Pressure fluid actuated lubricator

A pressure fluid actuated lubricator comprising a housing (46) having at least one pressure fluid channel (43, 42, 21) leading from an inlet opening (2) to an outlet opening (7) in said housing, a reservoir (44) for a lubricant (45) and a discharge device (19) for said lubricant provided in said housing, said discharge device communicating both with said reservoir and with a portion (21) of said channel which portion connects with said outlet opening,

• characterized therein that an end part (5) of said housing (46) is provided with a substantially cylindrical first portion (10) terminating in a second, substantially cylindrical portion (11), said portions extending into said housing and said first cylindrical portion having a smaller diameter than said second cylindrical portion, an opening (42) being provided in a side of said first cylindrical portion to communicate with said channel portion (21) connecting with said outlet opening, said reservoir (44) being shaped as a cylindrical reservoir (12) which is closed at one end and which with an opposite, open end is passed over said second cylindrical portion which functions as a stationary piston along which said cylindrical reservoir is movable in a longitudinal direction, and a sealing member (13) provided between said cylindrical second portion and said cylindrical reservoir, wherein said pressure fluid passes between an inner wall of the open end of the cylindrical reservoir and said smaller diameter first cylindrical portion, through said opening defined in said first cylindrical portion and through said channel portion connecting with said outlet opening when said cylindrical reservoir is moved relative to said second cylindrical portion.