US 4,733,604 AGranted

Axially slit pressure cylinder with reinforced sealing strip

AssigneePROMA Produkt-und Marketing Gesellschaft m.b.H.

InventorReinhard Lipinski

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Abstract

In a pressure cylinder (1) having an elongated axially slit cylinder structure closed at the ends in which a piston (4) is guided longitudinally slideable which carries a force transfer element (6) extending through an elongated axial slit (5), the elongated axial slit (5) of the cylinder structure is sealed in the longitudinal direction of the cylinder by a flexible sealing strip (7) disposed on the inside of the cylinder structure and held against a sealing surface (10) of the inside of the cylinder structure. To adapt the pressure cylinder (1) to a higher inner pressure the arrangement is such that the elastically deformable sealing strip (7) has a stiffening strip (13) of greater strength which is connected with it and disposed in the inside of the cylinder structure and which is covered in the direction of the piston (4) by the sealing strip (7). On the cylinder structure on both sides of the elongated axial slit (7) and following the sealing surfaces (10) engagement surfaces (14) are disposed, against which the stiffening strip (14) can be supported.

Claims24

Dependent claims

Axially slit pressure cylinder having a cylinder structure (1) formed with an elongated axial slit (5) therein;

a piston (4) guided in the pressure cylinder structure;
an externally projecting force transfer element (6) connected to the piston and extending through said slit;
a flexible sealing strip (7) including sealing lips thereon (9) guided through a first opening region formed in the force transfer element (6) to seal the interior of the cylinder against the outside;
sealing surfaces (10) formed in the interior of the cylinder and positioned in engagement by the sealing lips (9) of the sealing strips;
a flexible cover strip (11) located outside of the cylinder and guided through a second opening region formed in the force transfer element;
releaseable connection means (22, 23;
28) connecting the sealing strip (7) and the cover strip (11) to hold the sealing strip and the cover strip together while permitting separation upon passing through the force transfer element, and reconnection beyond the force transfer element,
and comprising,
a stiffening strip means (13) located in the interior of the cylinder and joined to the flexible sealing strip (7), said stiffening strip means having a higher strength and stiffness than the flexible sealing strip;
engagement surfaces (14) located close to the sealing surfaces (10) and positioned adjacent the sides of the slit (5) in the interior cylinder, forming abutment and support surfaces for the stiffening means and being positioned in at least approximate radial alignment with said stiffening strip means, and
wherein the engagement surfaces (14) are formed with an inner relief recess (16), remote from the longitudinal slit (5).

8 more elements

Dependencies are inferred from the claim text.