US3755860A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Loop lock
Assignee: Dzus Fastener Co Inc
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Filing: 1972-03-17
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Granted: 1973-09-04
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Expires: 1992-03-17
Abstract
Abstract A loop lock adapted to engage and retain two adjacent members in fixed position with respect to one another. A resilient body is provided having an arcuate closed end portion terminating in a pair of opposed legs. The legs are normally spaced apart to receive two adjacent members therebetween. An opening is in each leg with the openings being substantially aligned. A stud is provided with a flanged end portion and a body portion which is removably extendable through the openings in the legs until the undersurface of the flanged end bears against the first of the legs. At least one tab extends laterally from one of the second leg and the body of the stud and the other of the second leg and the body of the stud has a cam slot therein engageable with the tab. The stud is rotatable between a locked and unlocked position and when the stud is rotated into the locked position, the tab follows the cam slot and will cause the legs to be bent toward one another and engage and capture the two members therebetween. When the stud is rotated into the unlocked position, the tab will follow the cam slot in the opposite direction thereby releasing the resilient legs to permit them to automatically return to their normal position and disengage the two members.
Inventors
- 👤 P Schenk
- 👤 T Dzus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:59
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/0433; B; B65; B65D; B65D7/00; B65D7/12; B65D7/24; B65D7/30; B65D7/32; E; E05; E05C; E05C19/00; F16B21/00; F16B21/02; Y; Y10; Y10T; Y10T24/00; Y10T24/44; Y10T24/44641; Y10T24/44684; Y10T24/44692; Y10T24/44709; Y10T403/00; Y10T403/71; Y10T403/7182
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
301 words
A loop lock adapted to engage and retain two adjacent members in fixed position with respect to one another comprising: a resilient body having an arcuate closed end portion terminating in a pair of opposed legs; said legs being normally spaced apart to receive two adjacent members therebetween; there being an opening in each leg with said openings being substantially aligned; a stud having a flanged end portion and a body portion extending therefrom; the body portion of the stud adapted to withstand a predetermined shear load and being removably extendable through the openings in said legs until the undersurface of said flanged end bears against the first of said legs and the body portion is spaced from the closed end portion of the resilient body; one of the body portion of the stud and the second of said legs having at least one tab extending laterally therefrom and the other of said body portion and said second leg having a cam slot thereon for engagement with said tab when said stud is extended through the openings in said legs; and said stud being rotatable between locked and unlocked positions whereby when said stud is rotated into the locked position, said tab will follow said cam slot and will cause said legs to be bent toward one another and engage and capture said two members therebetween in less than one revolution of the stud and to bring the loop lock into position to resist a high load acting between the closed end of the resilient body and the stud, and when said stud is rotated into the unlocked position said tab will follow said cam slot in the opposite direction thereby releasing said resilient legs to permit them to automatically return to their normal position in disengagement with the two members.
Claim 2
Dependent Claim
301 words
A loop lock adapted to engage and retain two adjacent members in fixed position with respect to one another comprising: a resilient body having an arcuate closed end portion terminating in a pair of opposed legs; said legs being normally spaced apart to receive two adjacent members therebetween; there being an opening in each leg with said openings being substantially aligned; a stud having a flanged end portion and a body portion extending therefrom; the body portion of the stud adapted to withstand a predetermined shear load and being removably extendable through the openings in said legs until the undersurface of said flanged end bears against the first of said legs and the body portion is spaced from the closed end portion of the resilient body; one of the body portion of the stud and the second of said legs having at least one tab extending laterally therefrom and the other of said body portion and said second leg having a cam slot thereon for engagement with said tab when said stud is extended through the openings in said legs; and said stud being rotatable between locked and unlocked positions whereby when said stud is rotated into the locked position, said tab will follow said cam slot and will cause said legs to be bent toward one another and engage and capture said two members therebetween in less than one revolution of the stud and to bring the loop lock into position to resist a high load acting between the closed end of the resilient body and the stud, and when said stud is rotated into the unlocked position said tab will follow said cam slot in the opposite direction thereby releasing said resilient legs to permit them to automatically return to their normal position in disengagement with the two members.
