Nipple with relief valve
AssigneeCejn AB
InventorsFrank Rottgardt, Jörgen Ekström, Anna-Lena Olsson
Life of this patent
Estimating the term…
Abstract
A nipple that includes: a fluid passage; a housing; a valve for the fluid passage; and a relief valve for the valve. The relief valve may include: a first sleeve axially movable for sealing against a first seal of the housing; a second sleeve for sealing against a second seal of the housing; and a third seal for sealing between the first sleeve and the second sleeve. Relative axial movement between the first sleeve and the second sleeve opens or closes, respectively by the direction of the axial movement. The relief valve, the first seal, and the third seal are arranged at a set radial distance from a central axis of the fluid passage.
Claims16
A nipple comprising:
- a fluid passage;
- a housing;
- a valve for the fluid passage;
- a relief valve for the valve, the relief valve comprising:
- a first sleeve axially movable for sealing against a first seal of the housing;
- a second sleeve for sealing against a second seal of the housing;
- and
- a third seal for sealing between the first sleeve and the second sleeve;
- wherein relative axial movement between the first sleeve and the second sleeve opens or closes, respectively by the direction of the axial movement, the relief valve;
- wherein the relief valve, the first seal, and the third seal are arranged at a set radial distance from a central axis of the fluid passage.
A nipple comprising:
- an inner fluid passage;
- an outer fluid passage coaxial with the inner fluid passage;
- a housing;
- an inner valve for the inner fluid passage;
- an outer valve for the outer fluid passage;
- an outer relief valve for the outer valve, the outer relief valve comprising:
- a first sleeve axially movable for sealing against a first seal of the housing;
- a second sleeve for sealing against a second seal of the housing;
- and
- a third seal for sealing between the first sleeve and the second sleeve;
- wherein relative axial movement between the first sleeve and the second sleeve opens or closes, respectively by the direction of the axial movement, the outer relief valve;
- and
- the first seal and the third seal are arranged on a same radial distance from a common axis of the inner fluid passage and the outer fluid passage.
A method to manufacture a nipple providing relief of an internal pressure acting on a relief valve of the nipple, the method including:
- arranging two seals at a first radial distance from a central axis of the nipple;
- wherein each of the two seals seals a movable sleeve for closing or opening the relief valve;
- providing a safety lock between the nipple and a coupling comprising a locking sleeve and locking balls for establishing a locked connection between the nipple and the coupling;
- wherein unlocking the safety lock includes unlocking the coupling and the nipple only when first pushing the coupling and the nipple towards each other, and secondly pushing the locking sleeve of the coupling away from the nipple.
A system comprising:
- a hydraulic tool;
- and
- a nipple to couple the hydraulic tool to a co-axial hose;
- the nipple comprising:
- a fluid passage;
- a housing;
- a valve for the fluid passage;
- a relief valve for the valve, the relief valve comprising:
- a first sleeve axially movable for sealing against a first seal of the housing;
- a second sleeve for sealing against a second seal of the housing;
- and
- a third seal for sealing between the first sleeve and the second sleeve;
- wherein relative axial movement between the first sleeve and the second sleeve opens or closes, respectively by the direction of the axial movement, the relief valve;
- wherein the relief valve, the first seal, and the third seal are arranged at a set radial distance from a central axis of the fluid passage.
Dependencies are inferred from the claim text.