Non-return valve
First Claim
1. A reversible flap-type non-return valve comprisinga valve housing with two through-flow openings substantially facing each other, said valve housing minimizing its interior volume and having in a first plane the basic cross-sectional form of a trapezoid, the parallel sides of said trapezoid being lower and upper transverse sides of said housing and the non-parallel sides of said trapezoid being transverse sides of the housing including said openings;
- a removable inspection cover forming one side of said housing being substantially plane and disposed substantially parallel to said first plane;
1 Assignment
0 Petitions
Accused Products
Abstract
A non-return valve has a housing being symmetric with respect to a plane perpendicular to the direction of flow, and having facing inlet and outlet openings with surrounding identical valve seats, and identical bearing means adjacent each opening for holding a reversible valve flap. One flat side of the valve housing forms an inspection cover and, together with the opposite parallel flat side, carries the bearing means. Between the flat sides there extend parallel transverse sides and end sides which make an obtuse angle α with one transverse side and an acute angle with the other transverse side. One end side defines the inlet opening and the other end side the outlet opening.
8 Citations
6 Claims
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1. A reversible flap-type non-return valve comprising
a valve housing with two through-flow openings substantially facing each other, said valve housing minimizing its interior volume and having in a first plane the basic cross-sectional form of a trapezoid, the parallel sides of said trapezoid being lower and upper transverse sides of said housing and the non-parallel sides of said trapezoid being transverse sides of the housing including said openings; a removable inspection cover forming one side of said housing being substantially plane and disposed substantially parallel to said first plane; - View Dependent Claims (3, 5, 6)
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2. bearing means attached to the valve housing defining two turning axes perpendicular to said first plane and including two pairs of bearing bushings, each pair having a fixed position one for each of said turning axes and one bearing bushing of each pair being at least in part in said removable inspection cover;
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a movable valve flap disposed at one of the turning axes of the bearing means and suitable as a closing member at both of the two through-flow openings. - View Dependent Claims (4)
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Specification