Power plants – Pressure fluid source and motor – Pulsator
Patent
1984-04-11
1985-04-16
Hershkovitz, Abraham
Power plants
Pressure fluid source and motor
Pulsator
60588, 60581, 277183, 277189, 403344, B60T 1108
Patent
active
045107530
ABSTRACT:
A fast-fill master cylinder (14) includes a housing (26) defining a bore (38) therein having a portion (y) thereof of substantially constant diameter. A primary piston (54) is movably received in the bore portion (y) and a secondary piston (56) is movably received in the remainder of the bore (38). The secondary piston (56) cooperates with the housing (26) to define a secondary variable-volume chamber (62). The primary piston (54) cooperates with the housing (26) and with the secondary piston (56) to define aprimary variable-volume chamber (58). The primary piston also cooperates with the housing to define a constant-volume recess (84) circumscribing the piston (54). An annular partition member (94) circumscribes the piston member (54) within the recess (84) to divide the recess (84) into a pair of variable-volume compartments (108, 110). A bore 120 communicates the one compartment (110) with the primary chamber (58). When the piston members (54 and 56) are moved to contract the chambers (58 and 62), the one compartment (110) is also contracted to communicate pressurized liquid to the primary chamber (58) via the bore (120).
REFERENCES:
patent: 793623 (1905-06-01), Bowen
patent: 860369 (1907-07-01), Grundy
patent: 2191444 (1940-02-01), Fleming
patent: 2306800 (1942-12-01), Caldwell
patent: 2672009 (1954-03-01), Hense
patent: 4032159 (1977-06-01), Zitting
patent: 4128249 (1978-12-01), Manzini
patent: 4301653 (1981-11-01), Carre
patent: 4441320 (1984-04-01), Gaiser
Allied Corporation
Decker Ken C.
Hershkovitz Abraham
Palguta Larry J.
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