| US 7,537,244 B2 | ||
| Fluid fitting assembly | ||
| James D. Gibson, Huntsville, Ala. (US); and Le Yu, Hilliard, Ohio (US) | ||
| Assigned to Parker Hannifin Corporation, Cleveland, Ohio (US) | ||
| Filed on Feb. 23, 2007, as Appl. No. 11/678,302. | ||
| Claims priority of provisional application 60/776170, filed on Feb. 23, 2006. | ||
| Prior Publication US 2007/0194569 A1, Aug. 23, 2007 | ||
| Int. Cl. F16L 41/00 (2006.01) | ||
| U.S. Cl. 285—220 [285/355; 285/212] | 18 Claims |
| 1. A fluid fitting assembly comprising a receiving member, a fitting member, and a seal member; wherein:
the receiving member comprises a body and a port in the body, the port including an internal thread section and a chamfer
section between a port-surrounding surface of the body and the internal thread section;
the fitting member comprises a head and a shank, the shank including an external thread section and an undercut section between
the head and the external thread section;
the fitting member is coupled to the receiving member and the respective thread sections are screwed together whereby the
chamfer section of the receiving member and the undercut section of the fitting member form a chamber in the port within which
the seal member is positioned;
the seal member comprises a ring portion and a shoulder portion extending radially from a head-adjacent region of the ring
portion;
the outer radial surface of the ring portion forms a chamfer-seating surface which seats against the chamfer section of the
receiving member;
the head-adjacent axial surface of the shoulder portion forms an undercut-seating surface which seats against the undercut
section of the fitting member;
the ring portion has an interference geometry relative to the chamfer section of the receiving member and/or the shoulder
portion has an interference geometry relative to the undercut section of the fitting member, whereby the seal member acts
in a spring-like manner, pressing the seating surface against the chamber section and the undercut section, respectively;
and
wherein, when the port in the receiving member communicates with a volume of pressurized fluid, the inner radial surface of
the ring portion and the thread-adjacent axial surface of the shoulder portion form a fluid-contacting surface against which
fluid will push to further urge the seating surfaces towards the chamfer section and the undercut section;
wherein the ring portion has an interference geometry relative to the chamfer section of the receiving member having an interference
overlap in the range of 0.001 to 0.010 inch.
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