Method of and means for conveying and measuring gases for gas an

Details Method of and means for conveying and measuring gases for gas an Method of and means for conveying and measuring gases for gas an

1976-07-23

1981-05-19

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Responsive to pump or pump fluid temperature

318471, 318334, F04B 4906, H02P 528

Patent

active

042682240

ABSTRACT:
This invention relates to a method of and means for conveying and measuring gases for gas analysis operations by means of a pump, which conveys the gas with constant volume per working cycle. The means for this purpose, as used in connection with gas analysis instruments, consists of a cyclically operating gas delivery pump with an electric motor drive which is connected to a frequency transmitter for pre-setting the speed of rotation.

REFERENCES:
patent: 2424344 (1947-07-01), Veinott
patent: 3384801 (1968-05-01), Rodgers
patent: 3475677 (1969-10-01), Swinehart et al.
patent: 3492946 (1970-02-01), Martin
patent: 3501899 (1970-03-01), Allor
patent: 3544236 (1969-03-01), BRookmire

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