US4669577A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Slab clamp guard rail post
Assignee: SAF-T-GREEN MANUFACTURING Corp A CORP OF GEORGIA
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Filing: 1986-07-21
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Granted: 1987-06-02
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Expires: 2006-07-21
Abstract
Abstract A clamping-type guard rail support having a post which is clamped in position by raising an opposing clamping arm attached to a threaded rod which is braced to prevent rotation of the rod and arm.
Inventors
- 👤 Richard H. Werner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 09:43
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/32; E04G21/3204; E04G21/3223; E04G21/3233; E04G21/3242
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
115 words
A slab clamp guard rail support, comprising: (a) a stanchion comprising a post having a clamping surface at its lower end, and a tube rigidly connected to the post, (b) at least one guard rail support mounted on the post for receiving a guard rail, (c) a rod extending through the tube, (d) a brace rigidly connected to the rod to slidably engage the post and prevent the rod from rotating while permitting it to slide within the tube, (e) an arm extending from the rod to provide a lower clamping surface opposing the post clamping surface; and (f) means for advancing the rod through the tube, thereby urging the clamping surfaces toward each other.
Claim 2
Dependent Claim
115 words
A slab clamp guard rail support, comprising: (a) a stanchion comprising a post having a clamping surface at its lower end, and a tube rigidly connected to the post, (b) at least one guard rail support mounted on the post for receiving a guard rail, (c) a rod extending through the tube, (d) a brace rigidly connected to the rod to slidably engage the post and prevent the rod from rotating while permitting it to slide within the tube, (e) an arm extending from the rod to provide a lower clamping surface opposing the post clamping surface; and (f) means for advancing the rod through the tube, thereby urging the clamping surfaces toward each other.
Claim 3
Dependent Claim
38 words
A support according to claim 1 wherein the post clamping surface is formed by a section of angle iron on which the post rests, the vertical flange of which includes means to permit attachment of a toe board.
Claim 4
Dependent Claim
16 words
A support according to claim 1 wherein the rail support is a section of square tube.
Claim 5
Dependent Claim
35 words
A support according to claim 1 wherein the rod is threaded, and the means for advancing the rod is a nut mounted on the rod between the tube and the means for preventing rod rotation.
Claim 6
Dependent Claim
14 words
A support according to claim 4 wherein the rod thread is a coiled thread.
Claim 7
Dependent Claim
117 words
A slab clamp guard rail support, comprising: (a) a stanchion comprising a post having a clamping surface at its lower end, and a tube rigidly connected to the post, (b) at least one rail support mounted on the post for receiving a guard rail, (c) a rod extending through the tube, (d) a brace extending from the upper end of the rod to slidably engage the post and prevent the rod from rotating while permitting it to slide within the tube, (e) an arm extending from the rod to provide a lower clamping surface opposing the post clamping surface; and (f) means for advancing the rod through the tube, thereby urging the clamping surface toward each other.
Claim 8
Dependent Claim
117 words
A slab clamp guard rail support, comprising: (a) a stanchion comprising a post having a clamping surface at its lower end, and a tube rigidly connected to the post, (b) at least one rail support mounted on the post for receiving a guard rail, (c) a rod extending through the tube, (d) a brace extending from the upper end of the rod to slidably engage the post and prevent the rod from rotating while permitting it to slide within the tube, (e) an arm extending from the rod to provide a lower clamping surface opposing the post clamping surface; and (f) means for advancing the rod through the tube, thereby urging the clamping surface toward each other.
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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) | 1990-06-01 | 1990-12-01 | 1991-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1994-06-01 | 1994-12-01 | 1995-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1998-06-01 | 1998-12-01 | 1999-06-02 | $7700.00 | Window Closed / Lapsed |