Elongated-member-driving apparatus – Explosive-type driving means – With plunger
Patent
1990-07-26
1991-10-15
Phan, Hien H.
Elongated-member-driving apparatus
Explosive-type driving means
With plunger
173139, B25C 104
Patent
active
050567012
ABSTRACT:
An explosive powder charge operated fastening element setting tool includes an interceptor (14) for intercepting or cushioning a driving piston (8) in the event excess energy is supplied to the piston in driving a fastening element into a receiving material. The driving piston (8) has a shoulder (12a) displaceable when excess energy is present into the axially extending region of a deformable stopper (27) in contact with a bolt guide (4). If the interceptor (14) for the driving piston (8) does not afford an adequate braking, the shoulder (12a) runs up against the stopper (27) and the stopper is deformed and tightly clamps or jams the driving piston (8) so that it can not be freely displaced. When such jamming action takes place, the tool operator is signaled that a buffer (23) between the interceptor and the bolt guide and possibly the stopper (27) need to be replaced.
REFERENCES:
patent: 3212535 (1965-10-01), Broske
patent: 4222462 (1980-09-01), Ottestad
patent: 4492329 (1985-01-01), Benson et al.
patent: 4609135 (1986-09-01), Elliesen
patent: 4824003 (1989-04-01), Almeras et al.
Hilti Aktiengesellschaft
Phan Hien H.
Woods Raymond D.
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