Claims
- 1. A dispensing valve for dispensing a granular chemical from a chemical container to an application means, the dispensing valve comprising:
- a housing having a passage and a first valve seat;
- a valve member slidably positioned in the housing, the valve member having a sharp edge that engages the first valve seat for sealing the dispensing valve by blocking the passage of the housing;
- a spring for biassing the valve member into a closed position;
- a camming groove for coupling the dispensing valve to a receiving valve by driving the dispensing valve towards a receiving valve wherein the camming groove is provided with a neutral portion for delaying driving the dispensing valve towards a receiving valve; and
- means for engaging a receiving valve on an application means for automatically opening a receiving valve when the dispensing valve is coupled to a receiving valve and automatically closing a receiving valve when the dispensing valve is uncoupled from a receiving valve, the application means is used for applying a granular chemical.
- 2. A dispensing valve as defined by claim 1 further comprising an inner cup on which is located the camming groove and which also defines the means for automatically opening.
- 3. A dispensing valve as defined by claim 1 wherein the valve member is provided with a guide post and the housing with a cooperating guide aperture for guiding the movement of the valve member.
- 4. A dispensing valve as defined by claim 1 wherein the valve member is provided with locking projection for cooperating with a receiving valve for preventing the rotation of the valve member relative to the housing when the dispensing valve is being rotated when coupled to and uncoupled from a receiving valve.
Parent Case Info
This application is a division of application Ser. No. 07/747,559, filed Aug. 20, 1992, now U.S. Pat. No. 5,125,438, which was a division of application Ser. No. 07/530,705, filed May 30, 1990, now U.S. Pat. No. 5,060,701 issued Oct. 29, 1991, which was a division of application Ser. No. 07/329,469 filed Mar. 27, 1989, now abandoned.
US Referenced Citations (29)
Foreign Referenced Citations (3)
Number |
Date |
Country |
858617 |
Oct 1952 |
DEX |
337373 |
May 1959 |
CHX |
505681 |
May 1939 |
GBX |
Divisions (3)
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Number |
Date |
Country |
Parent |
747559 |
Aug 1992 |
|
Parent |
530705 |
May 1990 |
|
Parent |
329469 |
Mar 1989 |
|