Diaphragm valve for percussive apparatus
AssigneeIngersoll-Rand Company
InventorIan D. Rae
Life of this patent
Estimating the term…
Abstract
A piston valve diaphragm for a percussion apparatus including a valve portion having a diaphragm bore and a fluid supply source. A piston having a first piston surface and a second piston surface are also included. A diaphragm is mounted in the diaphragm bore and is displaceable in a first direction which permits fluid communication between the fluid supply source and the first piston surface and limits fluid passage between the fluid supply source and the second piston surface. Displacement of the diaphragm in a second direction permits fluid communication between the fluid supply source and the second piston surface and limits fluid passage between the fluid supply and the first piston surface. The diaphragm may be formed entirely from a flexible material or may contain a rigid center portion with flexible edge portion.
Claims6
A percussive apparatus comprising:
- (a) a housing having a piston bore therethrough;
- (b) a valve cartridge removably and slidably positioned in said piston bore;
- (c) a fluid inlet valve means for connecting said piston bore to a fluid supply source;
- (d) an actuator handle means for opening and closing said fluid inlet valve means, while simultaneously retaining said valve cartridge in said piston bore;
- (e) a reciprocal piston in said piston bore having a first piston surface and a second piston surface;
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- (f) said valve cartridge comprising:
- (1) a valve body having a wall defining a diaphragm cavity;
- (2) a diaphragm mounted across said cavity, said diaphragm having a first and second diaphragm surface, said diaphragm dividing said cavity into a first fluid cavity in contact with a first diaphragm surface area, and a second fluid cavity in contact with a second diaphragm surface area;
- (3) a first inlet port in said wall in communication with said first fluid cavity and said fluid source;
- (4) a second inlet port in said wall in communication with said second fluid cavity and said fluid source;
- (5) a first outlet port in said valve body adjacent said first diaphragm surface, in communication with said first fluid cavity and said first piston surface;
- (6) a second outlet port in said valve body adjacent said second diaphragm surface, in communication with said second fluid cavity and said second piston surface;
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- (7) said first diaphragm surface area being greater than said second diaphragm surface area, whereby said diaphragm oscillates back and forth into and out of contact with said first and second outlet ports, as said piston reciprocates, to open and close said first and second outlet ports, said first and second inlet ports remaining open during said oscillation.
Dependencies are inferred from the claim text.