Ladder rung implanter

Details Ladder rung implanter Ladder rung implanter

1974-11-13

1976-11-02

Custer, Jr., Granville Y.

Elongated-member-driving apparatus

With means to move or guide member into driving position

With positionable driver

227130, 227156, B27F 702

Patent

active

039891771

ABSTRACT:
An apparatus for mounting steps on the inner wall surface of a manhole section comprises implanting the steps in the section while the same is still green and following removal of the inner form but before removal of the outer form, positioning each step in confronting relation with the manhole section and thereupon smoothly and uniformly, without vibration and hammering, pushing the step into the concrete and compacting the concrete around the implanted step. The apparatus may be portable and shifted into the manhole section through an end thereof after the inner form has been removed but prior to removal of the outer form, and positioned against the base ring at opposite inside diameters thereof and engaging the outer form at the top of the manhole section and while thus engaged urging the step into the manhole section as aforesaid. Alternatively the apparatus may be stationary and the manhole section temporarily moved thereto and supported thereon during step implanting.

REFERENCES:
patent: 2656148 (1953-10-01), Fladung
patent: 2810547 (1957-10-01), Fehlmann
patent: 3027559 (1962-04-01), Moeller et al.
patent: 3767099 (1973-10-01), Maier
patent: 3776443 (1973-12-01), Oefinger

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