Spring-loaded safety valve
First Claim
1. A spring-loaded safety valve with a housing (12 to 16) in which a valve seat (30) is provided between an inlet (12) and an outlet (14) with a closure member (28) which cooperates with the valve seat (30), with a spindle (24) supporting the closure member (28), with a spring arrangement (36) acting on the spindle (24) and with a damping device (50) connected to the spindle (24) which comprises a cup-shaped outer damper part (52) filled with viscous medium (58) and a movable inner damper part (56) coaxial with the outer damper part (52), one of said damper parts being stationary, while the other one is connected to the spindle (24), wherein the damper parts (52, 56) define at least one pair of cylindrical working surfaces positioned opposite each other a small distance apart so as to form therebetween a gap, and a viscous medium (58) occupies at least a part of this gap between these working surfaces, radial dimension of at least one of the working surfaces varying in the direction of relative movement of the damper parts (52-56) so that the width of at least a portion of said gap that contains viscous medium (58) varies in the direction of relative movement.
1 Assignment
0 Petitions
Accused Products
Abstract
A spring-loaded safety valve provided with an integrated damping element that achieves a damping effect by the dissipative action of a shearing current and which involves a single-layer or multiple-layer virtually coaxial arrangement of tubes or active surfaces that can be moved telescopically with respect to one another.
39 Citations
10 Claims
- 1. A spring-loaded safety valve with a housing (12 to 16) in which a valve seat (30) is provided between an inlet (12) and an outlet (14) with a closure member (28) which cooperates with the valve seat (30), with a spindle (24) supporting the closure member (28), with a spring arrangement (36) acting on the spindle (24) and with a damping device (50) connected to the spindle (24) which comprises a cup-shaped outer damper part (52) filled with viscous medium (58) and a movable inner damper part (56) coaxial with the outer damper part (52), one of said damper parts being stationary, while the other one is connected to the spindle (24), wherein the damper parts (52, 56) define at least one pair of cylindrical working surfaces positioned opposite each other a small distance apart so as to form therebetween a gap, and a viscous medium (58) occupies at least a part of this gap between these working surfaces, radial dimension of at least one of the working surfaces varying in the direction of relative movement of the damper parts (52-56) so that the width of at least a portion of said gap that contains viscous medium (58) varies in the direction of relative movement.
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9. A spring-loaded safety valve with a housing (12 to 16) in which a valve seat (30) is provided between an inlet (12) and an outlet (14) with a closure member (28) which cooperates with the valve seat (30), with a spindle (24) supporting the closure member (28), with a spring arrangement (36) acting on the spindle (24) and with a damping device (50) connected to the spindle (24) which comprises a cup-shaped outer damper part (52) filled with viscous medium (58) and a movable inner damper part (56) coaxial with the outer damper part (52), one of said damper parts being stationary, while the other one is connected to the spindle (24), wherein the damper parts (52, 56) define at least one pair of cylindrical working surfaces positioned opposite each other a small distance apart so as to form therebetween a gap, and a viscous medium (58) occupies at least a part of this gap between these working surfaces, the radial dimension of at least one of the working surfaces varying in the direction of relative movement of the damper parts (52-56) so that the width of at least a portion of said gap that contains viscous medium (58) varies in the direction of relative movement, said viscous medium being a silicon grease admixed with graphite.
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10. A spring-loaded safety valve with a housing (12 to 16) in which a valve seat (30) is provided between an inlet (12) and an outlet (14) with a closure member (28) which cooperates with the valve seat (30), with a spindle (24) supporting the closure member (28), with a spring arrangement (36) acting on the spindle (24) and with a damping device (50) connected to the spindle (24) which comprises a cup-shaped outer damper part (52) filled with viscous medium (58) and a movable inner damper part (56) coaxial with the outer damper part (52), one of said damper parts being stationary, while the other one is connected to the spindle (24), wherein the damper parts (52, 56) define at least one pair of cylindrical working surfaces positioned opposite each other a small distance apart so as to form therebetween a gap, and a viscous medium (58) occupies at least a part of this gap between these working surfaces, the radial dimension of at least one of the working surfaces varying in the direction of relative movement of the damper parts (52-56) so that the width of at least a portion of said gap that contains viscous medium (58) varies in the direction of relative movement, said viscous medium being a silicon grease.
Specification