Patents by Inventor Seiya Umeno

Seiya Umeno has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Boot having inwardly curved flanks
    Patent number: 5599029
    Abstract: A universal joint boot having a high degree of ability to withstand radial expansion. The boot (10) includes a bellows structure (16) having alternating ridges (26) and valleys (28) interconnected by flank portions (30). The flank portions (30) are curved inwardly of the boot and have a varying wall thickness that increases from the ridges (26) toward the valley (28). The valley portion (28) is defined by a U-shaped annular groove (34) to reduce the wall thickness thereby to improve the flexibility.
    Type: Grant
    Filed: October 12, 1995
    Date of Patent: February 4, 1997
    Assignee: NOK Corporation
    Inventor: Seiya Umeno