Claim 3
Dependent Claim
270 words
A loop lock adapted to engage and retain two adjacent members in fixed position in respect to one another comprising; a resilient body having an arcuate closed end portion terminating in a pair of opposed legs; said legs being normally spaced apart to receive two adjacent members therebetween; there being an opening in each leg with said openings being substantially aligned; at least one tab extending inwardly from the circumferential surface of one of said openings; a stud having a flanged end portion and an opposing cam slotted end portion adapted to withstand a high shear load; the cam slotted end portion being removably extendable through the openings in said legs until the undersurface of said flanged end bears against the other of said legs and said tab engages with said cam slot with the cam slotted end portion being spaced from the closed end portion of the resilient body; said stud being rotatable between locked and unlocked positions whereby when said stud is rotated into the locked position, said tab will follow said cam slot and will cause said legs to be bent toward one another and engage and capture said two members therebetween in less than one revolution of the stud and to bring the loop lock into position to resist a high load acting between the arcuate closed end and the cam slotted end portion, and when said stud is rotated into the unlocked position said tab will follow said cam slot in the opposite direction thereby releasing said resilient legs to permit them to automatically return to their normal positioN in disengagement with the two members.
Claim 4
Dependent Claim
270 words
A loop lock adapted to engage and retain two adjacent members in fixed position in respect to one another comprising; a resilient body having an arcuate closed end portion terminating in a pair of opposed legs; said legs being normally spaced apart to receive two adjacent members therebetween; there being an opening in each leg with said openings being substantially aligned; at least one tab extending inwardly from the circumferential surface of one of said openings; a stud having a flanged end portion and an opposing cam slotted end portion adapted to withstand a high shear load; the cam slotted end portion being removably extendable through the openings in said legs until the undersurface of said flanged end bears against the other of said legs and said tab engages with said cam slot with the cam slotted end portion being spaced from the closed end portion of the resilient body; said stud being rotatable between locked and unlocked positions whereby when said stud is rotated into the locked position, said tab will follow said cam slot and will cause said legs to be bent toward one another and engage and capture said two members therebetween in less than one revolution of the stud and to bring the loop lock into position to resist a high load acting between the arcuate closed end and the cam slotted end portion, and when said stud is rotated into the unlocked position said tab will follow said cam slot in the opposite direction thereby releasing said resilient legs to permit them to automatically return to their normal positioN in disengagement with the two members.
Claim 5
Dependent Claim
20 words
The invention in accordance with claim 2 wherein the pair of opposed legs are substantially parallel in the normal position.
Claim 6
Dependent Claim
40 words
The invention in accordance with claim 2 wherein there are a pair of diametrically opposed tabs extending inwardly from the circumferential surface of one of said openings and a corresponding cam slot on said stud for each of said tabs.
Claim 7
Dependent Claim
52 words
The invention in accordance with claim 2 wherein the flanged end portion of said stud forms a head, there being a slot in the rear surface of said head to facilitate engagement with the stud and rotation thereof with respect to the resilient body to shift between the locked and unlocked positions.
Claim 8
Dependent Claim
91 words
The invention in accordance with claim 2 wherein the cam slot in said stud is open at one end to receive the tab and includes a shoulder formed adjacent the other end thereof so that a predetermined amount of force is needed to pass the tab over the shoulder by displacement of at least one of the resilient legs and after the tab has passed over the shoulder the resilient legs tend to return to their normal configuration and will assist in holding the tab in locked position behind the shoulder.
Claim 9
Dependent Claim
80 words
The invention in accordance with claim 6 wherein when the tab is in the locked position a predetermined amount of force is needed to pass the tab over the shoulder by displacement of at least one of the resilient legs by rotation of the stud in the unlocking direction whereby continued rotation in the unlocking direction will disengage the tab from the cam slot to permit the resilient legs to return to their normal position and disengage the two members.
Claim 10
Dependent Claim
37 words
The invention in accordance with claim 2 wherein the loop lock is positioned to hold the end poles of two adjacent pieces of mesh screen with the end poles forming the two adjacent members in locked position.
References Cited (Backward Citations)
GB190608720A
Cited
FR553157A
Cited
US2123068A
Cited
US2339591A
Cited
US2446070A
Cited
US2613419A
Cited
US3055071A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-03 | 1977-03-05 | 1977-09-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-03 | 1981-03-05 | 1981-09-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-03 | 1985-03-05 | 1985-09-04 | $7700.00 | Window Closed / Lapsed |