Elongated-member-driving apparatus – With interlock means
Patent
1986-07-23
1989-05-16
Bell, Paul A.
Elongated-member-driving apparatus
With interlock means
227 10, B25C 114
Patent
active
048302520
ABSTRACT:
The invention concerns improvements in a hammer-activated, powder-actuated drive tool comprising an elongated tubular housing, a tubular piston guide telescopically received extending from the front end of the housing, a piston telescopically movable within the piston guide, a chamber secured to the rear end of the piston guide for mounting a power load therein, and an activating assembly mounted on the tubular housing rearwardly of the chamber and comprising an elongate member slidably mounted relative to the housing and having a rear end extending outwardly of the housing at the rear end thereof and a forward end extending within the housing for contact with a power load mounted within the chamber. One improvement comprises providing the tubular housing with an internal bushing for slidably mounting the elongate activating member formed as a one-piece integrally molded member which experiences substantially no mechanical loading due to the activation of the power load. A further improvement comprises the provision of a retaining member for retaining a power load within the chamber without regard for the orientation of the tool, when the piston guide is in a retracted position. Yet a further improvement comprises a combined piston guide frictional engagement and retaining and piston resetting means mounted to the tubular housing for frictional engagement and retaining engagement with the piston guide and for engagement with the piston for effecting resetting motion thereof relative to the piston guide.
REFERENCES:
patent: 3497125 (1970-02-01), O'Brien
patent: 3688964 (1972-09-01), De Caro
patent: 4025029 (1977-05-01), Kotas et al.
patent: 4252259 (1981-02-01), Brosius
patent: 4492329 (1985-01-01), Benson et al.
patent: 4493376 (1985-01-01), Kopf
patent: 4789087 (1980-02-01), Combette et al.
Gottlieb Alfred
Wirtes Joseph B.
Bell Paul A.
Continental/Midland, Inc.
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