Tools – Wrench – screwdriver – or driver therefor – Responsive to torque on work
Reexamination Certificate
2011-01-11
2011-01-11
Thomas, David B (Department: 3723)
Tools
Wrench, screwdriver, or driver therefor
Responsive to torque on work
C053S317000
Reexamination Certificate
active
07866237
ABSTRACT:
The invention deals with the field of screwing heads for small trigger-type pumps or triggers and namely for applying, on vessels, triggers equipped with a threaded securing ring nut (2). This screwing head (1) is rotated around a vertical axis through a permanent magnet-type clutch and comprises four rollers (5) which tighten the toothed ring nut (2) when screwing it; said rollers (5) are supported by vertical arms (4) whose axes are arranged at 90° one from the other on a circumference with its center on the rotation axis of the screwing head. The vertical arms (4) and the four rollers (5) are simultaneously carried along a radial direction towards said ring nut through an oscillating movement.
REFERENCES:
patent: 2069882 (1937-02-01), Hall
patent: 3848488 (1974-11-01), Weisenburger
patent: 4086747 (1978-05-01), Gorton et al.
patent: 4909105 (1990-03-01), Namiki et al.
patent: 5467527 (1995-11-01), Zanini et al.
patent: 5479762 (1996-01-01), Bliss et al.
patent: 5584161 (1996-12-01), Zanini et al.
patent: 2658587 (1991-08-01), None
patent: WO 2005/007556 (2005-01-01), None
International Search Report; Aug. 11, 2006.
Costigan James V.
Hedman & Costigan ,P.C.
Rejves S.r.l.
Thomas David B
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