Thick matter pump

Details Thick matter pump Thick matter pump

2005-08-16

2005-08-16

Tyler, Cheryl (Department: 3746)

Pumps

Motor driven

Fluid motor

C417S063000, C417S400000, C417S342000, C417S344000, C417S345000, C417S347000

Reexamination Certificate

active

06929454

ABSTRACT:
In a thick matter pump, especially for delivering concrete, comprising two delivery cylinders, it is known to provide two position sensors in one of the two cylinders for control of the pistons. However, leakage of hydraulic fluid can lead to an imbalance of the two cylinders. In the invention two position sensors (52′, 52″) are provided, which are arranged at a defined distance from one of the ends of the drive cylinders and which respond to a drive piston (30′, 30″) that is passing by. To prevent the formation of concrete clots inside the delivery cylinders (10) and to prevent the occurrence of a slamming when the drive pistons (30′, 30″) reach their end of travel, the invention provides that both position sensors (52′, 52″) are arranged at a distance from the piston rod-side ends of both drive cylinders (24′, 24″) and, in addition, a correcting sensor (54) is arranged at a defined distance from the piston head-side end of one of the drive cylinders (24′). This correcting sensor can be temporarily activated for initiating a reversing process overruling the rod-side position sensor (52″) of the other drive cylinder (24″).

REFERENCES:
patent: 3994627 (1976-11-01), Calzolari
patent: 4490096 (1984-12-01), Box
patent: 5332366 (1994-07-01), Anderson
patent: 5344290 (1994-09-01), Benckert
patent: 5458470 (1995-10-01), Mannhart et al.
patent: 6100608 (2000-08-01), Takahashi
patent: 6171075 (2001-01-01), Munzenmaier et al.
patent: 6299416 (2001-10-01), Kwag
patent: 6454542 (2002-09-01), Back
patent: 6712587 (2004-03-01), Gerhardt et al.
patent: 38 34 678 (1990-04-01), None
patent: 197 16 030 (1998-03-01), None
patent: 19716030 (1998-03-01), None
patent: 0 446 206 (1989-07-01), None
patent: WO 90/06444 (1990-06-01), None

Affiliated with

Also associated with

Rating

Thick matter pump does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Thick matter pump, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Thick matter pump will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3460576