Wall climbing form hoist

A self-climbing and self-lowering concrete wall form hoist for forming a concrete wall section atop a previously formed wall section, comprising:

• a) a wall mounting releasably secured to a previously formed wall section;
• b) a moveable vertical mast comprised of an engagement surface;
• c) a channel in the wall mounting which guideably receives the moveable mast;
• d) a means for releasably supporting the mast or platform on the wall mounting;
• e) a platform alternatively supported on the mast or on the wall mounting;
• f) upper and lower dog latch assemblies mounted on the platform, each of the dog latch assemblies further comprising;
• g) a dog comprising of an upper end portion including an engagement device and a lower end portion including an engagement device, the dog being pivotable about a central axis to be engaged to the mast with one of the upper and lower end portions between a platform-raising-position when the mast is supported on the wall mounting, and a mast-raising-position when the platform is supported on the wall mounting
• h) the upper and lower dog latch assemblies being further pivotable between a platform-lowering-position when the mast is supported on the wall mounting and a mast-lowering-position when the platform is secured to the wall mounting,
• i) an extensible and retractable linear actuator interconnecting the upper and lower dog latch assemblies for raising the platform relative to the mast when the dog latch assemblies are in the platform-raising-position and for raising the mast relative to the platform when the dog latch assemblies are in the mast-raising-position;
• and,
• j) the extensible and retractable linear actuator further interconnecting the upper and lower dog latch assemblies for lowering the platform relative to the mast when the mast is supported on the mounting assembly and when the dog latch assemblies are in the platform-lowering-position, and for lowering the mast relative to the platform when the platform is supported on the mounting assembly and when the dog latch assemblies are in the mast-lowering-position.