F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
251/74
F16K 3/02 (2006.01)
Patent
CA 1276610
ABSTRACT OF THE DISCLOSURE A packingless gate valve is disclosed which includes a housing having opposed similar housing halves with resilient sleeve units which compressibly engage each other in the valve open condition and engage opposite sides of the gate in the valve closed condition. Each sleeve unit has a flange on the inner and outer axial ends, with the flanges extending radially outwardly from the sleeve body. An encircling thin stiffening ring of harder material is bonded to the axially outer surface of the flange on the inner end of each sleeve, each stiffening ring being shaped with a right angle bend so as to provide both axially and radially facing surfaces for each sleeve body. The particular configuration and position of the stiffener rings has been found to function advantageously in preventing the pliable sleeve material from following the gate as it penetrates between the opposed sleeve units. The axially extending portion of the stiffener rings also assists in aligning the opposed sleeves with the housing as well as with each other. The gate valve construction of the present invention results in no leakage to the outside when the valve is fully open and no leakage to the outside or past the gate internally when the valve is fully closed.
524277
Clarkson Curtis W.
Koll Larry F.
Clarkson Company (the)
Gowling Lafleur Henderson Llp
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