Threaded fastener
AssigneeInfastech Intellectual Properties Pte. Ltd.
InventorsCheng Siong Phua, Senthilukumaran Kothandaraman
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Abstract
A threaded fastener having a threaded portion with a ratio of pitch diameter to minor diameter less than 1.28, and the threaded portion with a major diameter portion, a leading flank having a normal angle between 10° and 60°, a trailing flank having a normal angle between 1° and 30°, and a shank portion extending between the trailing flank and the leading flank of adjacent threads of a arcuate surface having a radius greater than the thread height. The arcuate surface forming the shank portion may have a radius between 1.2 and 1.8 times the thread height.
Claims37
A threaded fastener comprising:
- a fastener having a threaded portion with a ratio of pitch diameter to minor diameter less than 1.28, and
- the threaded portion with a major diameter portion, a leading flank having a normal angle between 10° and 60°, a trailing flank having a normal angle between 1° and 30°, and a shank portion extending between the trailing flank and the leading flank of adjacent threads of a continuous radius greater than the thread height.
A threaded fastener comprising
- a fastener having a threaded portion with a major diameter portion, a leading flank having a normal angle between 10° and 60°, a trailing flank having a normal angle between 1° and 30°, and a shank portion extending between the trailing flank and the leading flank of adjacent threads, and
- at least one minor protrusion formed along at least a portion of the shank portion of the threaded portions positioned between the trailing flank and the lead flank of adjacent threads.
Dependencies are inferred from the claim text.