Rotary expansible chamber devices – Working chamber surface expressed mathematically
Reexamination Certificate
2005-04-19
2009-06-30
Denion, Thomas E (Department: 3748)
Rotary expansible chamber devices
Working chamber surface expressed mathematically
C029S888020, C029S889230
Reexamination Certificate
active
07553143
ABSTRACT:
A method of manufacturing a rotor to be used in a dual-rotor lobe pump system for pumping a material at a periodic rate is provided. The method includes selecting a desired periodic flow rate for the material, selecting a number of lobes for the rotor, and selecting either a thickness of the rotor or a spacing between the dual-rotors' axes of rotation in the lobe pump. The method also includes determining the profile for the rotor based on the desired periodic flow rate, so that when the rotor is operated within the dual-rotor lobe pump system, the material can be pumped at substantially the desired periodic flow rate. In another embodiment of the invention, a lobe pump rotor profile is formed by the method described above.
REFERENCES:
patent: 2897765 (1959-08-01), Kitano
patent: 3327637 (1967-06-01), Hotta
patent: 3371856 (1968-03-01), Thelen et al.
patent: 4145168 (1979-03-01), Smith et al.
patent: 4224015 (1980-09-01), Nagata
patent: 4511316 (1985-04-01), Ellis
patent: 4666384 (1987-05-01), Kaga et al.
patent: 4974318 (1990-12-01), Heppekausen et al.
patent: 5040959 (1991-08-01), Fukagawa
patent: 5152684 (1992-10-01), Steffens
patent: 5336069 (1994-08-01), Matsuyama
patent: 5638600 (1997-06-01), Rao et al.
patent: 6644947 (2003-11-01), Cavanaugh
Daniel C. H. Yang and Shih-His Tong, “The specific flowrate of deviation function based lobe pumps—derivation and analysis”, Oct. 2002, Mechanism and Machine Theory, vol. 37, Issue 10, pp. 1025-1042.
G. Mimmi and P. Pennachhi, “Flow Rate Regularity in Rotary Trochoidal-Lobe Pumps”, 1994, ASME Machine Elements and Machine Dynamics, DE-vol. 71, pp. 295-302.
S. H. Tong, 1998, “New Conjugate Pair Design-Theory and Application”, Ph.D. Dissertation, Mechanical and Aerospace Engineering Department, UCLA, pp. 7-78, 106-111, 119-127, 135-137.
S. H. Tong and D. C. H. Yang, “Lobe Pumps that Deliver Your Desired Flowrate Functions”, Apr. 8, 2004, Research and Technology Review—Department of Mechanical and Aerospace Engineering at University of California, Los Angeles, MAE Abstract, p. 1.
S. H. Tong and D. C. H. Yang, “On the generation of new lobe pumps for higher pumping flowrate”, 2000, Mechanism and Machine Theory, vol. 35, Issue 7, pp. 997-1012.
T. Costopoulos, A. Kanarachos, and E. Pantzis, “Reduction of Delivery Fluctuation and Optimum Tooth Profile of Spur Gear Rotary Pumps”, 1988, Mechanism and Machine Theory, vol. 23, No. 2, pp. 141-146.
Iyoi et al., “Formulae to Obtain Capacity and Effective Work of Positive Displacement Pumps and Their Applications to the Design of Tooth Contours”, Trans. JSME, Nov. 1963, vol. 29, No. 207, pp. 1778-1785 (English translation provided).
Bidhendi, I. M., Et al., “Computer Predictions of Cyclic Excitation Sources for an External Gear Pump,” Computer Aided Design in High Pressure Hydraulic Systems, Mechanical Engineering Publications, London, 1983, pp. 23-29.
Dillon, M. L. et al., “Predicting Flowrates from Positive Displacement Rotary Pumps”, Chemical Engineering (New York), N. 15, vol. 82, 1985, pp. 57-60.
Liu, Hung-Cheng et al., “Trapping-Free Rotors for High Sealing Lobe Pumps”, Trans. ASME Journal of Mechanical Design, vol. 122, No. 4, 2000, pp. 536-542.
Mimmi, G., “Experimental Investigation of Flow Rate Irregularity in Rotary Gear Pumps,” Proceedings, VI ASME International Power Transmission and Gearing Conference, 1992, Scottsdale AZ., pp. 283-289.
Tong, S.H. et al., “Generation of Identical Noncircular Pitch Curves”, ASME Journal of Mechanical Design, vol. 120, No. 2, 1998, pp. 337-341.
Yang, D. C. et al., “Deviation-Function Based Pitch Curve Modification For Conjugate Pair Design”, ASME Journal of Mechanical Design, 1999, vol. 121, No. 4, pp. 579-586.
Dickenson, T.C., “Pumping Manual”, 9th Elsevier Science, Ltd. 1995, pp. 243-280.
Tong Shih-Hsi
Yang Daniel C. H.
Christie Parker & Hale LLP
Davis Mary A
Denion Thomas E
The Regents of the University of California
LandOfFree
Lobe pump system and method of manufacture does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lobe pump system and method of manufacture, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lobe pump system and method of manufacture will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4146386