Indexing valve mechanism
First Claim
Patent Images
1. A valve assembly for use in a rotatable valving mechanism, said valve assembly comprising:
- an elongated generally cylindrical mandrel body having a flow bore partially therethrough;
port means through said mandrel body communicating with said flow bore;
a valve sleeve on said mandrel body and having openings through the wall thereof arranged for overlapping said port means;
attachment means for securing said valve sleeve to said body;
loop seal means arranged for snug fitting relationship in said valve sleeve openings against said mandrel body and around said port means;
retention means arranged for sealing engagement in said loop seal means, having flow port means therethrough, and further arranged to retain said seal means in said openings; and
,valve housing means on said valve sleeve adapted for snug rotatable engagement thereon and arranged for sealing engagement with said seal means;
said housing means having housing port means through the wall thereof arranged for selective communication with said flow port means.
0 Assignments
0 Petitions
Accused Products
Abstract
An indexing valve assembly utilizes a mandrel having elastomeric seal means retained by a seal housing containing a seal island over which is slidably located a slotted indexing sleeve.
28 Citations
10 Claims
-
1. A valve assembly for use in a rotatable valving mechanism, said valve assembly comprising:
-
an elongated generally cylindrical mandrel body having a flow bore partially therethrough; port means through said mandrel body communicating with said flow bore; a valve sleeve on said mandrel body and having openings through the wall thereof arranged for overlapping said port means; attachment means for securing said valve sleeve to said body; loop seal means arranged for snug fitting relationship in said valve sleeve openings against said mandrel body and around said port means; retention means arranged for sealing engagement in said loop seal means, having flow port means therethrough, and further arranged to retain said seal means in said openings; and
,valve housing means on said valve sleeve adapted for snug rotatable engagement thereon and arranged for sealing engagement with said seal means;
said housing means having housing port means through the wall thereof arranged for selective communication with said flow port means. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A cylindrical valve assembly comprising:
-
an inner mandrel having a bore passage therein; port means through the wall of said mandrel communicating with said bore passage; a valve sleeve snugly fitting on said mandrel over said port means and having openings overlying said port means, said sleeve being securely attached to said mandrel; loop seal means in snug fitting relationship in said openings, surrounding said port means, and sealingly engaging said mandrel; seal retention island means comprising arcuate plate means adapted for fitting into said valve sleeve openings and forming an equi-spaced perimeter seal channel therewith, said plate means having flow ports therethrough arranged for alignment with said mandrel port means; an angled outer face on said arcuate plate means arranged to wedge said loop seal means snugly against said mandrel; and
,a valve housing slidably and snugly located on said valve sleeve in sealing engagement with said loop seal means and having flow means through the wall thereof arranged to be placed in communication with said flow ports in said plate means. - View Dependent Claims (9, 10)
-
Specification