초록 ▼

A multi-tube hydraulic cylinder includes annular seal assemblies joining adjacent tubes. Each assembly includes an annular primary seal member and an annular base seal member. The primary seal member is formed from relatively soft elastomer and includes inner and outer seal ribs which engage the bot

A multi-tube hydraulic cylinder includes annular seal assemblies joining adjacent tubes. Each assembly includes an annular primary seal member and an annular base seal member. The primary seal member is formed from relatively soft elastomer and includes inner and outer seal ribs which engage the bottom of a seal groove and the surface of an adjacent tube. The primary seal member is mounted on the base seal member, is formed from an elastomer harder than the material in the primary seal member, and includes inner and outer seal ribs and a heel facing outwardly of the seal groove on the end of the base member away from the seal ribs. The base member has an axial length greater than its radial thickness. When the seal assembly is compressed between the two tubes the seal ribs of the two members provide low pressure and high pressure seals for confining hydraulic fluid in the chamber. The heel is biased into the base member and holds the member in the groove to prevent rotation due to frictional engagement with the other tube during relative movement of the tubes.

대표청구항 ▼

A multi-tube hydraulic cylinder includes annular seal assemblies joining adjacent tubes. Each assembly includes an annular primary seal member and an annular base seal member. The primary seal member is formed from relatively soft elastomer and includes inner and outer seal ribs which engage the bot

A multi-tube hydraulic cylinder includes annular seal assemblies joining adjacent tubes. Each assembly includes an annular primary seal member and an annular base seal member. The primary seal member is formed from relatively soft elastomer and includes inner and outer seal ribs which engage the bottom of a seal groove and the surface of an adjacent tube. The primary seal member is mounted on the base seal member, is formed from an elastomer harder than the material in the primary seal member, and includes inner and outer seal ribs and a heel facing outwardly of the seal groove on the end of the base member away from the seal ribs. The base member has an axial length greater than its radial thickness. When the seal assembly is compressed between the two tubes the seal ribs of the two members provide low pressure and high pressure seals for confining hydraulic fluid in the chamber. The heel is biased into the base member and holds the member in the groove to prevent rotation due to frictional engagement with the other tube during relative movement of the tubes. wo walls have respective first wall parts forming a first end section with an inlet part positionable at a body part of a user, and have respective second wall parts forming a second end section defining a conduit channel extending from the inlet part to an outlet part provided at an end of the conduit channel remote from the inlet part, wherein inner sides of the first wall parts are provided with a wetting-inhibiting coating over a substantial portion thereof, and inner sides of the second wall parts are free from the wetting-inhibiting coating, wherein the gripping part protrudes sidewise at the first end section, and wherein the first and second wall parts (2a and 3a or 2b and 3b respectively) are formed by segments of at least one respective one-piece wall part (7, 8, 22) which are designed to fold around a longitudinal fold (10) orientatable in a longitudinal direction of the conduit element (1; 21) and which are connected to one another via edge regions (12a and 13a or 12b and 13b, respectively) of the one-piece wall part (7, 8; 22) each extending at a distance from the longitudinal fold (10). 4. An aid in accordance with claim 3, wherein the edge regions (12b and 13b) of the second wall parts (2b and 3b) are connected with one another to form a correspondingly sectioned wall section of the conduit element (21) along a connection position formed at least approximately in a wave-like manner. 5. A flat-foldable, water-dissolvable urinary aid, comprising a hose-shaped conduit element formed of two walls which lie flatly on one another in a folded condition of the urinary aid and which are made from a softenable and decomposable in water material; and a gripping part connected with the conduit element, wherein the two walls have respective first wall parts forming a first end section with an inlet part positionable at a body part of a user, and have respective second wall parts forming a second end section defining a conduit channel extending from the inlet part to an outlet part provided at an end of the conduit channel remote from the inlet part, wherein inner sides of the first wall parts are provided with a wetting-inhibiting coating over a substantial portion thereof, and inner sides of the second wall parts are free from the wetting-inhibiting coating, wherein the gripping part protrudes sidewise at the first end section, and wherein the wetting-inhibiting coating (18) of the first wall parts (2a and 3a) includes a medical test agent reacting to a certain property of urine of a user.