Vergil Koch Phones & Addresses
-
Redwood City, CA
Business Records
Name / Title
Company / Classification
Phones & Addresses
President
KOLD-SEAL
PO Box 5823, Redwood City, CA 94063
Publications
Us Patents
Joint-Forming Device
View pageUS Patent:
40908003, May 23, 1978
Filed:
Dec 8, 1976
Appl. No.:
5/748522
Inventors:
Vergil W. Koch - Redwood City CA
International Classification:
E01C 1104
US Classification:
404 48
Abstract:
A device for forming surface joints in hardenable slab type structural materials such as freshly poured concrete is disclosed. The elongated joint former includes a pliable section having a depth which may be approximately one-fourth the thickness of the slab, with outwardly extending fins near its bottom and with a split upper end formed by a pair of separable walls. For implanting the pliable section in a fresh slab prior to its setting, a relatively rigid T-shaped implanting member is inserted into the split and the joint former is driven or vibrated down into the slab until the upper end of the pliable section is approximately even with or slightly below the surface of the slab. The T-shaped member is later removed, leaving an open-topped cavity in the joint into which particle fines eventually accumulate to continually push outwardly on the pliable member on either side of the split and thereby urge the sides of the pliable member against the slab and form an effective water seal during periods of slab expansion and contraction.