collar is in a position above which the fastening arm connector links extend perpendicularly to the body rod, but allow the release collar to move upwardly against the spring bias when that tool is supported by the release collar, by reason of the weight of the structure supported by the body rod.