US3680277A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Arrangement for connecting concrete or clay bricks, blocks, panels, and slabs
Assignee: Individual
•
Filing: 1970-07-16
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Granted: 1972-08-01
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Expires: 1990-07-16
Abstract
Abstract An arrangement for connecting members such as concrete or clay bricks, blocks, panels, and slabs together wherein the members are provided with opposed mating dovetail grooves when the members are positioned in end to end relationship. A hollow key member, the longitudinally extending surfaces of which are generally concave, is resilient or flexible and may be partially collapsed to fit within the mating dovetail grooves of the members to be interlocked together. The resiliency of the key member tends to expand it and thereby aid in retaining it in position as well as locking the members together.
Inventors
- 👤 Charles H Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 03:27
CPC Classifications
E; E04; E04B; E04B2/00; E04B2/02; E04B2/04; E04B2/06; E04B2/08; E04B1/00; E04B1/38; E04B1/61; E04B1/6108; E04B1/612; E04B1/6145; E04B1/6154; F; F16; F16B; F16B5/00; F16B5/0004; F16B5/0008; F16B5/002; F16B5/0024; F16B5/0032; F16B5/0052; E04B2002/0202; E04B2002/0243; E04B2002/0252
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
152 words
An arrangement for securing members in end-to-end abutting relationship wherein the members each have a vertically extending dovetail groove in their abutting ends comprising: a. an elongated hollow key for fitting in the dovetail grooves in the abutting ends of the members to secure the members together, said key member: 1. having four longitudinally extending side surfaces, each of which is of generally concave configuration; 2. one of said side surfaces having a split extending longitudinally thereof; 3. projections formed on said one side surface on each side of and adjacent the split; and b. said key member positionable within the dovetail grooves so that one of said projections engages the upper surface of one of the abutting members and the other of said projections engages the upper surface of the other of the abutting members, and with the longitudinal split coinciding with the juncture of the abutting ends of the members.
Claim 2
Dependent Claim
152 words
An arrangement for securing members in end-to-end abutting relationship wherein the members each have a vertically extending dovetail groove in their abutting ends comprising: a. an elongated hollow key for fitting in the dovetail grooves in the abutting ends of the members to secure the members together, said key member: 1. having four longitudinally extending side surfaces, each of which is of generally concave configuration; 2. one of said side surfaces having a split extending longitudinally thereof; 3. projections formed on said one side surface on each side of and adjacent the split; and b. said key member positionable within the dovetail grooves so that one of said projections engages the upper surface of one of the abutting members and the other of said projections engages the upper surface of the other of the abutting members, and with the longitudinal split coinciding with the juncture of the abutting ends of the members.
Claim 3
Dependent Claim
11 words
one of said side surfaces having a split extending longitudinally thereof;
Claim 4
Dependent Claim
11 words
one of said side surfaces having a split extending longitudinally thereof;
Claim 5
Dependent Claim
57 words
A joint arrangement comprising: A. two members in end-to-end abutting relationship; b. each of said members having along their abutting ends opposed, complemental, aligned, longitudinally extending slots of dovetail transverse cross-section; c. an elongated, hollow key for fitting in the dovetail grooves in said abutting ends of said members to secure said members together, said key member:
Claim 6
Dependent Claim
57 words
A joint arrangement comprising: A. two members in end-to-end abutting relationship; b. each of said members having along their abutting ends opposed, complemental, aligned, longitudinally extending slots of dovetail transverse cross-section; c. an elongated, hollow key for fitting in the dovetail grooves in said abutting ends of said members to secure said members together, said key member:
Claim 7
Dependent Claim
11 words
one of said side surfaces having a split extending longitudinally thereof;
Claim 8
Dependent Claim
11 words
one of said side surfaces having a split extending longitudinally thereof;
Claim 9
Dependent Claim
170 words
projections formed on said one side surface on each side of and adjacent the split; d. said key member positionable within the dovetail grooves so that one of said projections engages the upper surface of one of said abutting members and the other of said projections engages the upper surface of the other of said abutting members, and with the longitudinal split coinciding with the juncture of the abutting ends of said members whereby said key member projects upwardly from said members; e. an additional pair of members for resting on the upper surface of said two members; and f. each of said additional members having along their abutting ends opposed, complemental, aligned, longitudinally extending slots of dovetail transverse cross-section for engaging with said upwardly projecting key member to secure said additional members in end-to-end abutting relationship and in abutting relationship with the upper surface of said two members and with the longitudinal split in said key member coinciding with the juncture of the abutting ends of said additional members.
Claim 10
Dependent Claim
170 words
projections formed on said one side surface on each side of and adjacent the split; d. said key member positionable within the dovetail grooves so that one of said projections engages the upper surface of one of said abutting members and the other of said projections engages the upper surface of the other of said abutting members, and with the longitudinal split coinciding with the juncture of the abutting ends of said members whereby said key member projects upwardly from said members; e. an additional pair of members for resting on the upper surface of said two members; and f. each of said additional members having along their abutting ends opposed, complemental, aligned, longitudinally extending slots of dovetail transverse cross-section for engaging with said upwardly projecting key member to secure said additional members in end-to-end abutting relationship and in abutting relationship with the upper surface of said two members and with the longitudinal split in said key member coinciding with the juncture of the abutting ends of said additional members.
Claim 11
Dependent Claim
17 words
The invention of claim 2 wherein said dovetail grooves and hollow key member are filled with concrete.
Claim 12
Dependent Claim
74 words
projections formed on said one side surface on each side of and adjacent the split; and b. said key member positionable within the dovetail grooves so that one of said projections engages the upper surface of one of the abutting members and the other of said projections engages the upper surface of the other of the abutting members, and with the longitudinal split coinciding with the juncture of the abutting ends of the members.
Claim 13
Dependent Claim
74 words
projections formed on said one side surface on each side of and adjacent the split; and b. said key member positionable within the dovetail grooves so that one of said projections engages the upper surface of one of the abutting members and the other of said projections engages the upper surface of the other of the abutting members, and with the longitudinal split coinciding with the juncture of the abutting ends of the members.
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) | 1975-08-01 | 1976-01-31 | 1976-08-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-01 | 1980-01-31 | 1980-08-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-01 | 1984-01-31 | 1984-08-01 | $7700.00 | Window Closed / Lapsed |