Dispensing – With discharge assistant – Container with follower
Patent
1976-01-29
1979-01-09
Husar, Francis S.
Dispensing
With discharge assistant
Container with follower
29401F, 138177, 222413, 308237R, 366 79, 425192R, B29F 102
Patent
active
041334604
ABSTRACT:
A housing for an elongated opening such as a cylindrical passage which has a portion subject to severe conditions such as abrasion, heat, pressure, wear or corrosion which tend to deteriorate the wall of said opening, has a replaceable sleeve in the opening only at the portion exposed to such severe conditions. The housing, illustrated as a metal barrel for a plastic injection molding apparatus, has an elongated aperture or bore having a cross section larger than the desired cross section of the passage. A metal tubular inner sleeve defining the passage is held in the bore of the housing by a tight fit. The sleeve has at least one groove extending longitudinally on the exterior of the sleeve which forms a cavity with the housing wall. The end of the groove at at least the exposed end of the sleeve is closed by a closure portion or ridge. The sleeve can be removed by drilling a hole through the closure portion to permit access to the groove cavity and permit introduction of explosive material into the cavity. Detonating of the explosive material causes the sleeve to collapse, as by fracture into a plurality of pieces, internally of the bore, permitting the sleeve to be easily removed from the housing bore. A replacement sleeve can then be inserted without machining of the housing of the sleeve. Various types of sleeves, and methods of removing and replacing the sleeve are disclosed.
REFERENCES:
patent: 2686335 (1954-08-01), Gross
patent: 2984173 (1961-05-01), Roche et al.
patent: 3089230 (1963-05-01), Chapman et al.
patent: 3188152 (1965-06-01), Miller
patent: 3250542 (1966-05-01), Winnen et al.
patent: 3439586 (1969-04-01), Holtan et al.
patent: 3529873 (1970-09-01), Spieth
patent: 3900188 (1975-08-01), Seufert
patent: 3910316 (1975-10-01), Reifenhauser
Husar Francis S.
Rosenbaum Mark
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