Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1983-03-09
1985-10-22
Goldberg, Howard N.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
2940212, 2940214, 2940215, 2940218, 295275, 29530, 2940201, 2940209, 164 921, 264 36, 264227, 264267, 264269, 415196, 415DIG5, B23P 1500
Patent
active
045479410
ABSTRACT:
The cast iron housing of a pump for conveying gravel or the like can be repaired by inserting into a recess in its internal surface a casting which at least substantially fills the recess. The recess develops as a result of washout, cavitation and/or other influences when the housing is in use. The casting is obtained by pouring molten metal into an impression which is formed in a mold by a pattern obtained by filling the recess with a hardenable plastic surface. The impression is overlapped by a cover having a surface which is complementary to the internal surface of the housing, and such cover is used for admission of molten metal as well as for escape of air from the impression. The casting is fastened to the housing by bolts portions of which are embedded in the casting during pouring of molten metal and extend through complementary holes of the housing or through the deepmost portion of the recess if the latter extends all the way between the internal and external surfaces of the housing. In addition to or in lieu of mechanical fasteners, the casting can be secured to the housing by adhesive. A seal can be inserted between the casting and the housing so as to prevent leakage of flowable substances into the recess around the casting. A casting can be removed after a certain period of wear to be replaced with a fresh casting so that the useful life of the housing can be extended beyond the useful life of a single casting.
REFERENCES:
patent: 1397167 (1921-11-01), Hopper
patent: 2252986 (1941-08-01), Scott
patent: 2369415 (1945-02-01), Sherman
patent: 3136044 (1964-06-01), Funk et al.
patent: 3229361 (1966-01-01), Valacich
patent: 3934107 (1976-01-01), Evertz
patent: 4231982 (1980-11-01), Jansson
Goldberg Howard N.
Kontler Peter K.
Soudbrase-Schweisstechnik GmbH
Wallace Ronald S.
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