US3594876A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fastener having improved load-carrying capacity
Assignee: Dzus Fastener Co Inc
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Filing: 1969-10-15
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Granted: 1971-07-27
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Expires: 1989-10-15
Abstract
Abstract A fastener for substantially rigidly interengaging two members. A stud element is provided which is adapted to extend through an opening in one of the members to be fastened and has a cam slot adapted to engage a pin on the other of the members. The stud element is rotatable between an open and a closed position on the pin. A housing surrounds the upper part of the stud element in rotatable relationship therewith and is adapted to engage the surface of one of the members. The housing has surfaces thereon forming a slot in the wall thereof which is inclined with respect to the transverse axis of the housing. A bar extends laterally from the stud element through the slot and engages the slot forming surfaces of the housing. Means are provided for retaining the bar in the slot so that when the pin is in the closed position and the housing or stud are rotated relative to one another, the bar will shift in the slot from the relaxed position to a locked position and will be supported by a portion of the slot forming surfaces while in the locked position to thereby increase the load-carrying capacity of the fastener.
Inventors
- 👤 Conrad J Gunther
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:43
CPC Classifications
F; F16; F16B; F16B21/00; F16B21/02; F16B21/04
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
211 words
A fastener for substantially rigidly interengaging two members comprising: a stud element adapted to extend through an opening in one of said members and having a cam slot adapted to engage a pin on the other of said members; said stud element being rotatable between an open and closed position on the pin; a housing surrounding the upper part of the stud element in rotatable relationship therewith and being positioned on one side of the surface of said one member distal from said other member when said cam slot is engaged with the pin; said housing having surfaces thereon forming a slot in the wall thereof inclined with respect to the transverse axis of the housing; a bar extending laterally from the stud element through the slot and engaging the slot forming surfaces of said housing; and means for retaining the bar in the slot so that when the pin is in the closed position in the cam slot and the housing or stud are rotated relative to one another, the bar will shift in the slot from a relaxed position to a locked position and will be supported by a portion of said slot forming surfaces while in the locked position to thereby increase the load-carrying capacity of the fastener.
Claim 2
Dependent Claim
211 words
A fastener for substantially rigidly interengaging two members comprising: a stud element adapted to extend through an opening in one of said members and having a cam slot adapted to engage a pin on the other of said members; said stud element being rotatable between an open and closed position on the pin; a housing surrounding the upper part of the stud element in rotatable relationship therewith and being positioned on one side of the surface of said one member distal from said other member when said cam slot is engaged with the pin; said housing having surfaces thereon forming a slot in the wall thereof inclined with respect to the transverse axis of the housing; a bar extending laterally from the stud element through the slot and engaging the slot forming surfaces of said housing; and means for retaining the bar in the slot so that when the pin is in the closed position in the cam slot and the housing or stud are rotated relative to one another, the bar will shift in the slot from a relaxed position to a locked position and will be supported by a portion of said slot forming surfaces while in the locked position to thereby increase the load-carrying capacity of the fastener.
Claim 3
Dependent Claim
66 words
The invention in accordance with claim 1 wherein the inner, upper surface of said housing is spaced from the upper end of said stud to thereby form a chamber therebetween, a spring in said chamber and being compressed a predetermined amount so as to bear against the upper surface of said stud and facilitate the retention of said bar in the relaxed position in said slot.
Claim 4
Dependent Claim
16 words
The invention in accordance with claim 1 wherein a cup surrounds the housing and stud assembly.
Claim 5
Dependent Claim
94 words
The invention in accordance with claim 1 wherein the portion of said housing beneath the slot and forming the lower surface of said slot substantially conforms to the configuration and attitude of said slot and is disengaged at the upper end thereof from the remainder of said housing to form a cantilever element, said cantilever element spaced from the members to be fastened and responsive to rotation between the stud and the housing to facilitate movement of the bar between the relaxed and locked positions while retaining the increased load-carrying capacity of the fastener.
Claim 6
Dependent Claim
39 words
The invention in accordance with claim 1 wherein the means for retaining the bar in position includes notches formed in the housing wall and located at the upper and lower ends of the inclined slot to seat the bar.
Claim 7
Dependent Claim
24 words
The invention in accordance with claim 1 wherein means are included for retaining the bar in position at intermediate positions along the inclined slot.
Claim 8
Dependent Claim
48 words
The invention in accordance with claim 6 wherein the means for retaining the bar includes a plurality of serrations extending from a lower end of the inclined slot to the upper end thereof to permit the seating of the bar in intermediate retention positions in the inclined slot.
Claim 9
Dependent Claim
63 words
The invention in accordance with claim 7 wherein a washer is provided between the bottom surface of tHe housing and said one member, said washer being resilient and arcuate in normal configuration and being responsive to rotation between the stud and housing to facilitate movement of the bar between the relaxed and locked positions while retaining the increased load-carrying capacity of the fastener.
Claim 10
Dependent Claim
24 words
The invention in accordance with claim 1 wherein a locking mount is positioned on the housing for seating the bar in the relaxed position.
Claim 11
Dependent Claim
23 words
The invention in accordance with claim 2 wherein a hub extends from the stud element about which the spring and housing are positioned.
Claim 12
Dependent Claim
45 words
The invention in accordance with claim 1 wherein said housing includes a pair of diametrically opposed slots with each slot having a bar positioned therein, said bars being simultaneously transferred between the relaxed and locked positions upon relative rotation between said stud and said housing.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |