US3995833A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Removable guard rail stanchion apparatus
Assignee: Individual
•
Filing: 1975-07-23
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Granted: 1976-12-07
•
Expires: 1995-07-23
Abstract
Abstract Removable guard rail stanchion apparatus comprises a clamping portion adapted for clamping to surfaces of a floor edge and a vertical stanchion post having a lower end releasably locked in a socket fixed to the clamping portion. The clamping portions includes larger and smaller diameter vertical tubes, the smaller diameter tube being slidably connected inside the larger diameter tube by an elongate axial screw. Horizontally projecting clamping member is fixed to each of the two tubes. Turning of the axial screw telescopes the tubes and thereby adjusts the spacing between the clamping members which bear against horizontal floor edge surfaces. A dished washer, through which the clamping force is applied, flattens to give a visual indication when sufficient clamping force has been applied, an angle is provided on at least one of the clamping members to fit over a floor edge corner to prevent twisting of the clamping portion relative to the floor edge. In a variation, the two tubes comprising the clamping portion are horizontally disposed, and the clamping members depend therefrom to enable clamping of vertical edge surfaces. The stanchion part may be locked into the clamping portion socket by a removable pin, by a friction lock, or by a socket pin which fits into an inverted L-shaped edge cut out on the post.
Inventors
- 👤 Jack McLaughlin
- 👤 John R. McCoy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 15:26
CPC Classifications
E; E04; E04G; E04G21/00; E04G21/32; E04G21/3204; E04G21/3223; E04G21/3233; E04G21/3242
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
97 words
A removable guard rail stanchion apparatus which comprises: a. a stanchion having portions thereof adapted for mounting guard rail sections, b. clamping means adapted for clamping to edge portions of a mounting structure, said clamping means including socket means for receiving lower end portions of said stanchion and, c. locking means for releasably retaining said lower end portions in said socket means, whereby said lower end portions may be firmly locked in said socket means and may be unlocked and easily removed thereform and subsequently reinstalled therein without unclamping of said clamping means from a mounting structure.
Claim 2
Dependent Claim
97 words
A removable guard rail stanchion apparatus which comprises: a. a stanchion having portions thereof adapted for mounting guard rail sections, b. clamping means adapted for clamping to edge portions of a mounting structure, said clamping means including socket means for receiving lower end portions of said stanchion and, c. locking means for releasably retaining said lower end portions in said socket means, whereby said lower end portions may be firmly locked in said socket means and may be unlocked and easily removed thereform and subsequently reinstalled therein without unclamping of said clamping means from a mounting structure.
Claim 3
Dependent Claim
33 words
The invention as claimed in claim 1, wherein said clamping means includes spaced, first and second horizontally projecting clamp portions adapted for gripping generally horizontal upper and lower surfaces of a mounting structure.
Claim 4
Dependent Claim
27 words
The invention as claimed in claim 2, wherein said spacing between said first and second portions is adjustable in the general range of 4 to 20 inches.
Claim 5
Dependent Claim
32 words
The invention as claimed in claim 1, wherein said clamping means includes spaced first and second vertically projecting clamp portions adapted for gripping generally vertical side surfaces of a mounting structure element.
Claim 6
Dependent Claim
27 words
The invention as claimed in claim 4, wherein said spacing between said first and second portions is adjustable in the general range of 5 to 15 inches.
Claim 7
Dependent Claim
33 words
The invention as claimed in claim 1, wherein said locking means includes a removable pin, said lower end portion of said stanchion and said socket means having apertures therein for receiving said pin.
Claim 8
Dependent Claim
56 words
The invention as claimed in claim 1, wherein said locking means includes a handle having a threaded shaft, said socket means having a threaded aperture for receiving said shaft, whereby an end of said shaft may be caused to bear against said end portion of said stanchion received by said socket means for friction locking thereof.
Claim 9
Dependent Claim
144 words
A removable guard rail stanchion apparatus which comprises: a. a stanchion having portions thereof adapted for mounting guard rail sections, b. clamping means adapted for clamping to edge portions of a mounting structure, said clamping means including socket means for receiving lower end portions of said stanchion and, c. locking means for releasably retaining said lower end portions in said socket means, whereby said lower end portions may be firmly locked in said socket means and may be unlocked and easily removed therefrom without unclamping of said clamping means from a mounting structure, said locking means including a projection inwardly directed from said socket means, said lower end portion of said stanchion having an inverted "L" shaped cut out for receiving said projection, whereby said lower end portion may be lowered onto said projection and twisted to lock said stanchion in said socket means.
