Poppet valve seat for an integrated pressure management apparatus

• US 6,623,012 B1
• Filed: 04/05/2000
• Issued: 09/23/2003
• Est. Priority Date: 11/19/1999
• Status: Expired due to Term

• Current Assignee: Siemens Canada Limited (Siemens AG)
• Original Assignee: Siemens Canada Limited (Siemens AG)
• Inventors: Nocent, Dennis, Perry, Paul D.
• Primary Examiner(s): Knight, Anthony
• Assistant Examiner(s): Pickard, Alison K.
• Application Number:
  US09/543,740
• Time in Patent Office: 1,266 Days
• Field of Search: 277/300, 277/502, 277/560, 277/569, 277/572, 277/575, 277/550, 251/333, 251/334, 251/363, 251/364
• US Class Current: 277/550
• CPC Class Codes: F02M 25/0809 Judging failure of purge control system
• CPC Class Codes: F02M 25/0836 Arrangement of valves controlling the admission of fuel vapour to an engine, e.g. valve being disposed between fuel tank or absorption canister and intake manifold
• CPC Class Codes: F02M 25/0854 Details of the absorption canister
• CPC Class Codes: F16K 1/42 Valve seats for double-seat valves F16K1/44

Abstract

A seal for a poppet valve of an integrated pressure management apparatus, a valve system using the poppet valve seal, and a method of cleaning debris off of a poppet valve. The poppet valve is movable between an open position permitting fluid flow through an aperture in a housing and a closed position preventing fluid flow through the aperture. The seal includes an annular body having a first sealing surface fixed to the housing and a second sealing surface confronting the poppet valve. An annular lip projects obliquely from the seal is resiliently deformed by the poppet valve at the closed position, thereby cleaning debris off the sealing surface of the poppet valve.

Claims

1. A seal for a poppet valve of an integrated pressure management apparatus, the poppet valve being movable between an open position permitting fluid flow through an aperture in a housing and a closed position preventing fluid flow through the aperture, the seal comprising:

an annular body surrounding an axis and having first and second sealing surfaces, the first sealing surface being adapted to be fixed to the housing and surround the aperture, and the second sealing surface adapted to confront the poppet valve; and

an annular lip projecting from the second sealing surface and adapted to be resiliently deformed by the poppet valve at the closed position, the annular lip separating from the poppet and projecting obliquely toward the axis in the open position, and the annular lip including an annular tip at a distal end with respect to the annular body, the annular tip being adapted for scrapingly engaging the poppet valve as the poppet valve moves toward the closed position,

wherein the annular tip contracts toward the axis as the poppet valve moves toward the closed position.

2. The seal according to claim 1, wherein the annular body includes a relatively resilient portion and a relatively rigid portion reinforcing the relatively resilient portion.

3. The seal according to claim 2, wherein the relatively resilient portion is molded onto the relatively rigid portion.

4. A seal for a poppet valve of an integrated pressure management apparatus, the poppet valve being movable between an open position permitting fluid flow through an aperture in a housing and a closed position preventing fluid flow through the aperture, the seal comprising:

an annular body surrounding an axis and having first and second sealing surfaces, the first sealing surface being adapted to be fixed to the housing and surround the aperture, and the second sealing surface adapted to confront the poppet valve; and

an annular lip projecting from the second sealing surface and adapted to be resiliently deformed by the poppet valve at the closed position, the annular lip projecting obliquely toward the axis in the open position and defining a hollow frustum, and the hollow frustum having a wall thickness less than 1 millimeter,

wherein the annular lip includes an annular tip portion that scrapingly engages the poppet valve and contracts toward the axis as the poppet valve moves toward the closed position.

5. The seal according to claim 4, wherein the wall thickness is approximately 0.3 millimeters.

6. A seal for a poppet valve of an integrated pressure management apparatus, the poppet valve being movable between an open position permitting fluid flow through an aperture in a housing and a closed position preventing fluid flow through the aperture, the seal comprising:

an annular body surrounding an axis and having first and second sealing surfaces, the first sealing surface being adapted to be fixed to the housing and surround the aperture, and the second sealing surface adapted to confront the poppet valve; and

an annular lip projecting from the second sealing surface and adapted to be resiliently deformed by the poppet valve at the closed position, the annular lip separating from the poppet and projecting obliquely toward the axis in the open position, and the annular lip including an annular tip at a distal end with respect to the annular body, the annular tip being adapted for scrapingly engaging the poppet valve as the poppet valve moves toward the closed position,

wherein the annular body includes a relatively resilient portion and a relatively rigid portion reinforcing the relatively resilient portion,

wherein the relatively resilient portion is molded onto the relatively rigid portion, and

wherein the relatively rigid portion includes at least one channel extending radially with respect to the axis, the relatively resilient portion filling the at least one channel during molding.

7. The seal according to claim 6, wherein the relatively rigid portion is adapted for engaging the housing.

8. A valve system for controlling fluid flow through an integrated pressure management apparatus, the valve system comprising:

a housing having an aperture;

a poppet movable along an axis with respect to the housing, the poppet being movable between an open position permitting fluid flow through the aperture and a closed position preventing fluid flow through the aperture, the poppet including a sealing face resiliently deforming an annular lip at the closed position; and

a seal surrounding the aperture at an interface between the housing and the poppet in the closed position, the seal separating from the poppet in the open position and having the annular lip projecting obliquely toward the axis and the poppet, and the annular lip scraping debris off the sealing face as the poppet moves toward the closed position,

wherein the annular lip includes an annular tip portion that contracts toward the axis as the poppet moves toward the closed position.

9. A method of sealing a movable poppet valve with respect to an aperture in a housing of an integrated pressure management system, the method comprising:

providing a seal positioned at an interface between the poppet valve and the housing, the seal separating from the poppet and having an annular lip projecting obliquely with respect to movement of the poppet valve;

deforming the annular lip upon occluding the aperture with the poppet valve, the deforming including scraping debris off the poppet valve,

wherein the scraping includes radially contracting a tip portion of the annular lip.