Abstract A method of making at least two valves, each valve adapted to be pivotally mounted in a hollow member or the like having a valve seat comprising an arcuate wall portion having a pair of parallel top and bottom end surfaces which lie in a circumference of a common circle and a pair of generally oval-shaped side wall portions disposed generally transversely to said arcuate wall portion from opposite side edges thereof, the outer edges of the side walls lying on the circumference of said common circle, consisting of the steps of casting the valves simultaneously and joining the arcuate wall portions with a pair of connecting webs and, therafter, finish grinding the top and bottom end surfaces and the outer edges of the side walls.
A method of making at least two valves, each valve comprising an arcuate wall portion having a pair of parallel top and bottom end surfaces which lie in a circumference of a common circle and a pair of generally oval-shaped side wall portions disposed generally transversely to said arcuate wall portion from opposite side edges thereof, consisting of the steps of casting the valves simultaneously so the arcuate wall portions are connected by at least one connecting web, and the side wall portions of each valve lie in parallel planes and the outer edges of the side walls lie on the circumference of a common circle, thereafter, finish grinding the top and bottom end surfaces and the outer edges of the side walls, and separating the valves at the connecting web generally flush with the arcuate wall portion.
Claim 2
Independent Claim
138 words
A method of making at least two valves, each valve comprising an arcuate wall portion having a pair of parallel top and bottom end surfaces which lie in a circumference of a common circle and a pair of generally oval-shaped side wall portions disposed generally transversely to said arcuate wall portion from opposite side edges thereof, consisting of the steps of casting the valves simultaneously so the arcuate wall portions are connected by at least one connecting web, and the side wall portions of each valve lie in parallel planes and the outer edges of the side walls lie on the circumference of a common circle, thereafter, finish grinding the top and bottom end surfaces and the outer edges of the side walls, and separating the valves at the connecting web generally flush with the arcuate wall portion.