Claim 10
Dependent Claim
144 words
A removable guard rail stanchion apparatus which comprises: a. a stanchion having portions thereof adapted for mounting guard rail sections, b. clamping means adapted for clamping to edge portions of a mounting structure, said clamping means including socket means for receiving lower end portions of said stanchion and, c. locking means for releasably retaining said lower end portions in said socket means, whereby said lower end portions may be firmly locked in said socket means and may be unlocked and easily removed therefrom without unclamping of said clamping means from a mounting structure, said locking means including a projection inwardly directed from said socket means, said lower end portion of said stanchion having an inverted "L" shaped cut out for receiving said projection, whereby said lower end portion may be lowered onto said projection and twisted to lock said stanchion in said socket means.
Claim 11
Dependent Claim
27 words
The invention as claimed in claim 1, wherein said clamping means includes friction enhancing means for improving the gripping of said clamping means on a mounting structure.
Claim 12
Dependent Claim
25 words
The invention as claimed in claim 9, wherein said friction enchancing means includes a plurality of projections on structure gripping surfaces of said clamping means.
Claim 13
Dependent Claim
26 words
The invention as claimed in claim 1, including means for visually indicating when a predetermined clamping force is applied by said clamp to a mounting structure.
Claim 14
Dependent Claim
20 words
The invention as claimed in claim 11, wherein said indicating means includes a dished washer cooperating with said clamping means.
Claim 15
Dependent Claim
19 words
The invention as claimed in claim 1, wherein said clamping means includes screw jack means for causing clamping action.
Claim 16
Dependent Claim
30 words
The invention as claimed in claim 1, wherein said clamping means includes a pressure cylinder and piston and means for applying pressurized fluid to said cylinder for causing clamping action.
Claim 17
Dependent Claim
115 words
A temporary guard rail support, which comprises: a. a removable guard rail post said post including guard rail member attaching means, b. clamping means having adjustable spaced projecting portions adapted for clamping therebetween edge portions of a mounting structure, c. socket means connected to said clamping means for receiving a lower end of said post, d. locking means for releasably locking said lower post end in said socket means, to permit removal of said post from, and reinstallation of said post in said socket means without unclamping said clamping means from said mounting structure and, e. means for visually indicating when a predetermined clamping force is applied by said clamping means to a mounting structure.
Claim 18
Dependent Claim
115 words
A temporary guard rail support, which comprises: a. a removable guard rail post said post including guard rail member attaching means, b. clamping means having adjustable spaced projecting portions adapted for clamping therebetween edge portions of a mounting structure, c. socket means connected to said clamping means for receiving a lower end of said post, d. locking means for releasably locking said lower post end in said socket means, to permit removal of said post from, and reinstallation of said post in said socket means without unclamping said clamping means from said mounting structure and, e. means for visually indicating when a predetermined clamping force is applied by said clamping means to a mounting structure.
Claim 19
Dependent Claim
27 words
The invention as claimed in claim 15, wherein said projecting portions of said clamping means are generally horizontal, whereby horizontal surfaces of a mounting structure are clamped.
Claim 20
Dependent Claim
28 words
The invention as claimed in claim 15, wherein said projecting portions of said clamping means are generally vertically depending, whereby vertical surfaces of a mounting structure are clamped.
Claim 21
Dependent Claim
30 words
The invention as claimed in claim 15, wherein said indicating means includes a dished washer and means for flattening said dished washer when said predetermined clamping force is applied. c
Claim 22
Dependent Claim
27 words
The invention as claimed in claim 15, wherein said guard rail attaching means includes at least one bracket for attaching a rigid rail segment to said post.
Claim 23
Dependent Claim
27 words
The invention as claimed in claim 15, wherein said guard rail attaching means includes at least one element for attaching a flexible rail segment to said post.
Claim 24
Dependent Claim
75 words
The invention as claimed in claim 15, wherein said clamping means includes a first tube having a closed end and an open end and a second tube having a closed end and an open end and major portions slidable within said first tube, and further including screw means connecting said closed ends of said first and second tubes, whereby turning of said screw means causes axial movement of said second tube within said first tube.
Claim 25
Dependent Claim
31 words
The invention as claimed in claim 15, wherein said projecting portions of said clamping means have friction enhancing means on structure gripping surfaces to improve clamping action of said clamping means.
Claim 26
Dependent Claim
35 words
The invention as claimed in claim 15, including means cooperating with said clamping means to prevent twisting of at least portions thereof when said clamping means are clamped to edge portions of a mounting structure.
Claim 27
Dependent Claim
23 words
The invention as claimed in claim 23, wherein said twisting preventing means comprise plates adapted to fit adjacent corners of a mounting structure.
Claim 28
Dependent Claim
30 words
The invention as claimed in claim 15, wherein said clamping means includes a first tube and a second tube movable therein, said movement being axial and accomplished by ratcheting means.
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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) | 1979-12-07 | 1980-06-07 | 1980-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-12-07 | 1984-06-07 | 1984-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-12-07 | 1988-06-07 | 1988-12-07 | $7700.00 | Window Closed / Lapsed |