US3759285A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Pre cast base and method for manholes and the like
Assignee: Individual
•
Filing: 1972-12-11
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Granted: 1973-09-18
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Expires: 1992-12-11
Abstract
Abstract Pre-cast base for access pits such as manholes and the like includes resilient rubber-like sealing means and method of positioning same at desired locations. The sealing means is anchored in monolithically cast wall and bottom portions of the base and enables precise positioning of the base at a desired location while maintaining sealed joints at the juncture between the base and inlet and/or outlet pipes, and permits universal independent movement of either said pipes or of the base to maintain the seal and yet accommodate changing job conditions.
Inventors
- 👤 R Yoakum
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 17:21
CPC Classifications
E; E03; E03F; E03F5/00; E03F5/02; E03F5/021; B; B28; B28B; B28B23/00; B28B23/0043; F; F16; F16L; F16L21/00; F16L21/02; F16L5/00; F16L5/02; Y; Y10; Y10T; Y10T137/00; Y10T137/6851; Y10T137/6966; Y10T137/6991
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
110 words
A pre-formed base for access pits such as manholes and the like for automatically effecting and maintaining a seal between an opening in said base and an underground piping system while permitting independent universal relative movement of either said base or said piping system comprising in combination a base portion having a continuous tube-like wall portion upstanding therefrom and defining an opening extending through said wall portion, and annular elastomeric sealing means fixed to said wall portion in registry with said opening and simultaneously effecting sealing pressure against said wall portion and against said conduit means when a conduit portion of said piping system is removably inserted into said opening.
Claim 2
Dependent Claim
110 words
A pre-formed base for access pits such as manholes and the like for automatically effecting and maintaining a seal between an opening in said base and an underground piping system while permitting independent universal relative movement of either said base or said piping system comprising in combination a base portion having a continuous tube-like wall portion upstanding therefrom and defining an opening extending through said wall portion, and annular elastomeric sealing means fixed to said wall portion in registry with said opening and simultaneously effecting sealing pressure against said wall portion and against said conduit means when a conduit portion of said piping system is removably inserted into said opening.
Claim 3
Dependent Claim
28 words
A base according to claim 1 wherein said wall portion defines at least two such openings and said base portion includes a flow channel extending between said openings.
Claim 4
Dependent Claim
18 words
A base according to claim 1 wherein said wall portion is monolithically cast concrete encompassing said sealing means.
Claim 5
Dependent Claim
37 words
Structure according to claim 1 wherein said sealing means includes a flexible serration depending therefrom and extending into said central opening therein and sealingly-engaging said conduit means when said conduit means is inserted into said central opening.
Claim 6
Dependent Claim
117 words
A seal adapted to be fixed to a tubular wall portion of a monolithically cast concrete pre-formed structure comprising in combination an annular elastomeric body having generally cylindrical inner and outer surfaces encompassing a central opening extending through said body, said body having a depending portion extending outwardly from said outer surface and adapted to be integrally formed with said tubular wall portion, and said body being readily deformable and simultaneously effecting sealing pressure against said wall portion and against a conduit means when said body is fixed to said wall portion and said pipe means is removably inserted into said central opening and permitting independent universal relative movement of either said structure or said conduit means.
Claim 7
Dependent Claim
117 words
A seal adapted to be fixed to a tubular wall portion of a monolithically cast concrete pre-formed structure comprising in combination an annular elastomeric body having generally cylindrical inner and outer surfaces encompassing a central opening extending through said body, said body having a depending portion extending outwardly from said outer surface and adapted to be integrally formed with said tubular wall portion, and said body being readily deformable and simultaneously effecting sealing pressure against said wall portion and against a conduit means when said body is fixed to said wall portion and said pipe means is removably inserted into said central opening and permitting independent universal relative movement of either said structure or said conduit means.
Claim 8
Dependent Claim
19 words
A seal according to claim 5 wherein said inner surface includes a flexible serration depending from said inner surface.
Claim 9
Independent Claim
68 words
A method of manufacture of a pre-cast portion of an access pit for underground piping systems comprising the steps of assembling an annular elastomeric seal body on a mandrel, fixing said assembly to one of a pair of form members and positioned between said members, pouring concrete between said form members and around said asSembly, and removing said form members and said mandrel after said concrete has set.
Claim 10
Independent Claim
68 words
A method of manufacture of a pre-cast portion of an access pit for underground piping systems comprising the steps of assembling an annular elastomeric seal body on a mandrel, fixing said assembly to one of a pair of form members and positioned between said members, pouring concrete between said form members and around said asSembly, and removing said form members and said mandrel after said concrete has set.
Claim 11
Dependent Claim
22 words
Method according to claim 7 wherein said fixing step includes evacuating an enclosed space between said mandrel and said one form member.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-17 | 1977-03-19 | 1977-09-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-17 | 1981-03-19 | 1981-09-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-17 | 1985-03-19 | 1985-09-18 | $7700.00 | Window Closed / Lapsed |