US3921800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Capsule for use in fixing rock-bolts
Assignee: DON CONSTRUCTION CHEMICALS Ltd A BRITISH Co
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Filing: 1973-10-26
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Granted: 1975-11-25
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Expires: 1993-10-26
Abstract
Abstract The disclosure is of a capsule comprising a sealed frangible phial containing a hardenable compound with activator and aggregate, sealed by means of at least one shrunken-on cap of cellulosic or viscosic or other membranaceous material.
Inventors
- 👤 Donald Anthony Burns
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:53
CPC Classifications
E; E02; E02D; E02D5/00; E02D5/74; E02D5/80; E02D5/808; E21; E21D; E21D20/00; E21D20/02; E21D20/025; E21D20/026; F; F16; F16B; F16B13/00; F16B13/14; F16B13/141; F16B13/143; Y; Y10; Y10S; Y10S215/00; Y10S215/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
151 words
A capsule for use in fixing a bolt in a masonry mass, comprising a substantially rigid frangible phial body, hardenable compound in an unhardened state within said phial body, at least one hardener substance within said phial body and isolated therein from said hardenable compound, an elastomeric ring surrounding said phial body and spaced from an open end of said phial body, a metal shield surrounding said phial body and a cap made of membranaceous material shrunk upon said phial body and closing said end thereof in a leak-proof manner, a sleeve portion of substantial length of said cap surrounding and gripping said elastomeric ring in place upon said phial body and thereby producing a resilient annular bulge spaced from said end of said phial body, said cap haviNg a marginal portion surrounding and gripping a marginal portion of said shield and gripping said shield in place upon said phial body.
Claim 2
Dependent Claim
151 words
A capsule for use in fixing a bolt in a masonry mass, comprising a substantially rigid frangible phial body, hardenable compound in an unhardened state within said phial body, at least one hardener substance within said phial body and isolated therein from said hardenable compound, an elastomeric ring surrounding said phial body and spaced from an open end of said phial body, a metal shield surrounding said phial body and a cap made of membranaceous material shrunk upon said phial body and closing said end thereof in a leak-proof manner, a sleeve portion of substantial length of said cap surrounding and gripping said elastomeric ring in place upon said phial body and thereby producing a resilient annular bulge spaced from said end of said phial body, said cap haviNg a marginal portion surrounding and gripping a marginal portion of said shield and gripping said shield in place upon said phial body.
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) | 1978-11-24 | 1979-05-26 | 1979-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-11-24 | 1983-05-26 | 1983-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-11-24 | 1987-05-26 | 1987-11-25 | $7700.00 | Window Closed / Lapsed |