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US7290971: Shippable in-assembly bolt

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Filing Information

Inventor(s) Peter L. Bakos ·
Assignee(s) Okabe Co., Ltd. ·
Attorney/Agent(s) Mayer Brown LLP ·
Primary Examiner Katherine Mitchell ·
Application Number US10794750
Filing date 03/05/2004
Issue date 11/06/2007
Prior Publication Data
Predicted expiration date 03/05/2024
U.S. Classifications 411/304  · 411/970  · 411/999  · 411/352  · 411/174  · 411/383  · 411/353  ·
International Classifications F16B1900  · F16B2118  · F16B3504  · F16B3934  ·
Kind CodeB2
19 Claims, 3 Drawings


Abstract

A shippable in-assembly bolt having a head portion, a threaded portion containing threads and a gripper portion, wherein the gripper portion preferably comprises a grooved structure and an o-ring. The o-ring is intended to sit between the inner wall of a clearance hole in an assembly/subassembly and the grooved structure of the gripper portion. When the o-ring is in position between the inner wall of the clearance hole and the grooved structure of the gripper portion, the o-ring is in both compression and tension and acts to retain the bolt in the assembly during shipping operations. The invention can be used with any type of mechanical fastener, such as bolts, screws, pins, rivets, etc.

Independent Claims | See all claims (19)

  1. 1. An in-assembly fastener for insertion into a clearance hole in a part with which said fastener is to be shipped, said fastener comprising: a head section located at a first end of said fastener; a first threaded section of preselected diameter formed on said first end of said fastener; a second threaded section of preselected diameter formed on a second end of said fastener; a gripper section, located between first and second threaded sections, said gripper section having a preselected outer diameter less than the diameter of said threaded sections and having a preselected axial length; wherein said gripper section further comprises an irregular surface, said irregular surface structure having a helical groove structure that contains crest portions that are shallower than crest portions of said threaded sections; and an o-ring frictionally mounted on said gripper section, said o-ring having an outer diameter sized for insertion into a clearance hole with a diameter smaller than the outer diameter, wherein said o-ring outer diameter of said o-ring is selected to cause physical distortion of said o-ring in an axial direction along the length of said gripper section when said fastener is moved axially with respect to the clearance hole.
  2. 9. An assembly comprising: at least one clearance hole used to connect said assembly to a mating assembly; a fastener partially located within said clearance hole, said fastener comprising: a head section located at a first end of said fastener; a first threaded section of preselected diameter formed on said first end of said fastener; a second threaded section of preselected diameter formed on a second end of said fastener; a gripper section located between first and second threaded sections, said gripper section having a preselected outer diameter less than the diameter of said threaded sections and having a preselected axial length; and an o-ring mounted on said gripper section, said o-ring having an outer diameter larger than the diameter of said clearance hole, wherein the Outer diameter of said o-ring is selected to cause physical distortion of said o-ring in an axial direction along the length of said gripper section when said fastener is moved axially with respect to said clearance hole; wherein said o-ring sits between said gripper section and an internal wall of said clearance hole and wherein said o-ring is in compression and tension.

References Cited

U.S. Patent Documents

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US3182702* LONG LOK CORP Nason et al. May 1965
US3221794* W F CURLEE MFG CO Acres Dec 1965
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* cited by examiner

Other Publications

FLOWSERVE™, “MSS for Piloted and Non-Piloted Models, Installation Instructions” revised Mar. 1992, downloadedfrom http://www.flowserve.com/seals/literature/fits130—mss.pdf, 12 pages.*
ND Stay-Put Temporary Retention Brochure, 2 pages, May 29, 2003.
* cited by examiner

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US7751197 Kabushiki Kaisha Toshiba Tsutomu Hoshino et al. Jul 2010
US8641341 --

Patent Family

Document NumberAssigneeInventorsIssue/Pub Date
US20050196251 Peter Bakos Sep 2005
US7290971 Okabe Co., Ltd. Peter L. Bakos Nov 2007