US4864686A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tamper resistant track assembly
Assignee: Schlage Lock Co LLC
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Filing: 1988-12-12
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Granted: 1989-09-12
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Expires: 2008-12-12
Abstract
Abstract Disclosed is a tamper resistant assembly of a roller or slider in a track that can be used advantageously in schools, public buildings, detention facilities and the like; wherever the potential for vandalism and mischief is likely. In the present device the track is provided with unique sloped ends which expel, up and out, any foreign material placed in the track as it is moved along by the roller or slider toward the end of the track where it would ordinarily jam.
Inventors
- 👤 Thomas R. Lasier
- 👤 Thomas G. Ford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:37
CPC Classifications
E; E05; E05D; E05D15/00; E05D15/06; E05D15/0621; E05F; E05F1/00; E05F1/08; E05F1/10; E05F1/1041; E05F15/00; E05F15/60; E05F15/603; E05F15/611; E05F15/63; E05F3/00; E05F3/22; E05F2003/228
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
20 words
A tamper resistant track assembly having an internal slot and having ramp means to expel foreign objects from said slot.
Claim 2
Dependent Claim
20 words
A tamper resistant track assembly having an internal slot and having ramp means to expel foreign objects from said slot.
Claim 3
Dependent Claim
25 words
A tamper resistant track assembly according to claim 1 wherein said means for expelling foreign objects comprises a sloped ramp means in said internal slot.
Claim 4
Dependent Claim
44 words
A tamper resistant track assembly according to claim 2 wherein said sloped ramp means comprises an insert in said track, said ramp means having means for cooperating with said slot configuration of said track and means for securing said insert in said track means.
Claim 5
Dependent Claim
55 words
A tamper resistant track assembly according to claim 3 wherein said means for expelling foreign objects comprises an end plug having a flat bottom portion for cooperating with a track bottom, partial cylindrical side walls for cooperating with a side wall of said track means and a slope ramp means diagonally traversing said plug means.
Claim 6
Dependent Claim
23 words
A tamper resistant track assembly according to claim 4 wherein said plug means is secured in said track means by a fastener means.
Claim 7
Dependent Claim
31 words
A tamper resistant track assembly according to claim 1 wherein said ramp means comprises a bent up portion of said track means providing a ramped up end of said track means.
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) | 1992-09-11 | 1993-03-13 | 1993-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-09-11 | 1997-03-13 | 1997-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-09-11 | 2001-03-13 | 2001-09-12 | $7700.00 | Window Closed / Lapsed |