US3926400A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Tie rod and seal assembly
Assignee: CONSTRUCTION ENGINEERING PRODUCTS
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Filing: 1973-12-03
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Granted: 1975-12-16
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Expires: 1993-12-03
Abstract
Abstract A seal member is provided for use in concrete wall form construction which sealingly engages with a form bore through which a tie rod supporting the seal member passes so as to prevent leakage of wet concrete from the from. The seal member comprises a cylindrical member which is radially expanded into sealing engagement with the form bore by means of a partly tapered seal element in the form of an off-set retainer core. Sealing is automatically achieved by means of the seal member to be axially moved by the form wedges during locking up of the form. Alternate embodiments provide a radially expanding seal, which is expanded by axial movement of the seal member, as well as an off-set retainer core. The offset enables the frustoconically shaped cones or insert members to function both to form a depression in the cast concrete, as well as to serve as spreaders for location of the wall forms. Additional embodiments provide a rubber ring seal, together with shield members; yet another embodiment provides a sealing sleeve.
Inventors
- 👤 Eugene K Franc
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:57
CPC Classifications
E; E04; E04G; E04G17/00; E04G17/06; E04G17/07; E04G17/0707; E04G17/0721
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
202 words
A tie rod and seal assembly in combination with a pair of spaced-apart wall forms for use in temporarily positioning said pair of spaced-apart wall forms, said tie rod and seal assembly comprising a generally elongated tie rod defining an axis and opposite ends, each of said rod ends being adapted to project through a respective bore in said spaced-apart wall forms, spreader means on said tie rod exterior to said form bores and adapted to contact the interior surfaces of the wall forms adjacent to said form bores for positioning said wall forms, and generally cylindrical seal means on each of said rod ends for positioning within and sealing against each said bore in said wall forms for preventing ingress and egress of fluid, said seal means including a generally cylindrical collar of resilient material mounted on the tie rod end and further including expansion means for radially expanding said collar in each said bore, and wherein said expansion means comprises a seal element mounted on the tie rod end adapted to be positioned within each said bore in said wall forms and having a smaller diameter portion and a larger diameter portion joined by an intermediate tapered frustoconical surface portion.
Claim 2
Dependent Claim
202 words
A tie rod and seal assembly in combination with a pair of spaced-apart wall forms for use in temporarily positioning said pair of spaced-apart wall forms, said tie rod and seal assembly comprising a generally elongated tie rod defining an axis and opposite ends, each of said rod ends being adapted to project through a respective bore in said spaced-apart wall forms, spreader means on said tie rod exterior to said form bores and adapted to contact the interior surfaces of the wall forms adjacent to said form bores for positioning said wall forms, and generally cylindrical seal means on each of said rod ends for positioning within and sealing against each said bore in said wall forms for preventing ingress and egress of fluid, said seal means including a generally cylindrical collar of resilient material mounted on the tie rod end and further including expansion means for radially expanding said collar in each said bore, and wherein said expansion means comprises a seal element mounted on the tie rod end adapted to be positioned within each said bore in said wall forms and having a smaller diameter portion and a larger diameter portion joined by an intermediate tapered frustoconical surface portion.
Claim 3
Dependent Claim
62 words
The invention of claim 1 wherein said collar has a hollow interior and defines an inner and an outer diameter, said smaller diameter portion of said seal element being less than and said larger diameter portion being respectively greater than said inner diameter, whereby axial advancement of said collar parallel to said rod axis over said tapered portion causes radial expansion thereof.
Claim 4
Dependent Claim
31 words
The invention of claim 2 wherein the smaller diameter portion of said seal element includes a cylindrical extension along said tie rod in a direction opposed to the associated spreader means.
Claim 5
Dependent Claim
52 words
The invention of claim 1 wherein said spreader means comprises an insert member positioned against a stop member on said tie rod and means for axially offsetting said insert member with respect to said collar whereby said insert member is adapted to be positioNed against the interior surfaces of the wall form.
Claim 6
Dependent Claim
17 words
The invention of claim 4 wherein said insert member is generally frustoconical in shape for molding depressions.
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) | 1978-12-15 | 1979-06-16 | 1979-12-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-12-15 | 1983-06-16 | 1983-12-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-12-15 | 1987-06-16 | 1987-12-16 | $7700.00 | Window Closed / Lapsed |