Telescopic nut
OwnerJoseph E. Haringinventor
Life of this patent
Estimating the term…
Abstract
A nut assembly is disclosed that will ensure that the shank of a bolt that features a measurable grip length will pass through the contact plane of adjoining members. The nut assembly also allows the desired compressive force in the adjoining members to be attained by using a telescopic feature of the nut to allocate additional thread action for the bolt, enabling the bolt to be drawn into the nut further than what would be allowed by a standard nut. The adaptability of the nut assembly can eliminate the need for washers or shims to adjust the shank penetration of the bolt. The nut assembly is useful for application in which the specified thread length and the grip length of the bolt is incompatable with the abutment thickness of the adjoining members.
Claims13
A nut assembly for joining two or more workpieces together comprising:
- a first fastener member having a first generally cylindrical inner bore provided with a first set of threads therein,
- a second fastener member provided with a second set of threads on an exterior surface thereof for threadable engagement with said first set of threads, said second fastener member having a second generally cylindrical inner bore provided with a third set of threads therein,
- said first set of threads, said second set of threads and said third set of threads all being cut in the same direction and being of approximately the same pitch,
- a threaded member having a shank including an unthreaded portion longer than coaxial bores in said workpieces through which said threaded member extends, said threaded member further having a conventional thread shank interface,
- whereby as said threaded member is threadably advanced into said third set of threads of said second fastener member, said third set of threads of said second fastener member contact said conventional thread/shank interface of said threaded member, with further relative advancement rotation between said first fastener member and second fastener member causing said first fastener member to be advanced past said conventional thread/shank interface of said threaded member and contact a said workpiece adjacent said nut assembly.
A fastener for use in conjunction with a conventional threaded member having a first set of threads and a shank including an unthreaded portion longer than openings in a workpiece through which said shank extends, said conventional threaded member further provided with a conventional thread/shank interface and comprising:
- a fastener member having a first bore with a second set of threads therein,
- a generally cylindrical member having a second bore, with a third set of threads disposed in said second bore for threadably engaging said first set of threads of said conventional threaded member, and a fourth set of threads on an outer surface of said cylindrical member for threadably engaging said second set of threads of said fastener member, said first set of threads, said second set of threads, said third set of threads and said fourth set of threads being all cut in the same direction and of approximately the same pitch so that when said threads of said conventional threaded member are threadably advanced into said second bore, said unthreaded portion of said shank engages an end of said third set of threads of said cylindrical member and blocks further advancement of said cylindrical member, with further rotation of said conventional threaded member advancing said fastener member past said shank to be tightened against said workpiece.
Dependencies are inferred from the claim text.