Patent Number: 6,168,345

Title: Couplers

Abstract: A right-angle scaffold coupler comprises two jaw assemblies (10A, 10B) each with jaws formed by a closure-plate (12) hinged to a common chassis (11), and having a hand lever (14) hinged (at 21) to the plate (12) with a spirally-coiled spring (25 FIG. 4) as hinge-pin within interleaved finger-lugs (26, 27). A hook-member (15) hinged to the lever (14) engages a lip (19) of the chassis (11) so that depression of the lever (14) pulls the plate (12) towards the chassis (11) in closing the jaws onto a scaffolding tube (13) and clamping to it by over-center action. The spring (25) coils up more tightly during the over-center action allowing resilient displacement between the lugs (26, 27) of hinge (21) to accommodate variations in tube circumference. The jaw surface (17) of the chassis (11) subtends more than 180 degrees to snap fit with the tube (13).

Inventors: Legge; Philip (Henley-on-Thames, Oxon RG9 6JN, GB)

Assignee:

International Classification: E04G 7/00 (20060101); E04G 7/14 (20060101); F16C 11/02 (20060101); F16C 11/00 (20060101); E04G 007/06 ()

Expiration Date: 01/02/2018