Electromagnetically operated driving tool with air damper

Details Electromagnetically operated driving tool with air damper Electromagnetically operated driving tool with air damper

1985-10-03

1986-09-16

Bell, Paul A.

Elongated-member-driving apparatus

With means to move or guide member into driving position

Including supply magazine for constantly urged members

173121, 173139, 227130, 227134, B25C 100, B25C 502, B25C 506, B25C 515

Patent

active

046117423

ABSTRACT:
In an electromagnetically operated driving tool, in which a cup-shaped plunger carrying a driver blade is axially slidable in a solenoid, an air damper, combined with a check valve, is provided to damp the plunger during its backward movement to an inoperative position. A hollow cylinder positioned in the plunger is vented through an opening in a housing of the tool and has an interior which is closed at its end with a liftable valve flap. A throttle gap is formed between the plunger and the cylinder, which is adjustable by a piston movable in the cylinder which is made of elastic plastics and is elastically expandable to vary the throttle gap.

REFERENCES:
patent: 1853695 (1932-04-01), Mortimer
patent: 3345546 (1967-10-01), Beltramo
patent: 3434026 (1969-03-01), Doyle
patent: 4183453 (1980-01-01), Barrett et al.
patent: 4230249 (1980-10-01), Nasiatka et al.
patent: 4290489 (1981-09-01), Leavell
patent: 4441644 (1984-04-01), Farian
patent: 4515303 (1985-05-01), Schadlich et al.

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