Tapping point clearing apparatus
AssigneeClearGuard IPCo Pty Ltd
InventorHans Ernst Sauer
Life of this patent
Estimating the term…
Abstract
A clearing head 10 includes annular scraper edge (12) and rows of openings (14, 16). A clearing tool (100) has a one-piece combined shaft (24) and clearing head (10). Wiper ring (49) includes inner first material 49a around an opening (49c) for the shaft (24). The first material may have molybdenum/molybdenum disulphide. A resilient second material 49b is provided around the first material. The resilient second material is or includes FKM. In a ram (38), the resilient second material can exert inward radial pressure to the first material by reacting against a ram interior wall (39). The ram can incline from horizontal and vertical by an angle α e.g. between at least 10° and 80°, or between at least 20° and 70°, or between at least 30° and 60°, or between at least 25° and 45°, or around 30°.
Claims14
A tapping point clearing apparatus comprising:
- a ram, the ram comprising a clearing tool, the clearing tool comprising:
- a clearing head, the clearing head comprising:
- a side wall, the side wall defining:
- a front opening;
- at least one side wall opening;
- and
- a flow path between the at least one side wall opening and the front opening for purge fluid to flow through the clearing head;
- and
- a scraper edge for removal of build-up/scale from a tapping point;
- and
- a shaft;
- and
- a wiper ring for, in use, wiping the shaft of the clearing tool, the wiper ring having a composite structure including:
- a first material around a central opening of the wiper ring;
- and
- a second material at least partially around the first material, the second material being resilient and providing an external periphery of the wiper ring;
- wherein the clearing head is permanently connected to the shaft;
- and
- wherein:
- the first material includes metal or is of metal or is metal based;
- the first material includes molybdenum;
- the first material includes molybdenum disulphide impregnated polyurethane;
- the second material includes a synthetic rubber and/or fluoropolymer elastomer;
- and/or
- the second material includes FKM.
Dependencies are inferred from the claim text.