Sealing assembly for a spring brake actuator
AssigneeBendix Commercial Vehicle Systems LLC
InventorWill E Roberts
Life of this patent
Estimating the term…
Abstract
A sealing assembly for installation on a port of a spring brake actuator includes a plug, a one-way valve and a cap. The plug receives the one-way valve for providing one-way air flow through the orifices and maintaining about two psi in the spring brake chamber at zero stroke. An elastomeric piece is affixed to a first set of segments of the plug for sealing against an inner surface of the port. The cap has arms sized to extend around a third set of segments of the plug and snap onto the plug. A fourth set of segments of the plug elastically deform so the sealing assembly can be installed and removed from the port easily.
Claims14
A sealing assembly for a spring brake actuator comprising:
- a plug, the plug comprising
- a circular planar section having a central opening and at least two orifices arranged outside an outer diameter of the central opening;
- a first set of segments on a first surface of the circular planar section arranged to fit within an inner diameter of a port of the spring brake actuator;
- a second set of segments on the first surface of the circular planar section arranged to fit outside an outer diameter of the port of the spring brake actuator;
- an elastomeric piece affixed between the first set of segments and the second set of segments for sealing against an inner surface of the port;
- a third set of segments on a second surface of the circular planar section arranged to receive a cap;
- and
- a fourth set of segments arranged around the outer circumference of the circular planar section defining the length of the plug, each of the fourth set of segments having a curved portion at one end and a protrusion at an opposite end;
- and
- a one-way valve fit in the central opening for providing one-way air flow through the at least two orifices;
- and
- a cap, the cap having arms sized to extend around the third set of segments and snap onto the first surface of the circular planar section, wherein the cap forms a chamber when mated with the plug.
A spring brake actuator for an air brake system comprising:
- a housing defining a spring brake chamber;
- an aperture in the spring brake chamber of the housing;
- a port affixed to the spring brake chamber of the housing for providing access to the aperture, the port having a smooth inner surface and a groove on an outer surface;
- a sealing assembly installed on the port, the sealing assembly comprising:
- a plug, the plug comprising
- a circular planar section having a central opening and at least two orifices arranged outside an outer diameter of the central opening;
- a first set of segments on a first surface of the circular planar section arranged to fit within an inner diameter of the port;
- a second set of segments on the first surface of the circular planar section arranged to fit outside an outer diameter of the port and affix to the groove of the port;
- an elastomeric piece molded to the first set of segments for sealing against the smooth inner surface of the port;
- a third set of segments on a second surface of the circular planar section arranged to receive a cap;
- a fourth set of segments arranged around the outer circumference of the circular planar section defining the length of the plug, each of the fourth set of segments having a curved portion at one end and a protrusion at an opposite end for fitting within the groove of the port;
- a one-way valve fit in the central opening for providing one-way air flow through the at least two orifices;
- and
- a cap, the cap having arms sized to extend around the third set of segments and snap onto the first surface of the circular planar section, wherein the cap forms a chamber when mated with the plug.
Dependencies are inferred from the claim text.