Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Multipart
Patent
1997-09-03
1999-04-20
Saether, Flemming
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Multipart
411437, 411348, 52426, 249 40, F16B 3708, E04G 1106
Patent
active
058951881
ABSTRACT:
A form panel quick fastener including a clamping plate having an elongated channel base fixedly fastened to a form panel at an outer side and a through hole disposed in the middle of the elongated channel base and aligned with a through hole of the form panel and a barrel raised from the elongated channel base at an inner side around the through hole of the clamping plate; a screw rod inserted through the through hole of the clamping plate and the through hole of the form panel and having a spiral groove around the periphery; and a ball thrust bearing sleeved onto the screw rod and forced into engagement with the barrel of the clamping plate to hold down the screw rod, the ball thrust bearing including a hexagonal head having a center through hole which receives the screw rod, a tubular flange perpendicularly raised from the hexagon head at one side around said center through hole of the hexagon head, a plurality of spiral holes spaced around the tubular flange at different elevations, and a plurality of steel balls respectively moved in the spiral holes and forced by an inside wall of the barrel of the clamping plate into engagement with the spiral groove of the screw rod.
REFERENCES:
patent: 2161379 (1939-06-01), Neptune
patent: 2523131 (1950-09-01), Martin
patent: 2583962 (1952-01-01), Neptune
patent: 4737059 (1988-04-01), Batten
patent: 4841796 (1989-06-01), Teramachi
patent: 4864884 (1989-09-01), Klinkenberg
patent: 4908916 (1990-03-01), Berte
patent: 5160180 (1992-11-01), Mlynarczyk
patent: 5332189 (1994-07-01), Tseng
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