Modular polymeric emi/rfi seal
AssigneeSaint-Gobain Performance Plastics Corporation
InventorsDonald M. Munro, Jon M. Lenhert, Karthik Vaideeswaran, Jose R. Sousa
Life of this patent
Estimating the term…
Abstract
A seal includes a seal body including an annular cavity, and an annular spring within the annular cavity. The seal body, the seal body includes a composite material having a thermoplastic material and a filler. The composite material can have a Young's Modulus of at least about 0.5 GPa, a volume resistitivity of not greater than about 200 Ohm-cm, an elongation of at least about 20%, a surface resistitivity of not greater than about 104 Ohm/sq, or any combination thereof.
Claims60
A seal comprising:
- a seal body including an annular cavity, the seal body, the seal body including a composite material having a thermoplastic material and a filler, the composite material has a Young's Modulus of at least about 0.5 GPa and a volume resistitivity of not greater than about 200 Ohm-cm;
- and
- an annular spring within the annular cavity.
A seal comprising:
- a conductive spring;
- and
- a casing surrounding the spring, the casing including a composite material having a thermoplastic and a filler, the composite material has a elongation of at least about 20% and a volume resistitivity of not greater than about 200 Ohm-cm.
A seal comprising:
- a conductive spring;
- and
- a casing surrounding the spring, the casing including a composite material having a thermoplastic and a filler, composite material has a Young's Modulus of at least about 0.5 GPa and a surface resistitivity of not greater than about 104 Ohm/sq.
A seal comprising:
- a conductive spring;
- and
- a casing surrounding the spring, the casing including a composite material having a thermoplastic and a filler, the composite material has a elongation of at least about 20% and a volume resistitivity of not greater than about 200 Ohm-cm.
A system comprising:
- a static component;
- a rotary component, the rotary component rotates relative to the static component, (i) at least a portion of the static component is within a portion of the rotary component or (ii) at least a portion of the rotary component is within a portion of the static component;
- and a seal between the static component and the rotary component;
- the seal comprising:
- a spring;
- and
- a casing surrounding the spring, the casing including a composite material having a thermoplastic and a filler, the composite material has a elongation of at least about 20% and a surface resistitivity of 104 Ohm/sq.
A method of making a seal, comprising:
- forming a casing from a composite material;
- the composite material including a thermoplastic material and a filler, the composite material has a elongation of at least about 20% and a surface resistitivity of not greater than about 104 Ohm/sq;
- machining the casing to form an groove therein;
- and
- inserting a spring within the groove.
Dependencies are inferred from the claim text.