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US 11,365,758 B2Granted
Bolt
AssigneeMeidoh Co., Ltd.
InventorsKoji Makino, Masataka Kondo, Shungo Maki, Akihiro Futamura
Life of this patent
Estimating the term…
Abstract
The objective is to provide a bolt which can more effectively suppress occurrence of seizure due to both oblique insertion and biting of foreign substances. The bolt includes a tapered surface, a guide portion, and a threaded portion in order from a distal end side and further includes a plurality of recesses provided on the tapered surface and a plurality of cutout portions provided at a distal end portion of the threaded portion.
Claims11
A bolt, comprising:
- a tapered surface surrounding the bolt;
- a guide portion abutting the tapered surface;
- a threaded portion in order from a distal end side;
- a plurality of recesses provided on a distal most part of the tapered surface;
- and
- a plurality of cutout portions provided at a distal end portion of the threaded portion, wherein
- the guide portion is placed between the plurality of recesses and the plurality of cutout portions,
- the plurality of recesses and the plurality of cutout portions are separated from each other and from the guide portion, and
- a starting end portion of the guide portion is shifted from an extension of a helix passing through a crest of a ridge of the threaded portion toward a base end such that the bolt can spin freely in an internal thread when a tilt angle of an axis of the bolt with respect to an axis of the internal thread is larger than an attitude correction limit.
6 more elements
A bolt, comprising:
- a tapered surface;
- a guide portion;
- a threaded portion in order from a distal end side;
- a plurality of recesses provided on a distal most part of the tapered surface;
- and
- a plurality of cutout portions provided at a distal end portion of the threaded portion, wherein
- the guide portion exists on extension of a same helix as a thread root of the threaded portion and is formed between a groove portion formed at the distal end portion of the threaded portion and a surface end position on a base end side of the tapered surface,
- the guide portion is placed between the plurality of recesses and the plurality of cutout portions,
- the plurality of recesses and the plurality of cutout portions are separated from each other and from the guide portion, and
- a depth of the groove portion in a radial direction is deeper than the thread root of the threaded portion,
- the guide portion has a shape extending in a direction around an axis of the bolt from a starting end portion to a terminal end portion and expanding in an axial direction of the bolt in transition from the starting end portion to the terminal end portion, the starting end portion being an intersection between the surface end position on the base end side of the tapered surface and a helix according to the groove portion, and
- the starting end portion of the guide portion is shifted from an extension of a helix passing through a crest of a ridge toward a base end such that the bolt can spin freely in an internal thread when a tilt angle of an axis of the bolt with respect to an axis of the internal thread is larger than an attitude correction limit.
9 more elements
Dependencies are inferred from the claim text.