초록 ▼

A screw-type fastener comprising two cooperable assemblages for releasably securing a panel having one of said assemblages to an underlying support structure such as a sub-panel or other framework having the other assemblage. The said other assemblage of the fastener comprises a tubular housing encl

A screw-type fastener comprising two cooperable assemblages for releasably securing a panel having one of said assemblages to an underlying support structure such as a sub-panel or other framework having the other assemblage. The said other assemblage of the fastener comprises a tubular housing enclosing a screw member which projects forwardly to an open end of the housing, toward the opening thereof. The said one fastener assemblage comprises a floating stud body carried by the panel and having an internally threaded bore which is adapted to receive the screw member when the stud body is applied thereto. The housing has ratchet disks encircling the screw member, provided with opposed faces containing radial teeth which engage one another. One disk is keyed to rotate with the stud body, and the other is keyed for longitudinal non-rotary movement in the housing. A spring in the housing maintains the disks in contact. The screw member is mounted for floating, turning movement in the housing, and is yieldably restrained by a detent as the stud body advances on the screw until a predetermined torque is reached. Thereafter the detent yields in the manner of a ratchet or overload clutch to enable the screw member to turn with the stud body as the fastener is pulled up, thereby preventing overtightening. The limiting of the torque eliminates personnel-related error or misjudgements.

대표청구항 ▼

A fastener for releasably securing a panel to an underlying supporting structure having an access opening, comprising in combination: (a) a tubular housing having a longitudinal bore, (b) means for securing said housing to the supporting structure, with the bore of the housing located at the access

A fastener for releasably securing a panel to an underlying supporting structure having an access opening, comprising in combination: (a) a tubular housing having a longitudinal bore, (b) means for securing said housing to the supporting structure, with the bore of the housing located at the access opening thereof, (c) an elongate screw member carried in the housing bore, having a threaded portion extending toward an open end thereof and accessible from said access opening, (d) said panel having an opening adapted to be located at the access opening in the supporting structure, (e) a stud having a bore with internal threads adapted to mate with the threaded portion of the screw member when the panel is placed over the supporting structure with its opening adjacent said access opening and the stud engaged with and turned with respect to the screw member, (f) detent means in said housing, adapted for engagement by the stud to prevent inadvertent rotation thereof with respect to the housing and consequent loosening thereof on the screw member under conditions of vibration, (g) means providing a movable mounting for the screw member in the housing to enable both turning and axial movement to occur, and (h) a yieldable detent carried by the housing and engaging the screw member so as to normally restrain unrestricted turning movement thereof except under conditions of excessive torque, thereby reducing the likelihood of damage occurring to the screw member or stud from possible overtightening.