Sealing arrangement for a valve and more particularly one in the form of a multi-way valve
AssigneeFesto AG & Co.
InventorsKurt Stoll, Manfred Rudle
Life of this patent
Estimating the term…
Abstract
A sealing arrangement for valve has at least one sealing ring, which has a substantially U-like cross section of its housing ring, which is made up of a plurality of parts which are permanently connected together. In the ring space of the housing ring a single, integral sealing element is mounted so as to be able to yield radially and with the housing ring it constitutes a component which may be uniformly handled. A sealing part thereof extends out of the housing opening of the ring space. A sealing ring of this type may be locked in valve housings in order to provide a sealing action between the valve housing and the moving valve piston. The design of the sealing rings makes them suitable for robotized assembly.
Claims18
A self-supporting annular seal unit for providing a seal between a valve housing and an axially-directable valve piston positioned in said valve housing comprising:
- an annular housing ring having an outer circumferential surface dimensioned for press-fitting within said valve housing and having an annular ring space opening radially inward;
- an annular sealing element positioned in said ring space and having a sealing lip projecting radially inward for sealingly contacting said piston;
- and
- wherein said housing ring is formed from at least two parts to allow loading of said sealing element into said ring space when said housing ring is unassembled, said housing ring including means for retaining said sealing element within said housing ring.
A self-supporting annular seal unit for providing a seal between a valve housing and an axially-directable valve piston positioned in said valve housing comprising:
- an annular housing ring capable of being press-fit within said valve housing and having an annular ring space opening radially inward;
- an annular sealing element positioned in said ring space and having a sealing lip projecting radially inward for sealing contacting said piston, said sealing element also having a pair of axially-extending retainer spurs which hook onto a housing step formed in said housing ring in order to permanently retain said sealing element;
- and
- wherein said housing step is formed by the intersection of an axially-extending widened section and a radially-extending slot-like section;
- and
- wherein both said sealing element and said ring space of said housing ring have a substantially T-like cross-section, the radial length of said sealing lip being greater than the combined axial length of said retainer spurs;
- and
- wherein said housing ring is formed from at least two parts to allow loading of said sealing element into said ring space when said housing ring is unassembled.
A spool valve comprising:
- a valve housing having a piston-receiving recess therein;
- an axially-directable valve piston positioned in said piston-receiving recess;
- at least one self-supporting annular seal unit positioned in said piston-receiving recess for providing a seal between said valve housing and said piston;
- and
- wherein said annular seal unit comprises:
- an annular housing ring having an outer circumferential surface dimensioned for press-fitting within said valve housing and having an annular ring space opening radially inward;
- an annular sealing element positioned in said ring space and having a sealing lip projecting radially inward for sealingly contacting said piston;
- and
- wherein said housing ring is formed from at least two parts to allow loading of said sealing element into said ring space when said housing ring is unassembled, said housing ring including means for retaining said sealing element within said housing ring.
Dependencies are inferred from the claim text.