Expansible chamber devices – Piston with rigid axially extending hollow stem – Hollow stem forms axially extending fluid passage
Patent
1981-08-19
1984-12-11
Hershkovitz, Abraham
Expansible chamber devices
Piston with rigid axially extending hollow stem
Hollow stem forms axially extending fluid passage
92130C, 92136, 92138, 92248, F01B 3100
Patent
active
044871112
ABSTRACT:
Apparatus for generating linear motion comprises a body on one end of which is mounted a cylinder. A piston in the cylinder is joined to an actuating beam extending into the body. The actuating beam has moving surfaces that cooperate with fixed surfaces in the body to define a linear bearing. Fluid under pressure is introduced through a duct in the body to a port in the fixed surface of the linear bearing. It enters the space in the cylinder above the piston via a port in a moving surface of the actuating beam which leads to a duct in the actuating beam that opens through the crown of the piston. A resilient sealing member between the fixed and moving surface of the linear bearing maintains fluid-tight communication between the fixed and movable part over their range of relative movement. The actuating beam may carry a rack that drives a pinion through ninety degrees as the piston travels, and two opposed cylinders may be provided to give a reciprocatory movement, or a spring return may be provided.
REFERENCES:
patent: 2251241 (1941-07-01), Kellogg
patent: 2590155 (1952-03-01), Cannon
patent: 3128751 (1964-04-01), Dahl et al.
patent: 3722369 (1973-03-01), Maekawa et al.
patent: 3974803 (1976-08-01), Lassota
patent: 4014249 (1977-03-01), Taylor
patent: 4212324 (1980-07-01), Bauer
patent: 4233887 (1980-11-01), Stoll
patent: 4281588 (1981-08-01), Jashe
Hershkovitz Abraham
Worcester Controls Corporation
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