Lip sealing device for piston flushing valve

A technology of lip seals and flushing valves, which is applied to the sealing of engines, flushing equipment with water tanks, valve operation/release devices, etc., and can solve problems such as changes in friction and uneven flushing volume
CN1285807CInactive Publication Date: 2006-11-22SLOAN VALVE COMPANY
0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SLOAN VALVE COMPANY
Publication Date
2006-11-22
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The present invention relates to a piston member for a flush valve for lavatories and urinals, the flush valve having a valve body with an inlet and an outlet, and a valve seat at the outlet. The piston member is movable within the valve body towards and away from the valve seat to control flow from the inlet to the outlet. In the piston part there is a safety valve for communicating the pressure chamber of the flushing valve with the outlet of the flushing valve. The piston member has an outwardly directed lip seal which bears against the inner wall of the valve body and the lip seal is retained between facing elements of the piston member. The lip seal includes an insert, and an elastomer covering and substantially enveloping the insert. Both the elastomer and the insert have a portion extending towards the flush valve body, and the insert has a support element which contacts a facing element of the piston member, transferring load from such element from the lip Remove from the elastomeric body of the shaped seal.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001]

[01] This invention relates to piston flushometers or flushometers, and more particularly, to improved seals for piston components. During operation of the flush valve, the piston member reciprocates and the lip seal creates a dynamic barrier between the pressure chamber above the piston member and the discharge port below the piston member. An advantage of the piston seal of the present invention is that it requires only less stringent assembly criteria and provides a seal with greatly extended service life and improved flush volume consistency.

[0002]

[02] The lip seal of the present invention acts as a support to keep the piston member sliding along its axis into the bore of the flush valve. The specific seal design reduces the effect of retaining helical torque on the lip geometry. The lip seal includes an insert and an elastomer molded onto the insert. The function of this insert is to reinforce the seal itself. The injection molded parts of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More