Patent US4063397A successfully refreshed from Google Patents.
US4063397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bar spacer for reinforced concrete
Assignee: Vanguard Plastics Ltd
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Filing: 1976-11-08
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Granted: 1977-12-20
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Expires: 1996-11-08
Abstract
Abstract A bar spacer for concrete reinforcing bars. The spacer comprises, a foot portion to contact a form for concrete. A bar gripping portion is adapted to grip reinforcing bar for concrete. A plurality of spaced teeth are formed on the internal surface of the bar gripping portion. The teeth are arranged so that each tooth is out of alignment with the tooth next to it whereby each tooth can bend to a position past its neighboring tooth. This ensures that each spacer can grip and locate bars of varying diameter.
Inventors
- 👤 James Follows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 13:54
CPC Classifications
E; E04; E04C; E04C5/00; E04C5/16; E04C5/20
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
82 words
A bar spacer for concrete reinforcing bars comprising: a foot portion to contact a form for concrete; a bar gripping portion with an interior surface having two opposing groups of spaced teeth adapted to grip a reinforcing bar for concrete; each tooth being out of alignment with each adjacent tooth in the same group, whereby each tooth can bend to a position past the adjacent tooth in the same group so that each spacer can grip and locate bars of varying diameter.
Claim 2
Dependent Claim
82 words
A bar spacer for concrete reinforcing bars comprising: a foot portion to contact a form for concrete; a bar gripping portion with an interior surface having two opposing groups of spaced teeth adapted to grip a reinforcing bar for concrete; each tooth being out of alignment with each adjacent tooth in the same group, whereby each tooth can bend to a position past the adjacent tooth in the same group so that each spacer can grip and locate bars of varying diameter.
Claim 3
Dependent Claim
13 words
A bar spacer as claimed in claim 1 molded from high density polyethylene.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-12-19 | 1981-06-20 | 1981-12-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-12-19 | 1985-06-20 | 1985-12-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-12-19 | 1989-06-20 | 1989-12-20 | $7700.00 | Window Closed / Lapsed |