Claims
- 1. A marking instrument comprising a body, a reservoir chamber defined within the body, a liquid feed device having a feed channel for conducting liquid from the reservoir chamber to a marking tip formed at one end of the feed device, and valve means for controlling communication between the reservoir chamber and the feed channel, said valve means including an elastomeric member partly confining the reservoir chamber and located adjacent a portion of the liquid feed device, whereby the liquid feed device is retractable relative to the body under a force exerted against the marking tip, and in response to such retraction the reservoir chamber is first pressurized by deflection of the elastomeric member and the feed channel is thereafter opened to said reservoir chamber to allow liquid to enter the feed channel from the reservoir chamber, said valve means further including a valve seat provided on the feed device, a portion of the elastomeric member arranged to cooperate with the valve seat, said valve seat having at least one port opening in fluid communication between said feed channel and said reservoir chamber when said liquid feed device is retracted relative to said body under a force exerted against said marking tip, said port being closed by said cooperating portion of said elastomeric member when said force is no longer exerted against said marking tip.
Priority Claims (1)
Number |
Date |
Country |
Kind |
9120517 |
Sep 1991 |
GBX |
|
Parent Case Info
This is a continuation of application Ser. No. 08/211,176, filed Mar. 21, 1996 now abandoned.
US Referenced Citations (36)
Foreign Referenced Citations (27)
Number |
Date |
Country |
220924 |
Apr 1957 |
AUX |
2100 |
May 1900 |
ATX |
0413273A1 |
Feb 1991 |
EPX |
0476492 |
Oct 1991 |
EPX |
942622 |
Sep 1948 |
FRX |
2216125 |
Feb 1973 |
FRX |
2604640 |
Oct 1987 |
FRX |
926054 |
Apr 1955 |
DEX |
59-120184 |
Aug 1984 |
JPX |
61-179799 |
Aug 1986 |
JPX |
61-192884 |
Dec 1986 |
JPX |
62-199492 |
Sep 1987 |
JPX |
2-20982 |
Feb 1990 |
JPX |
2-36399 |
Aug 1990 |
JPX |
2-36398 |
Aug 1990 |
JPX |
3-13396 |
Jan 1991 |
JPX |
3-73398 |
Mar 1991 |
JPX |
3-70989 |
Jul 1991 |
JPX |
4-85094 |
Mar 1992 |
JPX |
4-119897 |
Apr 1992 |
JPX |
4-119898 |
Apr 1992 |
JPX |
4-332697 |
Nov 1992 |
JPX |
4-332698 |
Nov 1992 |
JPX |
5-7822 |
Jan 1993 |
JPX |
2052397 |
Jun 1980 |
GBX |
2170697 |
Feb 1985 |
GBX |
WO8908563 |
Mar 1989 |
WOX |
Continuations (1)
|
Number |
Date |
Country |
Parent |
211176 |
Mar 1994 |
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