Changover valve
AssigneeDyson Limited
InventorsAndrew Walter McRae Thomson, Peter David Gammack, Robert Brian Seaman
Life of this patent
Estimating the term…
Abstract
A changeover valve comprises a first valve member and a second valve member. The first value member has an aperture. The second valve member has first and second apertures. The first valve member is movable relative to the second valve member for selective alignment of the first value member aperture with one or other of the apertures of the second valve member. The value also has a ramp and follower means for automatically moving the valve member away from the one another during changeover movement of the first valve member relative to the second valve member so that wear on the surfaces of the valve members is minimized.
Claims18
A changeover valve comprising a first valve member having an aperture, a second valve member having two apertures, the first valve member being movable relative to the second valve member for selective alignment of the first valve member apertures with one of the apertures of the second valve member, and ramp and follower means for automatically moving the first and second valve members away from one another during changeover movement of the first valve member relative to the second valve member.
A changeover valve, comprising a first valve member having an aperture, a second valve member having two apertures, the first valve member being movable relative to the second valve member for selective alignment of the first valve member apertures with one of the apertures of the second valve member, ramp and follower means for automatically moving the first and second valve members away from one another during changeover movement of the first valve member relative to the second valve member and releasable locking means for releasably locking the first valve member in alignment with a second aperture of the second valve member,
- wherein the releasable locking means comprises a catch on the first valve member engageable, in use, with a catch adjacent the second aperture of the second valve member.
Apparatus comprising a changeover valve comprising a first valve member having an aperture, a second valve member having two apertures, the first valve member being movable relative to the second valve member for selective alignment of the first valve member apertures with one of the apertures of the second valve member, ramp and follower means for automatically moving the first and second valve members away from one another during changeover movement of the first valve member relative to the second valve member, releasable locking means for releasably locking the first valve member in alignment with a second aperture of the second valve member and a catch adjacent the second aperture of the second valve member engageable with the first valve member.
Dependencies are inferred from the claim text.