Elongated-member-driving apparatus – Explosive-type driving means – With plunger
Patent
1998-06-09
2000-07-25
Smith, Scott A.
Elongated-member-driving apparatus
Explosive-type driving means
With plunger
173211, B25C 114
Patent
active
060927100
ABSTRACT:
The invention relates to an explosive powder charge operated bolt-setting tool having a bolt guide (2) which has a through bore (4) for explosive powder charge actuable driving piston (5), a ball brake being provided for the driving piston (5), which brake is designed as a freewheel for the return of the driving piston (5) and comprises a recess (9), which is open radially towards the driving piston (5) and has two spring-loaded brake balls (12) each of which are accommodated therein, and which bear against the driving piston (5) and which can be moved, with maximum and minimum spring loading, between two axial stops (3, 16) along an oblique surface (15) which widens conically at an acute angle towards the driving piston (5). In this case, there is inserted into the recess (9), adjacent to the outside of each brake ball (12), an insert (14) provided with the oblique surface (15), the inserts (14) being acted upon in the axial direction by a respective spring (8), the springs (8) being supported on the outside by a retaining ring (6).
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Berner GmbH
Christensen Douglas J.
Smith Scott A.
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