Patent US4027902A successfully refreshed from Google Patents.
US4027902A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Joint for culvert sections and the like
Assignee: Seibu Polymer Kasei KK
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Filing: 1976-03-23
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Granted: 1977-06-07
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Expires: 1996-03-23
Abstract
Abstract Joint to be used between culvert sections and the like comprising short tubular flexible members made of elastic material to be attached to the ends of adjoining culvert sections and a plurality of strengthening members extending between the ends of these sections. The strengthening members are provided inside and outside of said flexible members and are adjustable to accommodate variations in the gap between the adjoining sections.
Inventors
- 👤 Takayoshi Tanikawa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 18:31
CPC Classifications
E; E03; E03F; E03F3/00; E03F3/04; E02; E02B; E02B3/00; E02B3/16
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
123 words
Joint for connecting culvert sections and the like comprising a. a short tubular flexible member of elastic material each end of which is adapted to be attached to one of the adjacent ends of two aligned culvert sections; b. a plurality of rigid, substantially parallel, closely spaced strengthening members extending between the adjacent ends of said culvert sections both inside and outside of said flexible member to form protective cages around and within said tubular member which substantially inhibit the application of transverse pressure to said tubular member; and c. means for loosely connecting the ends of said strengthening members to the adjacent ends of said culverts so that said strengthening members can swing to permit relative lateral displacement of said culvert sections.
Claim 2
Dependent Claim
123 words
Joint for connecting culvert sections and the like comprising a. a short tubular flexible member of elastic material each end of which is adapted to be attached to one of the adjacent ends of two aligned culvert sections; b. a plurality of rigid, substantially parallel, closely spaced strengthening members extending between the adjacent ends of said culvert sections both inside and outside of said flexible member to form protective cages around and within said tubular member which substantially inhibit the application of transverse pressure to said tubular member; and c. means for loosely connecting the ends of said strengthening members to the adjacent ends of said culverts so that said strengthening members can swing to permit relative lateral displacement of said culvert sections.
Claim 3
Dependent Claim
38 words
Joint as claimed in claim 1, in which said connecting means comprises a pair of anchor members having seats for said tubular flexible members and annular cavities inside and outside of said seats which receive said strengthening members.
Claim 4
Dependent Claim
17 words
Joint as claimed in claim 1, in which said tubular flexible member has a corrugated side wall.
Claim 5
Dependent Claim
22 words
Joint as claimed in claim 1, in which the wall of said tubular flexible member has a large number of annular cavities.
Claim 6
Dependent Claim
29 words
Joint as claimed in claim 2 in which each said strengthening member has a projection at each end thereof which fits loosely into a cavity in an anchor member.
Claim 7
Dependent Claim
20 words
Joint as claimed in claim 1, in which the space between adjacent strengthening members is filled with an elastic material.
Claim 8
Dependent Claim
21 words
Joint as claimed in claim 1, in which said strengthening members consist of pipes and bars slidably inserted in said pipes.
Claim 9
Dependent Claim
96 words
Joint for connecting culvert sections and the like comprising. a. a plurality of anchor members adapted to be fitted between aligned culvert sections; b. a plurality of short tubular flexible members fitted between said plurality of anchor members; and c. a plurality of rigid, substantially parallel, closely spaced strengthening members loosely connected inside and outside of said flexible members between said anchor members such that they can follow lateral displacement of said culvert sections, and form protective cages around and within said tubular members which substantially inhibit the application of transverse pressure to said tubular member.
Claim 10
Dependent Claim
96 words
Joint for connecting culvert sections and the like comprising. a. a plurality of anchor members adapted to be fitted between aligned culvert sections; b. a plurality of short tubular flexible members fitted between said plurality of anchor members; and c. a plurality of rigid, substantially parallel, closely spaced strengthening members loosely connected inside and outside of said flexible members between said anchor members such that they can follow lateral displacement of said culvert sections, and form protective cages around and within said tubular members which substantially inhibit the application of transverse pressure to said tubular member.
References Cited (Backward Citations)
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Cited
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Cited
US3527481A
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US3729939A
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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) | 1980-06-06 | 1980-12-06 | 1981-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-06-06 | 1984-12-06 | 1985-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-06-06 | 1988-12-06 | 1989-06-07 | $7700.00 | Window Closed / Lapsed |