Oil well pump with self-contained lubrication

Details Oil well pump with self-contained lubrication Oil well pump with self-contained lubrication

1976-08-10

1978-04-18

Freeh, William L.

Pumps

Expansible chamber type

Valved piston

92 865, F04B 2104, F01B 3100

Patent

active

040849252

ABSTRACT:
The oil well pump includes upper and lower seals at the upper and lower end portions of a plunger reciprocable within the pump barrel. Passages are provided in the wall of the plunger for introducing a lubricating fluid in the annular space between the outer wall of the plunger and the inner wall of the barrel between the upper and lower seals. These passages are subsequently sealingly closed to trap the lubricating fluid in the annular volume and thereby provide lubrication for the pump.

REFERENCES:
patent: 1083957 (1914-01-01), Trist
patent: 1160840 (1915-11-01), Calvert
patent: 1457546 (1923-06-01), Namura
patent: 1660210 (1926-09-01), Ashton
patent: 1690393 (1928-11-01), Beloit
patent: 1949612 (1934-03-01), Mattair et al.
patent: 2349253 (1944-05-01), Edmund
patent: 2371846 (1945-03-01), Ruthven
patent: 3104619 (1963-09-01), Swarthout
patent: 3267872 (1966-08-01), Bloudoff
patent: 3592567 (1971-07-01), Tolbert

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