Differential pressure sensor comprising a symmetric error in...

Details Differential pressure sensor comprising a symmetric error in... Differential pressure sensor comprising a symmetric error in...

2007-10-09

2007-10-09

Lefkowitz, Edward (Department: 2855)

Measuring and testing

Fluid pressure gauge

Diaphragm

C073S723000

Reexamination Certificate

active

10522786

ABSTRACT:
A pressure-difference sensor, which is asymmetrical by design, includes a measuring apparatus having a first half-chamber with a first volume V1, which is sealed by a first separating membrane having a first membrane stiffness E1, and a second half-chamber with a second volume V2, which is sealed by a second separating membrane having a second membrane stiffness E2, wherein the first half-chamber is separated from the second half-chamber by a pressure sensitive element, especially a measuring membrane, and the first half-chamber is filled with a first transfer liquid having a first coefficient of thermal expansion α1and the second half-chamber is filled with a transfer liquid having a second coefficient of thermal expansion α2. For making the temperature-dependent, separating-membrane pressure-error dP symmetrical, the design is so embodied that a first product of the first membrane stiffness, the first volume and the first coefficient of thermal expansion is essentially equal to a second product of the second membrane stiffness, the second volume and the second coefficient of thermal expansion (E1*V1*α1=E2*V2*α2), wherein, additionally, at least one factor of the first product deviates, by design, from the corresponding factor of the second product.

REFERENCES:
patent: 4086815 (1978-05-01), Asano et al.
patent: 4612812 (1986-09-01), Broden
patent: 5804735 (1998-09-01), Biskup
patent: 7073385 (2006-07-01), Troyer
patent: 7171851 (2007-02-01), Kamata

Affiliated with

Also associated with

Rating

Differential pressure sensor comprising a symmetric error in... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Differential pressure sensor comprising a symmetric error in..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Differential pressure sensor comprising a symmetric error in... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3864866