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US3815520A Expired / Lapsed US ⏱️ 0.0 years remaining

Shooting range ceiling protection device

Assignee: Detroit Bullet Trap Corp
•
Filing: 1971-12-21
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Granted: 1974-06-11
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Expires: 1991-12-21
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Abstract

Abstract A ceiling protection device for a shooting range which includes a plurality of rectangular ceiling modules locked together at the sides and being suspended at the top and bottom edges. Each one of the modules has two positions for being hooked by a suspension chain. Normally only one chain is coupled to one of the hooks, leaving the other hook unused. When it is desired to remove and replace one of the modules due to excessive damage, the chain is merely unhooked from its normal position and connected to an adjacent hook means of another module. Once this is accomplished the module which is being replaced is free to be readily disconnected from the remaining ceiling structure. When the module is replaced, the chain is merely restored to its original position in the new module.

Inventors

  • 👤 J Nikoden

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-06 05:16
CPC Classifications
E; E04; E04B; E04B9/00; E04B9/04; E04B9/0428; E04B9/22

Claims Analysis

Total Claims: 3
Claim 1
Independent Claim 153 words
In a shooting range, the combination of: a plurality of rectangular ceiling modules locked together at the sides and being free at the top and bottom edges, said modules being angled rearwardly and downwardly, two hook means in each module along the top edge, said hook means being spaced apart toward the sides of the module so that a hook means of one module is positioned near a hook means of an adjacent module, a plurality of suspension means, each of said suspension means being normally coupled to alternate ones of said hook means along the length of said top edge, means for suspending the rear edge of the modules, and the remaining hook means being normally unused, whereby any one of said suspension means may be readily transferred to an adjacent hook means of another module to permit the ready replacement of the module from which the suspension means has been transferred.
Claim 2
Dependent Claim 153 words
In a shooting range, the combination of: a plurality of rectangular ceiling modules locked together at the sides and being free at the top and bottom edges, said modules being angled rearwardly and downwardly, two hook means in each module along the top edge, said hook means being spaced apart toward the sides of the module so that a hook means of one module is positioned near a hook means of an adjacent module, a plurality of suspension means, each of said suspension means being normally coupled to alternate ones of said hook means along the length of said top edge, means for suspending the rear edge of the modules, and the remaining hook means being normally unused, whereby any one of said suspension means may be readily transferred to an adjacent hook means of another module to permit the ready replacement of the module from which the suspension means has been transferred.
Claim 3
Dependent Claim 53 words
The combination in accordance with claim 1 wherein two hook means are provided in each module along the bottom edge thereof, said hook means being disposed similarly to the hook means at the top edge and suspension means being arranged for the bottom edge in the same manner as for the top edge.

References Cited (Backward Citations)

US1866539A Cited
US2449203A Cited
US2854565A Cited
US2935152A Cited
US3019561A Cited
US3072183A Cited
US3122216A Cited
US3426489A Cited

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-06-10 1977-12-10 1978-06-11 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-06-10 1981-12-10 1982-06-11 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-06-10 1985-12-10 1986-06-11 $7700.00 Window Closed / Lapsed

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