Leakage prevention means for a positive displacing machine

Details Leakage prevention means for a positive displacing machine Leakage prevention means for a positive displacing machine

1977-12-07

1980-01-08

Smith, Leonard E.

Rotary expansible chamber devices

With mechanical sealing

Axially movable end wall or end wall portion

418149, F04C 1500

Patent

active

041826027

ABSTRACT:
A positive displacing machine has a housing having an interior chamber provided with an open end, a cover closing the open end of the chamber, movable working members located in the chamber and in operation producing high pressure in the same, sealing means including an annular groove formed in one of the elements around the open end of the chamber and a sealing member received in the groove, and a further annular groove formed in one of the elements radially outwardly of the first-mentioned groove and communicating with a space which is under pressure lower than the pressure in the interior chamber of the housing. The housing may have two open ends closed by two covers, and the above grooves may be provided in both end portions thereof. The grooves may be formed both in the housing, and in the covers. The further grooves may be open at a circumferential surface of the housing.

REFERENCES:
patent: 711239 (1902-10-01), Tree
patent: 3035554 (1922-05-01), Selzler
patent: 3053191 (1962-09-01), Weigert
patent: 3473476 (1969-10-01), Davidson

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