PISTON SEAL

In an assembly, e.g. a fluid pump, comprising an elongate member (e.g. a displacement rod (16)) slidably disposed with respect to a sealing member (e.g. seal (18)) the elongate member comprises a resiliently deformable sleeve or coating (74) and the sealing member (18) is substantially rigid and eng...

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Bibliographic Details
Main Author EVERITT, DAVID, GEOFFREY
Format Patent
LanguageEnglish
French
Published 17.05.2001
Edition7
Subjects
BLASTING
CYLINDERS
ENGINEERING ELEMENTS AND UNITS
GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS
HEATING
LIGHTING
MECHANICAL ENGINEERING
PISTONS
POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS
PUMPS
PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
SEALINGS
THERMAL INSULATION IN GENERAL
WEAPONS
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Summary:In an assembly, e.g. a fluid pump, comprising an elongate member (e.g. a displacement rod (16)) slidably disposed with respect to a sealing member (e.g. seal (18)) the elongate member comprises a resiliently deformable sleeve or coating (74) and the sealing member (18) is substantially rigid and engages the sleeve or coating (74) and resiliently deforms in the region of contact. There may also be means (82, 300, 352) for removing unwanted deposits from the elongate member. La présente invention concerne un ensemble, par exemple une pompe, qui comprend un élément effilé (par exemple une tige de piston (16)) montée coulissante par rapport à un élément d'étanchéité (par exemple un joint (18)). Cet élément effilé comprend un manchon déformable souple ou revêtement (74) et l'élément d'étanchéité (18) sensiblement rigide est en contact avec ce manchon ou revêtement (74) déformé de façon élastique au niveau de la zone de contact. Il peut aussi exister un organe (82, 300, 352) destiné à retirer les dépôts indésirables de l'élément effilé.
Bibliography:Application Number: WO2000GB04325