Process for the manufacture of a piston/cylinder assembly

Metal working – Method of mechanical manufacture – Prime mover or fluid pump making

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29888, 164 97, 164137, B22D 3304

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051311445

ABSTRACT:
A process for the manufacture of a master cylinder for hydraulic brake units of automotive vehicles. The starting material is a pasty material which is between solid and liquid. In the course of the casting procedure, thin material wall thicknesses are created in the regions of intended openings of the master cylinder, such as the breather bore (14) and the intake bore (5). The floating membrane (12) which forms during the casting process is removed by mechanical machining to open the duct which functions as the intake bore. The breather bore (14) which functions as the compensation bore is formed by a stamping operation.

REFERENCES:
patent: 4458743 (1984-07-01), Logvinov et al.
patent: 4757857 (1988-07-01), Henkel
patent: 4899799 (1990-02-01), Drazy
patent: 4919189 (1990-04-01), Sato et al.
Websters Ninth New Collegiate Dictionary, definitions of the words "Film", Floating and Membrane, 1984, pp. 463; 473-474, and 740.

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