US3747898A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Guard rail post
Assignee: Individual
•
Filing: 1972-04-19
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Granted: 1973-07-24
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Expires: 1992-04-19
Abstract
Abstract A perimeter guard rail post apparatus for rapid installation of a temporary safety barrier post to a concrete slab and having means for attaching wooden rails directly to the post. The quick attaching post has a clamping system utilizing one fixed jaw and one movable jaw, with the movable jaw being movably pinned to a lever at one end thereof and fulcrummed on the post. A threaded member is threaded to the other end of the lever and drives against the post to tighten the clamp.
Inventors
- 👤 W Warren
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:26
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/32; E04G21/3204; E04G21/3223; E04G21/3233; E04G21/3242
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
277 words
A guard rail post for attaching to a concrete slab, or the like, for erecting a perimeter guard rail system comprising in combination: an elongated post member, a pair of jaws attached to said elongated post member for engaging a surface between said jaws to hold said elongated post member in an upright position to said surface, one of said pair of jaws being fixedly attached to said elongated post member and the other said jaw being located below said first mentioned jaw and movably attached to said post member for movement into engagement with said surface for locking said surface between said jaws; a lever member which is fulcrummed on said elongated post member with said movable jaw being pivotally attached to said lever member, said lever extending to the opposite side of said post member from said movable jaw and having a threaded member threaded therethrough for driving against said post for moving said movable jaw towards said fixed jaw, whereby the surface may be clamped therebetween, said threaded member having a handle formed therein for screwing said threaded member against said post member, and said movable jaw being movably attached to saId lever with a pin, to allow said jaw to engage a surface at different angles of said lever for a uniform clamping pressure; said lever having a protruding portion extending generally perpendicular to said lever so that said threaded member will be threaded therethrough directly against said elongated post; and said post having a plurality of openings therein for receiving a pin member for movably attaching said lever to said post at any one of a plurality of positions along said post.
Claim 2
Dependent Claim
277 words
A guard rail post for attaching to a concrete slab, or the like, for erecting a perimeter guard rail system comprising in combination: an elongated post member, a pair of jaws attached to said elongated post member for engaging a surface between said jaws to hold said elongated post member in an upright position to said surface, one of said pair of jaws being fixedly attached to said elongated post member and the other said jaw being located below said first mentioned jaw and movably attached to said post member for movement into engagement with said surface for locking said surface between said jaws; a lever member which is fulcrummed on said elongated post member with said movable jaw being pivotally attached to said lever member, said lever extending to the opposite side of said post member from said movable jaw and having a threaded member threaded therethrough for driving against said post for moving said movable jaw towards said fixed jaw, whereby the surface may be clamped therebetween, said threaded member having a handle formed therein for screwing said threaded member against said post member, and said movable jaw being movably attached to saId lever with a pin, to allow said jaw to engage a surface at different angles of said lever for a uniform clamping pressure; said lever having a protruding portion extending generally perpendicular to said lever so that said threaded member will be threaded therethrough directly against said elongated post; and said post having a plurality of openings therein for receiving a pin member for movably attaching said lever to said post at any one of a plurality of positions along said post.
Claim 3
Dependent Claim
37 words
The apparatus in accordance with claim 1 in which said post has a plurality of brackets thereon adapted to receive a wooden guard rail, each bracket having holes therein for driving nails therethrough into said wooden rails.
Claim 4
Dependent Claim
23 words
The apparatus in accordance with claim 2 in which said fixed jaw includes a bracket formed therewith for attaching toe boards between posts.
Claim 5
Dependent Claim
36 words
The apparatus in accordance with claim 1 in which said movable jaw is attached to said lever with a pin passing through a portion of said lever and also through a portion of said movable jaw.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |