Master-key piston lock

Details Master-key piston lock Master-key piston lock

1981-07-13

1983-10-18

Husar, Cornelius J.

Locks

Operating mechanism

Key

70337, 70364A, 70409, E05B 1906, E05B 2704, E05B 3510

Patent

active

044098073

ABSTRACT:
The invention relates to a master-key piston lock comprising a cylindrical rotor pivoting in a bore of a stator, the said stator comprising radial holes opening into the said bore and in each of which there slides a stator piston spring-loaded towards the said bore, the said rotor comprising an axial key passage into which there open radial holes open at their other extremities at the peripheral surface of the rotor, a right circular-cylindrical rotor piston sliding in each of the said radial holes of the rotor and a key equipped with coded notches co-operating each with the inner extremity of one of the said stator pistons in such manner that the outer extremity of each of the rotor pistons is flush with the peripheral surface of the rotor.
The rotor pistons comprise a shoulder with which there can co-operate the notches of a master key.

REFERENCES:
patent: 420174 (1890-01-01), Taylor
patent: 446192 (1891-02-01), Sargent
patent: 588026 (1897-08-01), Stadtmuller
patent: 806361 (1905-12-01), Pickop
patent: 3412588 (1968-11-01), Schwegler
patent: 4137739 (1979-02-01), Keller
patent: 4343166 (1982-08-01), Hofmann

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