US5499691A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ladder emergency braking system
Assignee: Individual
•
Filing: 1994-11-25
•
Granted: 1996-03-19
•
Expires: 2014-11-25
Abstract
Abstract A slip-on self-locking automatically articulating emergency brakeing system for ladders is described. Consisting of a metal plate as the complete raw material required for the manufacture of a set of two brakes, one brake designed to fit the left hand side rail, and one brake designed to fit the right hand side rail of said ladder. A plurality of protrusions diverge from the body (22) of each brake, including a jug handle type lug (20) which most nearly encircles a rung of said ladder, a slide plate (12) which engages the rear portion of said ladder rail. A slide plate clasp (14) to prevent lateral movement of the device, and structuraly induced incisor column (10) and incisor (8) for use as a perpendicular brakeing mechanism due to right angle reduction.
Inventors
- 👤 Peter J. Fitzpatrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:51
CPC Classifications
E; E06; E06C; E06C7/00; E06C7/42; E06C7/46
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
71 words
A ladder braking device comprising: braking means for pressing against or piercing a surface on which a base of a ladder rests; rung engagement means for securing said braking means onto a rung of said ladder while allowing said braking means to rotate about said rung; and locking means for fixing the rotation of said braking means against rotation by pushing against the rail when said braking means contacts said surface.
Claim 2
Dependent Claim
71 words
A ladder braking device comprising: braking means for pressing against or piercing a surface on which a base of a ladder rests; rung engagement means for securing said braking means onto a rung of said ladder while allowing said braking means to rotate about said rung; and locking means for fixing the rotation of said braking means against rotation by pushing against the rail when said braking means contacts said surface.
Claim 3
Dependent Claim
27 words
A braking device as claimed in claim 1, in which said rung engagement means comprises a lug adapted to fit snugly over the top of said rung.
Claim 4
Dependent Claim
38 words
A braking device as claimed in claim 2, in which said lug comprises seating means for holding said braking means apart from said rail and adjacent said surface when said ladder is positioned upwardly leaning against a structure.
Claim 5
Dependent Claim
27 words
A ladder braking device as claimed in claim 1, in which said locking means comprises securing means capable of holding said engaging means adjacent to the rail.
Claim 6
Dependent Claim
24 words
A ladder braking device as claimed in claim 4, in which said securing means is a clasp adapted to fit outwardly around said rail.
Claim 7
Dependent Claim
19 words
A braking device as claimed in claim 1, in which said braking means is tapered to form a point.
Claim 8
Dependent Claim
20 words
A braking device as claimed in claim 1, in which said device is configured from a single sheet of material.
Claim 9
Dependent Claim
15 words
A braking device as claimed in claim 7, wherein said material is metal or kevlar.
Claim 10
Dependent Claim
163 words
A ladder braking system comprising: a plurality of ladder braking devices comprising; a first device comprising; braking means for pressing against or piercing a surface on which a base of a ladder rests; rung engagement means for securing said braking means onto a rung of a said ladder while allowing said braking means to rotate about said rung; and locking means for fixing the rotation of said braking means against rotation by pushing against the left rail of said ladder when said braking means contacts said surface; and a second device comprising; braking means for pressing against or piercing a surface on which a base of a ladder rests; rung engagement means for securing said braking means onto a rung of a said ladder while allowing said braking means to rotate about said rung; and locking means for fixing the rotation of said braking means against rotation by pushing against the right rail of said ladder when said braking means contacts said surface.
Claim 11
Dependent Claim
163 words
A ladder braking system comprising: a plurality of ladder braking devices comprising; a first device comprising; braking means for pressing against or piercing a surface on which a base of a ladder rests; rung engagement means for securing said braking means onto a rung of a said ladder while allowing said braking means to rotate about said rung; and locking means for fixing the rotation of said braking means against rotation by pushing against the left rail of said ladder when said braking means contacts said surface; and a second device comprising; braking means for pressing against or piercing a surface on which a base of a ladder rests; rung engagement means for securing said braking means onto a rung of a said ladder while allowing said braking means to rotate about said rung; and locking means for fixing the rotation of said braking means against rotation by pushing against the right rail of said ladder when said braking means contacts said surface.
Claim 12
Dependent Claim
24 words
A braking system as claimed in claim 9, in which said first and second devices are each formed from a single sheet of material.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-03-19 | 1999-09-18 | 2000-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-03-19 | 2003-09-18 | 2004-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-03-19 | 2007-09-18 | 2008-03-19 | $7700.00 | Window Closed / Lapsed |