Measuring and testing – Vibration – By mechanical waves
Patent
1978-06-15
1980-04-01
Yasich, Daniel M.
Measuring and testing
Vibration
By mechanical waves
324220, G01N 2904
Patent
active
041955293
ABSTRACT:
The disclosed device comprises two support end assemblies formed as cup-shaped sleeves adapted to be alternatingly engaged with the internal surface of a pipeline and interconnected by a motion member. The lateral surface of each sleeve defines and annular chamber with an elastic sheath thereby. The two sleeves are interconnected by a bellows fixed between the bottoms of the sleeves. The annular chambers and the bellows are connected to an air-compressor through an automatic control system arranged so that at the initial stage of a successive advancing step the leading chamber communicates with the ambient atmosphere, while the trailing chamber and the bellows are communicated to the pressure connection of the compressor, whereas at the final stage of the step the trailing chamber and the bellows are communicated with the suction connection of the compressor, while the leading chamber is under pressure.
REFERENCES:
patent: 2622125 (1952-12-01), Bender
patent: 3439527 (1969-04-01), Rohrer
patent: 3754275 (1973-08-01), Carter et al.
patent: 3940689 (1976-02-01), Johnson, Jr.
patent: 4052887 (1977-10-01), Sheridan et al.
patent: 4063157 (1977-12-01), Lorenzi
patent: 4105972 (1978-08-01), Smith
Kantsedalov Viktor G.
Madoian Ashot A.
Samoilenko Petr B.
Samoilenko Valentin P.
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