Patent US4968176A successfully refreshed from Google Patents.
US4968176A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforcing bar coupling device
Assignee: Individual
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Filing: 1989-06-09
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Granted: 1990-11-06
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Expires: 2009-06-09
Abstract
Abstract A coupling device for joining the ends of rebars in an overlapping relationship which can be utilized to join the end of one rebar to another which cannot be directly reached, which essentially comprises a body having two elongated and parallel, side-by-side, cylindrical sockets therethrough having a size within which two rebars can be tightly inserted from opposite directions. The edge of the body forming the entrance ends of the sockets being flared out to facilitate insertion of the rebars, and the sides of the body forming the sockets having slits cut therethrough with the edges of the sheet metal adjacent to the slits facing away from the entrance end of the sockets being curved inward to engage the edges of the rebar and lock them in place.
Inventors
- 👤 David M. Balach
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 22:44
CPC Classifications
F; F16; F16B; F16B7/00; F16B7/04; F16B7/0433; E; E04; E04C; E04C5/00; E04C5/16; E04C5/162; E04C5/163; Y; Y10; Y10T; Y10T403/00; Y10T403/71; Y10T403/7129; Y10T403/7141; Y10T403/7152; Y10T403/7171
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
155 words
A coupling device for rebars comprising a body formed of sheet material wherein at least portions thereof are formed around two parallel axes to form two parallel, side-by-side sockets of such size and configuration as a rebar can be tightly inserted axially into each of said sockets, each of said sockets having an opening thereto generally encircling the axis of said socket through which the rebar is axially insertable in the direction of said axis from opposite directions, at least one of said generally circular openings being flared radially outward to permit the axial insertion of said rebar into said socket from a remote location, each of said sockets having a means on said interior surface as will frictionally engage said rebars when inserted sufficient to frictionally hold the rebar in place, and each of said sockets having a stop means to limit the extent to which said rebars can be inserted into said sockets.
Claim 2
Dependent Claim
155 words
A coupling device for rebars comprising a body formed of sheet material wherein at least portions thereof are formed around two parallel axes to form two parallel, side-by-side sockets of such size and configuration as a rebar can be tightly inserted axially into each of said sockets, each of said sockets having an opening thereto generally encircling the axis of said socket through which the rebar is axially insertable in the direction of said axis from opposite directions, at least one of said generally circular openings being flared radially outward to permit the axial insertion of said rebar into said socket from a remote location, each of said sockets having a means on said interior surface as will frictionally engage said rebars when inserted sufficient to frictionally hold the rebar in place, and each of said sockets having a stop means to limit the extent to which said rebars can be inserted into said sockets.
Claim 3
Dependent Claim
38 words
A coupling device according to claim 1 in which said means on the interior surface as will frictionally engage said rebars consists of at least one indentation in the side said socket, said indentation extending into said socket.
Claim 4
Dependent Claim
51 words
A coupling device for rebars according to claim 1 in which said means on the interior surface of said socket as will frictionally engage said rebars consists of a plurality of slits cut through the side of said sockets such that the edges of said slits will circumferentially engage said rebars.
Claim 5
Dependent Claim
35 words
A coupling device for rebars according to claim 3 in which said body is fabricated of expanded sheet metal which is already provided with said cut slits which function as the cut slits as described.
Claim 6
Dependent Claim
28 words
A coupling device according to claim 1 in which both of said circular openings are flared radially outward to facilitate axial insertion of said rebars into said sockets.
Claim 7
Dependent Claim
70 words
A coupling device according to claim 1 in which said body is formed of sheet metal and each of said sockets is formed by providing a plurality of generally parallel cut slits through said sheet metal one over the other to thereby render a plurality of sheet metal strips between each adjacent pair of slits and alternately bending the strips in opposite directions so that said socket is formed thereby.
Claim 8
Dependent Claim
18 words
A coupling device according to claim 1 in which the coupling device is formed of a molded material.
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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) | 1993-11-05 | 1994-05-07 | 1994-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-11-05 | 1998-05-07 | 1998-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-11-05 | 2002-05-07 | 2002-11-06 | $7700.00 | Window Closed / Lapsed |