Patent ID: 9377043
Filing Date: 2016-06-28
CPC Classification: E04G,F16B,Y10T

Claim Text:
1. A method for temporarily fastening a formwork part to a structural element the method comprising: attaching the formwork part to the structural element using a nail-shaped fastener applied by a setting tool, the fastener including: a shank having a tip formed at a first end and a head formed at second end opposite the first end; and a sleeve-shaped washer coupled to the head of the shank that includes a first washer end facing the tip of the shank, a second washer end opposite the first washer end, a circumferentially inwardly disposed first collar at the first washer end and a circumferentially outwardly disposed second collar at the second washer end, the circumferentially inwardly disposed first collar narrowing radially inwardly, the attaching causing the first collar to be in contact with an underside of the head and the formwork part, the second collar remaining spaced from the formwork part after the attaching; and removing the fastener from the structural element using an extraction tool contacting the second washer end, the first end thereby pulling the head of the fastener to remove the shank from the formwork part.