Relief valve cavity
AssigneeCaterpillar Inc.
InventorsMikhail A. Sorokin, Salik Abdul Syed, Wesley Thomas Payne
Life of this patent
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Abstract
A valve body defines a work passage, a high-pressure channel fluidly connected to the work passage, a tank passage, and a cavity disposed between the high-pressure channel and the tank passage. The cavity fluidly connects the high-pressure channel and the tank passage. The cavity is defined at least in part by a first portion within which a relief valve threadedly engages, a second portion disposed adjacent to the high-pressure channel, and an annulus interposed between the first portion and the second portion. The annulus fluidly connects to the tank passage. A surface area of the relief valve exposed to the annulus is greater than a cross-sectional area of the high-pressure channel.
Claims20
A hydraulic valve assembly, comprising:
- a valve body defining:
- a first work passage configured to fluidly connect to a pump, the first work passage including a first attachment port configured to fluidly connect to a first hydraulic line;
- a second work passage configured to fluidly connect to the pump, the second work passage including a second attachment port configured to fluidly connect to a second hydraulic line;
- a first tank passage and a second tank passage, wherein the first tank passage and the second tank passage are configured to fluidly connect to a fluid tank;
- a first cavity having a first annulus fluidly connected to the first tank passage;
- a second cavity having a second annulus fluidly connected to the second tank passage;
- a first high-pressure channel fluidly connected to the first work passage and the first cavity;
- and
- a second high-pressure channel fluidly connected to the second work passage and the second cavity;
- a first relief valve having a first distal end at least partly disposed in the first high-pressure channel and a first proximal end disposed external to the valve body, the first relief valve including a first surface area exposed to the first annulus of the first cavity, wherein the first surface area of the first relief valve is at least two times greater than a first cross-sectional area of the first high-pressure channel;
- and
- a second relief valve having a second distal end at least partly disposed in the second high-pressure channel and a second proximal end disposed external to the valve body, the second relief valve including a second surface area exposed to the second annulus, wherein the second surface area of the second relief valve is at least two times greater than a second cross-sectional area of the second high-pressure channel.
A valve body, comprising:
- a work passage;
- a high-pressure channel fluidly connected to the work passage;
- a tank passage;
- and
- a cavity disposed between the high-pressure channel and the tank passage, the cavity fluidly connecting the high-pressure channel and the tank passage, the cavity including:
- a first portion within which a relief valve threadedly engages;
- a second portion disposed adjacent to the high-pressure channel;
- and
- an annulus at least partly disposed between the first portion and the second portion, the annulus fluidly connected to the tank passage, and wherein a surface area of the relief valve exposed to the annulus is at least two times greater than a cross-sectional area of the high-pressure channel.
A valve assembly, comprising:
- an attachment point for a hydraulic line;
- a valve;
- and
- a valve body defining:
- a work passage fluidly connected to the attachment point;
- a cavity fluidly connected to the work passage via a high-pressure channel, the cavity including an annulus;
- and
- a tank passage fluidly connected to the cavity via the annulus, wherein the valve is disposed in the cavity such that a surface area of the valve is exposed to the annulus, wherein the surface area of the valve exposed to the annulus is at least two times greater than a cross-sectional area of the high-pressure channel.
Dependencies are inferred from the claim text.