Locks – Systems – Operation and control
Patent
1979-06-15
1981-03-03
Frazier, Roy D.
Locks
Systems
Operation and control
180289, 200 83Q, E05B 6538
Patent
active
042533198
ABSTRACT:
A pneumatic central locking mechanism for doors and/or hinged covers of automotive vehicles wherein one pneumatic operating member is provided at the doors or hinged covers to be locked by the central locking operation for locking and unlocking locking devices associated with such doors and covers. A pump, drivable by an electric motor, produces excess pressure and vacuum with a reversing valve being provided for selectively delivering the excess pressure and vacuum to the pneumatic operating members. The reversing valve is operated by a pneumatic operating member which is pneumatically connected in parallel, by way of a throttle, to the operating members associated with the doors and hinged covers. Two double throw switch arrangements are provided with one of the double throw switch arrangements being actuated by the further operating member.
REFERENCES:
patent: Re28142 (1974-09-01), Kazaoka
patent: 2253365 (1941-08-01), Dawson
patent: 2470581 (1949-05-01), Seaman
patent: 2799154 (1957-07-01), Beal
patent: 3045775 (1962-07-01), Pretini
patent: 3105127 (1963-09-01), Peters
patent: 3633391 (1972-01-01), Andres et al.
patent: 4181191 (1980-01-01), Hoffmann et al.
Feichtiger Dieter
Hoffmann Ru/diger
Daimler-Benz Aktiengesellschaft
Frazier Roy D.
Pietruszka Carl F.
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