Aerpat A.g.

Avdel Limited

Avdel Systems Limited

Donald S Savage

Ronald L Clarke

Keith Denham

Raymond D Lacey

John A Shortland

Fastener installation apparatus, for installing fasteners such as blind rivets of the type which includes a washer-like member (13) which is free to fall away from the installed fastener, is provided with temporary retaining means for temporarily retaining the washer-like member on the installation apparatus after installation of the fastener. The temporary retaining means comprises a pair of gripping faces (42, 42) which project forwardly from the reaction faces (25, 25) of a pair of members (40 or 48) which are part of the nosepiece of the apparatus. The gripping faces (42, 42) close together automatically to grip the washer-like member as the installation apparatus installs a fastener, and draw apart again to release the washer-like member as the installation apparatus returns to be ready to receive a further fastener for installation.

Fastener installation apparatus

A blind riveting tool has a front abutment provided by a pair of jaws which are spring-urged into their closed position and move to their open position by a generally pivoting movement of each jaws. The jaws are opened by means of a ball which is in contact with the outside of the rearward end of each jaw, the balls being encircled by a rotatable ring having cam faces in contact with the balls. When the ring is rotated, the cam faces force the balls inwards to press the rearward ends of the jaws together, thereby to make each jaw pivot and open the front end of the jaws.

Jaw assembly for blind riveting

An anvil for a blind riveting tool comprises an annular disc 23 of resilient nylon-6 material received in a counterbore in the front of a rigid backing or mount 25. When the tool is used to place a blind rivet, the nylon disc contacts the rivet shell head to support it against the pull of the mandrel. The disc is flexible enough to conform to the shape of the rivet head, thus maximizing the contact area and minimizing the contact thrust, and is soft enough not to damage or mark the rivet head surface, which may, for example, be painted.

Anvil for riveting tool

A collector for the broken-off stems of blind rivets consists of a cylindrical container (20) secured to the rear of the riveting gun head (11). A cylindrical cover (22) closely surrounds the container end and is rotatable around it to a limited extent. The container (20) has an aperture (21), and the cover (22) has a corresponding aperture (23), the cover being biassed by a spring (24) to keep the apertures non-aligned. The cover (22) is rotated by means of a grip (38, 39) to bring the two apertures (21, 23) into alignment to discharge stems from the collector, the aperture (21) being closed automatically by the spring (24) on release of the cover. The container and cover may be of transparent material.

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St. Albans, United Kingdom

Donald S Savage