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US 2014/0150907 A1Published application
Hydraulic Coupling Member With Pressure-Relieving Poppet Valve
AssigneeNational Coupling Company, Inc.
InventorRobert E. Smith, III
Life of this patent
Estimating the term…
Abstract
A poppet valve for a hydraulic coupling member has an internal, spring-loaded check valve (which may be a ball check valve) in fluid communication with a bleed passage. The check valve may be configured as a pressure-relief valve which bleeds off excess hydraulic fluid pressure within the coupling member to a preselected value. A poppet valve according to the invention may be used in female coupling members and/or male coupling members. Certain embodiments of the invention may be retrofitted to coupling members of the prior art.
Claims22
A poppet valve for a hydraulic coupling comprising:
- a poppet valve body having a first, sealing portion in the shape of a conical frustum and a second, generally cylindrical portion adjacent the first portion and having a stepped outer diameter comprising
- a first section having a first outer diameter,
- a second section adjacent the first section and having a second outer diameter greater than the first outer diameter,
- a third section adjacent the second section and having a third outer diameter less than the second outer diameter,
- a first shoulder between the first section and the second section, and
- a second shoulder between the second section and the third section;
- at least one through hole in the second section open at a first end to the first shoulder and open at a second, opposing end to the second shoulder;
- a central axial cavity in the poppet valve body that is substantially closed at a first end thereof and open at an opposing second end;
- and,
- a pressure-relief valve within that portion of the central axial cavity that is situated in the second, generally cylindrical portion of the poppet valve body.
7 more elements
A female hydraulic coupling member comprising:
- a generally cylindrical body having a central, axial bore;
- a receiving chamber at a first end of the central axial bore configured to receive the probe member of a corresponding male hydraulic coupling member;
- fluid connection means at an opposing second end of the central axial bore configured to connect to a hydraulic fluid conduit;
- and,
- a pressure-relieving poppet valve within the central axial bore intermediate the first end and second end thereof that comprises;
- a poppet valve body having a first, sealing portion in the shape of a conical frustum and a second, generally cylindrical portion adjacent the first portion and having a stepped outer diameter comprising
- a first section having a first outer diameter,
- a second section adjacent the first section and having a second outer diameter greater than the first outer diameter,
- a third section adjacent the second section and having a third outer diameter less than the second outer diameter,
- a first shoulder between the first section and the second section, and
- a second shoulder between the second section and the third section;
- at least one through hole in the second section open at a first end to the first shoulder and open at a second, opposing end to the second shoulder;
- a central axial cavity in the poppet valve body that is substantially closed at a first end thereof and open at an opposing second end;
- and,
- a pressure-relief valve within that portion of the central axial cavity that is situated in the second, generally cylindrical portion of the poppet valve body.
12 more elements
A male hydraulic coupling member comprising:
- a generally cylindrical body having a central, axial bore;
- a probe member at a first end of the generally cylindrical body configured to engage the receiving chamber of a corresponding female hydraulic coupling member;
- fluid connection means at an opposing second end of the generally cylindrical body and in fluid communication with the central axial bore configured to connect to a hydraulic fluid conduit;
- and,
- a pressure-relieving poppet valve within the central axial bore intermediate the first end and second end thereof that comprises;
- a poppet valve body having a first, sealing portion in the shape of a conical frustum and a second, generally cylindrical portion adjacent the first portion and having a stepped outer diameter comprising
- a first section having a first outer diameter,
- a second section adjacent the first section and having a second outer diameter greater than the first outer diameter,
- a third section adjacent the second section and having a third outer diameter less than the second outer diameter,
- a first shoulder between the first section and the second section, and
- a second shoulder between the second section and the third section;
- at least one through hole in the second section open at a first end to the first shoulder and open at a second, opposing end to the second shoulder;
- a central axial cavity in the poppet valve body that is substantially closed at a first end thereof and open at an opposing second end;
- and,
- a pressure-relief valve within that portion of the central axial cavity that is situated in the second, generally cylindrical portion of the poppet valve body.
12 more elements
Dependencies are inferred from the claim text.