Brakes – Internal-resistance motion retarder – Having a thrust member with a variable volume chamber
Patent
1974-07-09
1976-03-16
Blix, Trygve M.
Brakes
Internal-resistance motion retarder
Having a thrust member with a variable volume chamber
200 34, F16F 904
Patent
active
039440303
ABSTRACT:
In a mechano-pneumatic timer device having a vessel, a membrane piston with its skirt fixedly attached to the vessel for defining jointly a variable volume chamber, a spring for urging the piston in its expanding direction, a check valve cooperating with the piston for evacuating air from the chamber to the outside atmosphere when the piston is contracted, a passage for supplementing air from open atmosphere to the chamber when negative pressure prevails in the chamber by virtue of the expanding movement of the piston for a performing predetermined time-limiting operation of the timer, and a device cooperating with the passage for allowing a limited flow rate of the air drawn by the piston, with the device consisting of a composite sheet having a main body formed lengthwise of pervious material such as foamed synthetic resin and a non-pervious cover layer integral with the main body in facial engagement with the passage.
REFERENCES:
patent: 2508224 (1950-05-01), Carter
patent: 2735671 (1956-02-01), Kuhn
patent: 3040842 (1962-06-01), Charbonneau
patent: 3187121 (1965-06-01), Mingrone
patent: 3293384 (1966-12-01), Voigt
patent: 3425679 (1969-02-01), Risso
Blix Trygve M.
Kawaguchiko Seismitsu Co., Ltd.
Kazenske Edward R.
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