ApplicationNo. 948451 filed on 09/21/1992
US Classes:92/5R, WITH (1) SIGNAL OR INDICATOR OR (2) INSPECTION WINDOW IN EXPANSIBLE CHAMBER WALL PORTION92/31, RECTILINEARLY MOVING WORKING MEMBER AND COAXIAL OR PARALLEL ELEMENT SLIDABLY INTERENGAGED FOR RELATIVE ROTARY MOVEMENT92/88, SEALED OPENING IN LONGITUDINAL WALL OF CHAMBER FOR RECEIVING WORKING MEMBER PORTION92/110, Hollow stem forms axially extending fluid passage92/117A, Stationary piston or movable piston with moving cylinder92/165R, WITH GUIDE OR SEAL ON CYLINDER END PORTION FOR PISTON OR MEMBER MOVED BY PISTON92/165PRPrevent rotation
ExaminersPrimary: Look, Edward K.
Assistant: Ryznic, John E.
Attorney, Agent or Firm
Foreign Patent References
International ClassesF16J 015/18
AbstractA pressure cylinder in which the piston is hollow and the pressurized fluid is introduced into the hollow of the piston. The cylinder housing includes a core member with supply and exhaust ports. An area between the rear wall of the housing and a rear wall of the piston is exposed to atmospheric pressure at all times, elliminating a need for seals on the outside surface of the piston, and allowing for the piston to be exposed to large transverse forces. Proximity switches are provided in a slot in the upper wall of the cylinder housing to detect the arrival of the piston at its limit positions and a pin secured to the cylinder housing engages a slot in the outer periphery of the piston to guide the forward and rearward movement of the piston within the cylinder. A slot may be provided in the upper wall of the cylinder housing for receipt of a work positioning member secured to the outer periphery of the piston.
Field of SearchWITH (1) SIGNAL OR INDICATOR OR (2) INSPECTION WINDOW IN EXPANSIBLE CHAMBER WALL PORTION
RECTILINEARLY MOVING WORKING MEMBER AND COAXIAL OR PARALLEL ELEMENT SLIDABLY INTERENGAGED FOR RELATIVE ROTARY MOVEMENT
MUTUALLY RELATIVELY MOVABLE CYLINDER OR SLEEVE, MEMBER SEALINGLY SLIDABLE THEREIN AND OUTER CYLINDER THEREFOR
Cylinder or sleeve forms working member
SEALED OPENING IN LONGITUDINAL WALL OF CHAMBER FOR RECEIVING WORKING MEMBER PORTION
ANNULAR WORKING MEMBER OR ANNULAR LINEARLY EXTENDING CHAMBER THEREFOR
WITH AXIALLY EXTENDING ELEMENT MOUNTED ON WORKING MEMBER FOR RELATIVE ROTARY MOVEMENT ONLY
WITH TOOTHED GEAR, SPLINE OR THREAD RIGID WITH WORKING MEMBER
WITH CYLINDER WALL CONTACTING GUIDE ARTICULATED TO PISTON
Stationary piston or movable piston with moving cylinder
WITH GUIDE OR SEAL ON CYLINDER END PORTION FOR PISTON OR MEMBER MOVED BY PISTON
WITH SIGNAL, INDICATOR OR INSPECTION MEANS