Expansion bolt having internal spherical member and rear...

Details Expansion bolt having internal spherical member and rear... Expansion bolt having internal spherical member and rear...

2005-04-05

2005-04-05

Saether, Flemming (Department: 3677)

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Having separate expander means

Including sleeve and distinct tapered expander

C411S044000, C411S055000

Reexamination Certificate

active

06874984

ABSTRACT:
An expansion bolt includes a sleeve in which a central bore is defined, comprising a rear inner-threaded section and a front tapering section. Radial slits are defined in a front end portion of the sleeve and partially in communication with the tapering bore to form a plurality of deformable pawls. At least one spherical member is received in the tapering bore and has a diameter greater than a smallest diameter of the tapering bore whereby the spherical member is effectively retained in the tapering bore. A driving member having external threading is threadingly received in the threaded bore for axially engaging the spherical member. By screwing the driving member, the spherical member is forced toward the front end of the sleeve and due to the tapering configuration of the tapering bore, the movement of the spherical member toward the front end of the sleeve forces the pawls to deform outward in a radial direction thereby securing the expansion bolt in a hole defined in for example a wall.

REFERENCES:
patent: 519172 (1894-05-01), Calkins
patent: 3266364 (1966-08-01), Becker
patent: 3479072 (1969-11-01), Kosar
patent: 3618135 (1971-11-01), Weller
patent: 4607992 (1986-08-01), Mauritz et al.
patent: 5017067 (1991-05-01), Ohlin
patent: 5527023 (1996-06-01), Starr
patent: 345247 (1998-11-01), None
patent: 390394 (2000-05-01), None

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