US3575404A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Protective shroud assembly for installation about stressed coil springs
Assignee: Individual
•
Filing: 1969-01-06
•
Granted: 1971-04-20
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Expires: 1989-01-06
Abstract
Abstract A protective assembly for coil springs to protect life and property should the springs fail while stressed. The protective shroud is installable about the spring while under stress without need for unloading the spring or using any except simple tools.
Inventors
- 👤 Herman Otto Wesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 20:11
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/02; F16F1/04; F16F1/12; F16F1/128; E; E05; E05D; E05D13/00; E05D13/10; E05D13/12; E05D13/1207; E05D13/1223; E05D13/1215; E05Y; E05Y2201/00; E05Y2201/10; E05Y2201/11; E05Y2900/00; E05Y2900/10; E05Y2900/106
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
109 words
In a counterbalanced overhead door assembly of the type utilizing tension coil spring to power a counterbalanced dooroperating linkage assembly, that improvement which comprises a protective assembly designed for assembly about said tension coil spring while in place under load without need for detaching or unloading the spring, said protective assembly including pairs of semicylindrical members of different diameters sized to embrace said spring loosely, means for holding each pair of said members securely together with their adjacent ends loosely telescoped together, pin means extending diametrically through the remote ends of said pair of members and through means connecting said springs to an adjacent part of said counterbalance assembly.
Claim 2
Dependent Claim
109 words
In a counterbalanced overhead door assembly of the type utilizing tension coil spring to power a counterbalanced dooroperating linkage assembly, that improvement which comprises a protective assembly designed for assembly about said tension coil spring while in place under load without need for detaching or unloading the spring, said protective assembly including pairs of semicylindrical members of different diameters sized to embrace said spring loosely, means for holding each pair of said members securely together with their adjacent ends loosely telescoped together, pin means extending diametrically through the remote ends of said pair of members and through means connecting said springs to an adjacent part of said counterbalance assembly.
Claim 3
Dependent Claim
63 words
The combination defined in claim 1 characterized in the provision of flexible high-strength tie means extending axially of said spring and of sufficient length as not to interfere with the extension and contraction of said spring during opening and closing of the door but effective to hold said pairs of cylindrical members and the parts of the spring captive should the spring fail.
Claim 4
Dependent Claim
88 words
That method of enshrouding the tension coil spring of previously installed overhead door counterbalance assemblies without need for disconnecting the installed stressed spring and irrespective of the stressed condition of the spring which method comprises: embracing the opposite end halves of an installed spring with pairs of semicylindrical members of sufficiently different diameters to telescope over one another while allowing the spring to expand and contract, securing said pairs of members together, and securing an end of each pair of members to the adjacent end of the spring.
Claim 5
Dependent Claim
88 words
That method of enshrouding the tension coil spring of previously installed overhead door counterbalance assemblies without need for disconnecting the installed stressed spring and irrespective of the stressed condition of the spring which method comprises: embracing the opposite end halves of an installed spring with pairs of semicylindrical members of sufficiently different diameters to telescope over one another while allowing the spring to expand and contract, securing said pairs of members together, and securing an end of each pair of members to the adjacent end of the spring.
Claim 6
Dependent Claim
38 words
That method defined in claim 3 characterized in the step of connecting one end of a high-strength flexible tie member to each pair of cylindrical members and the other end of said tie members to a high-strength anchorage.
Claim 7
Dependent Claim
72 words
That method defined in claim 3 characterized in the step of installing a pair of interlooped elongated loops axially of said spring, and connecting the remote ends of said pair of loops to an adjacent respective end of said spring thereby to tie the remote ends of said spring and of said pair of semicylindrical members together and prevent the escape of convolutions of said spring upon multiple failure of said spring.
References Cited (Backward Citations)
US1598480A
Cited
US2129338A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-04-19 | 1974-10-19 | 1975-04-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-04-19 | 1978-10-19 | 1979-04-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-04-19 | 1982-10-19 | 1983-04-20 | $7700.00 | Window Closed / Lapsed |