Single-acting manual pump for lubrication line, with deformable

Details Single-acting manual pump for lubrication line, with deformable Single-acting manual pump for lubrication line, with deformable

1998-01-22

2000-08-01

Thorpe, Timothy S.

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

417560, F04B 3910, F04B 5310

Patent

active

060957751

ABSTRACT:
A single-acting manual pump for feeding lubricant to metering units provided in a lubrication line, of the type comprising a body (10) housing a piston (1) movable within a chamber (2) against the action of elastic means (3), and unidirectional valve means (4) provided in correspondence with at least one entry aperture (5) and at least one exit aperture (6) formed in a portion (2A) of said chamber (2), said means being arranged to enable a predefined quantity of lubricant to enter said portion (2A) of the chamber (2) from a reservoir (7) when the piston is raised, and to enable said quantity of lubricant to leave towards a tubular delivery channel (8A, B, C) when the piston (1) is released to return to its rest position by the action of said elastic means. The valve means (4) comprise, at least in correspondence with the entry apertures (5) and exit apertures (6) of said portion (2A) of the chamber (2), valve elements (4A, B) which are at least partially deformable by the effect of the pressure variation generated within said portion (2A) of the chamber (2) by the movement of said piston (1).

REFERENCES:
patent: 2902049 (1959-09-01), Ilfrey et al.
patent: 3179124 (1965-04-01), Haring
patent: 3270687 (1966-09-01), Hettinga
patent: 4185946 (1980-01-01), Mitchell
patent: 4452379 (1984-06-01), Bundschuh
patent: 4489861 (1984-12-01), Saito et al.

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