Boots – shoes – and leggings
Patent
1987-08-03
1989-08-29
Lall, Parshotam
Boots, shoes, and leggings
73 54, 73599, 364556, G01N 1100, G01N 2902
Patent
active
048623849
ABSTRACT:
The dynamic viscosity of a viscous medium is measured by positioning an acoustic transducer in the temperature and pressure environment of the medium and spaced from the medium, then measuring a first resonant frequency and bandwidth for acoustic shear wave propagation within the transducer. The transducer is then positioned in surface contact with the medium, and a second resonant frequency and bandwidth are measured. The viscosity of the medium is calculated from the difference between the first and second resonant frequencies and bandwidths. The step of measuring a first resonant frequency and bandwidth involves applying a first input signal to the transducer to generate acoustic shear waves within the transducer, measuring the frequency and amplitude of the output signal produced by the transducer in response to the acoustic shear waves, and repeating the steps of applying and measuring for a range of first input signal frequencies to determine a first resonant frequency and bandwidth for the transducer. Similarly, the step of measuring a second resonant frequency and bandwidth includes applying a second input signal to the transducer to generate acoustic shear waves within the transducer, measuring the frequency and amplitude of the output signal produced by the transducer in response to the acoustic shear waves, and repeating the steps of applying and measuring for a range of second input signal frequencies to determine a second resonant frequency and bandwidth for the transducer.
REFERENCES:
patent: H465 (1988-05-01), Brown
patent: 2707391 (1955-05-01), McSkimin
patent: 2735662 (1956-07-01), Swengel
patent: 3194057 (1965-07-01), Richard
patent: 3382706 (1968-05-01), Fitzgerald et al.
patent: 3435664 (1969-04-01), Harris
patent: 3553636 (1971-01-01), Baird
patent: 3751974 (1973-08-01), Urbas
patent: 4193291 (1980-03-01), Lynnworth
patent: 4312228 (1982-01-01), Wohltjen
patent: 4341111 (1982-07-01), Husar
patent: 4441358 (1984-04-01), Osborne
patent: 4505154 (1985-03-01), Wiesner
patent: 4558588 (1985-12-01), Beaudoin et al.
patent: 4559810 (1985-12-01), Hinrichs et al.
patent: 4602505 (1986-07-01), Kanda et al.
patent: 4612800 (1986-09-01), Erian
patent: 4630465 (1986-12-01), Hatton
patent: 4662222 (1987-05-01), Johnson
patent: 4721874 (1988-01-01), Emmers
Donald L. Hunston, "Determination of the High Frequency Viscoelastic Properties of Polymers Using Shear Mode Strip Delay Lines", 12/1971, J. Polymer Sci: Part C, No. 35, pp. 201-210.
Lea et al., The Transverse Acoustic Impedance of an Inhomogeneous Viscous Fluid, Ultrasonics, vol. 23 (May 1985).
Harrison et al., Dynamic Viscosity Measurement in Methods of Experimental Physics: Ultrasonics, vol. 19, Chapter 3, pp. 137-178 (Academic Press 1981).
Bujard Martial R.
Tittmann Bernhard R.
Deinken John J.
Hamann H. Frederick
Lall Parshotam
Malin Craig O.
Melnick S. A.
LandOfFree
Method of measuring the dynamic viscosity of a viscous fluid uti 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 of measuring the dynamic viscosity of a viscous fluid uti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of measuring the dynamic viscosity of a viscous fluid uti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2244917