US 2019/0376548 A1Published application

External thread member

AssigneeTopura Co., Ltd.

InventorsKuninori MATSUMOTO, Mayumi MATSUNO

Life of this patent

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Abstract

An external thread member capable of performing a fastening operation efficiently without increasing the number of parts by assembling a collar into the external thread member. The external thread member 1 includes a shaft portion 5 inserted into a mounting hole 105 of a mounting member 101 through a collar 7, and the mounting member 101 is fastened to a fastening member 102. The shaft portion 5 includes a threaded portion 51 and a neck portion 52. The collar 7 is mounted on the neck portion 52 so as to be rotatable relative to each other and is engaged with the threaded portion 51 whereby retention is achieved. A counterbore hole 106 is formed in an opening close to the mounting hole 105 of an internal thread hole 104 with a tubular portion 71 inserted into the mounting hole 105 of the collar 7.

Claims20

Dependent claims

An external thread member including a shaft portion having a threaded portion and a head portion, in which the shaft portion is inserted into a mounting hole of a mounting member through a collar and the mounting member is fastened to a fastening member, wherein

the collar is integrally assembled into the shaft portion,
the collar includes a tubular portion and a flange portion formed at one end of the tubular portion, and the flange portion is in direct contact with an opening edge of a mounting hole of the mounting member, and
when an internal thread hole corresponding to the mounting hole is formed in the fastening member to which the mounting member is attached, and a counterbore hole is formed at an opening close to the mounting hole of the internal thread hole, an axial length of the tubular portion inserted into the mounting hole of the collar is larger than a sum of an axial length of the mounting hole and a depth of the counterbore hole by an amount corresponding to a difference between an amount of elongation of the collar and an amount of elongation due to thermal expansion of the mounting member and the fastening member at a highest temperature of an expected service environment.

Dependencies are inferred from the claim text.

Facts

Application: 16/470,972Filed 20 Nov 2017
Priority: JP 2016-24517119 Dec 2016
Published: 12 Dec 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

F16B 19/02
Bolts without screw-thread; Pins, including deformable elements ; Rivets: bolts or sleeves for positioning of machine parts, e.g. notched taper…
F16B 39/26
By means of washers, spring washers, or resilient plates that lock against the object: with spring washers fastened to the nut or bolt-head
F16B 5/0241
By means of fastening members using screw-thread: with the possibility for the connection to absorb deformation, e.g. thermal or vibrational
F16B 5/0258
By means of fastening members using screw-thread: using resiliently deformable sleeves, grommets or inserts

Family

US 11,162,525 B2Related patent
US 2019/0376548 A1This patent

From the US filing history. Foreign family members aren’t listed.

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Citations

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