Serviceable check valve
First Claim
1. In a check valve of the type having a relatively rigid inflow housing portion with an inflow bore therethrough, a relatively rigid outflow housing portion with an outflow bore therethrough, and a relatively flexible disk member retained between the inflow and outflow housing portions for permitting fluid flow from the inflow bore to the outflow bore and for blocking fluid flow from the outflow bore to the inflow bore, the improvement in combination therewith comprising interengaging threads on the inflow and outflow housing portions for threadably retaining the inflow and outflow housing portions together and interengaging circumferential tongue and groove means on the inflow and outflow housing portions for providing a circumferential seal between the inflow and outflow housing portions wherein the tongue and groove means further comprise nesting trapezoidal cross sections.
2 Assignments
0 Petitions
Accused Products
Abstract
An improved check valve assembly of the type having a relatively flexible disc member retained between relatively rigid inflow and outflow housing portions. The inflow and outflow housing portions are removably threadably interengaged to permit serviceability of the check valve and the relatively flexible disc member has a generally perpendicular stem extending into the bore of one of the housing portions to avoid misalignment of the disc with the housing. A tongue and groove means circumferentially seals the housing portions together by deforming to a common taper angle between the tongue and groove to provide sealing therebetween.
38 Citations
11 Claims
- 1. In a check valve of the type having a relatively rigid inflow housing portion with an inflow bore therethrough, a relatively rigid outflow housing portion with an outflow bore therethrough, and a relatively flexible disk member retained between the inflow and outflow housing portions for permitting fluid flow from the inflow bore to the outflow bore and for blocking fluid flow from the outflow bore to the inflow bore, the improvement in combination therewith comprising interengaging threads on the inflow and outflow housing portions for threadably retaining the inflow and outflow housing portions together and interengaging circumferential tongue and groove means on the inflow and outflow housing portions for providing a circumferential seal between the inflow and outflow housing portions wherein the tongue and groove means further comprise nesting trapezoidal cross sections.
- 10. In the check valve of the type having a relatively rigid inflow housing with an inflow bore therethrough, a relatively rigid outflow housing portion with an outflow bore therethrough and a relatively flexible disc member retained between the inflow and outflow housing portions for permitting fluid flow from the inflow bore to the outflow bore and for blocking fluid flow from the outflow bore to the inflow bore, the improvement in combination therewith comprising a stem formed integral with and extending generally perpendicularly from the relatively flexible disc member and received in the inflow bore wherein the disc member is urged against the inflow housing portion by the outflow housing portion.
Specification