Breakstem fastener installation tool

Details Breakstem fastener installation tool Breakstem fastener installation tool

1986-05-05

1987-11-10

Schmidt, Frederick R.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

2924353, B21J 1520

Patent

active

047048883

ABSTRACT:
A breakstem rivet installation tool includes an airflow ejector for ejecting broken-off stems through a rear pipe (23) mounted on the tool housing (11). The ejector is provided by the annular gap (28) between the front-end of the rear pipe (23) and the rear-end part (26) of an extension pipe (25) mounted on the reciprocable stem-pulling draw rod (13). In order to adjust the rate of air-flow through the ejector, the rear pipe (23) is axially adjustable to vary the size of the annular gap (28). To this end, the pipe (23) is screw-threaded into the housing, and its position can be locked by a lock nut (62). The range of adjustment of the ejector flow includes complete shutting off the air flow.

REFERENCES:
patent: 3451248 (1967-01-01), Bell
patent: 3523441 (1970-08-01), Bell et al.
patent: 4027520 (1977-06-01), Klein
patent: 4275582 (1981-06-01), Sheffield
patent: 4281531 (1981-08-01), Ehmann et al.
patent: 4454746 (1984-06-01), Schwab
patent: 4515005 (1985-05-01), Klein
patent: 4517820 (1985-05-01), Oefinger et al.

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