Dispensing – With discharge assistant – Container with follower
Patent
1980-05-30
1982-01-19
Scherbel, David A.
Dispensing
With discharge assistant
Container with follower
141383, G01F 1100
Patent
active
043112587
ABSTRACT:
An improved tuck pointing gun for repairing masonry structures and the like is provided which includes an elongated, tubular, mortar-receiving barrel, along with an improved, axially shiftable plunger within the barrel which is selectively shiftable therein through the usual ratchet rod and trigger mechanism associated with such guns. The plunger includes a thin, flat, circular, metallic plate having an annular, flexible member coupled thereto. The flexible member includes a forward beveled lip, a radially restricted portion at the region of the plate, and a rearwardly and outwardly extending annular trailing section which engages the barrel wall. The improved plunger wipes the barrel wall as tuck pointing operations proceed, in order to clear such walls of mortar material; the outlet end of the barrel is further provided with an annular, inwardly extending element which nestingly receives the forward lip of the plunger when the latter is at the end of its stroke, and this further assures substantially complete clearing of the barrel during use. The annular trailing section is designed to permit inward deflection thereof in the event that a flow-preventing blockage is presented at the outlet end of the barrel. This assures that the ratchet rod and trigger mechanism is not damaged when such a blockage occurs.
REFERENCES:
patent: 3168120 (1965-02-01), Cypser
patent: 3655101 (1972-04-01), Dorn
patent: 4077493 (1978-03-01), Spaude et al.
patent: 4247023 (1981-01-01), Show
Clark Dale W.
Scherbel David A.
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