Method for the operation of a motor-driven hand-held...

Details Method for the operation of a motor-driven hand-held... Method for the operation of a motor-driven hand-held...

2008-05-16

2011-11-15

Nguyen, Jimmy T (Department: 3725)

Presses

Methods

C100S043000, C072S453160

Reexamination Certificate

active

08056473

ABSTRACT:
A hydraulic pressing unit includes a hydraulic pump, supply and hydraulic chambers, moving and stationary parts, a restoring spring, and a return valve provided within or attached to a housing. The moving part is displaced from a starting position into a pressing position as a result of filling the hydraulic chamber with a hydraulic medium from the supply chamber by using the hydraulic pump. The return valve is automatically displaced into an open position as a result of a hydraulic pressure corresponding to the pressing position, and the restoring spring moves the moving part. A piston acts on the flow of the hydraulic medium and lowers the pressure such that the return valve is displaced into the closed position.

REFERENCES:
patent: 5111681 (1992-05-01), Yasui et al.
patent: 5727417 (1998-03-01), Moffatt et al.
patent: 5876410 (1999-03-01), Petillo
patent: 6206663 (2001-03-01), Frenken
patent: 6666064 (2003-12-01), LeFavour et al.
patent: 6957560 (2005-10-01), Lefavour et al.
patent: 7216523 (2007-05-01), Frenken
patent: 2009/0133591 (2009-05-01), Frenken
patent: 202 02 200 (2003-06-01), None
patent: 203 05 473 (2003-06-01), None
patent: 1 092 487 (2001-04-01), None
patent: 99/19947 (1999-04-01), None
International Search Report completed on Sep. 2, 2008 with regard to PCT/EP2008/056033; Five (5) pages.

Affiliated with

Also associated with

Rating

Method for the operation of a motor-driven hand-held... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method for the operation of a motor-driven hand-held..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for the operation of a motor-driven hand-held... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4280967