Scraper rings
AssigneeAeplc
InventorAlfred Hill
Life of this patent
Estimating the term…
Abstract
A scraper ring system for removing fluid from a relatively moving cylindrical surface such as a piston rod which comprises a series of overlapping blades or leaves which are pressed against the rod surface at an acute angle either by a garter spring or when the blades are part of a continuous strip, by the natural resilience of the strip and blades. The blades are located in a housing and passages are provided for the discharge of any removed fluid.
Claims21
A scraper ring system for removing fluid from a relatively moving cylindrical surface said system comprising a plurality of overlapping blades each of said blades having a contact edge arranged to press against said cylindrical surface at an acute angle to the axis of said cylindrical surface, the apex of said acute angle pointing in a direction opposite to the relative motion of said cylindrical surface when material is to be removed therefrom;
- said blades forming part of a continuous strip.
A scraper ring for removing fluid from a relatively moving cylindrical surface said ring comprising:
- an annular housing surrounding said cylindrical surface and radially spaced from said surface, a plurality of resilient blades secured to said housing in overlapping relationship;
- each of said blades having a radially inner circular edge in contact with the cylindrical surface, said blades being resilient and arranged to form a circular inner edge of a diameter normally less than that of said cylindrical surface whereby the blades are caused by the cylindrical surface to bend in the axial direction of the cylindrical surface with the resilience of said blades holding them in scraping contact with and at an acute angle to the cylindrical surface, the apex of the acute angle assumed by the blades pointing in a direction opposite to the direction of motion of the cylindrical surface when material is to be scraped from that surface.
A scraper ring for removing fluid from a relatively moving cylindrical surface said ring comprising:
- an annular housing radially spaced from said surface, a plurality of resilient blades secured to said housing in overlapping relationship;
- each of said blades having a radial edge in contact with the cylindrical surface, said radial edge being spaced from said housing, said blades being resilient and arranged to from a circle of a diameter different from that of said cylindrical surface and creating an annular area of interfering overlap between the blades and the cylindrical surface whereby the blades are caused by the cylindrical surface to bend in the axial direction of the cylindrical surface with the resilience of said blades holding them in scraping contact with and at an acute angle the cylindrical surface, the apex of the acute angle assumed by the blades pointing in a direction opposite to the direction of movement of the cylindrical surface when material is being scraped from the surface.
Dependencies are inferred from the claim text.