Claims
- 1. An improved caulking cartridge, of the type having a substantially tubular body with a wall having an inner wall surface defining an inner diameter of the tubular body, a forward dispensing opening at a forward end of the tubular body, a backwall movably disposed within the tubular body, and the tubular body defining a chamber therein bounded by the inner wall surface, the forward end and the backwall, for storing therein a composition to be dispensed through the forward dispensing opening, the improvement which comprises:said backwall having a skirt formed thereon pointing backwardly away from said backwall and being formed with a stop surface distally from said backwall; said skirt having an outer diameter less than the inner diameter of the tubular body and forming a space between said skirt and the inner wall surface; a sealing ring disposed in said space between said skirt and the inner wall surface and sealing against the inner wall surface, said sealing ring having an axial width less than a spacing distance between said stop surface and said backwall, such that said backwall together with said skirt can be axially moved through a given distance while said sealing ring remains stationary on the inner wall surface.
- 2. The caulking cartridge according to claim 1, wherein said backwall has an outer diameter substantially equal to the inner diameter of the tubular body.
- 3. The caulking cartridge according to claim 1, wherein said backwall has a shape substantially complementary to a shape of the forward end of the tubular body, for substantially completely purging the composition from the tubular body when the backwall is pushed against the forward end.
- 4. The caulking cartridge according to claim 1, wherein said skirt is formed with a spacer ring defining said stop surface at the end thereof distal from said backwall.
- 5. The caulking cartridge according to claim 1, wherein said given distance corresponds to a difference between the axial width of said sealing ring and the spacing distance between said stop surface and said backwall.
Priority Claims (2)
Number |
Date |
Country |
Kind |
9401492 |
Sep 1994 |
NL |
|
0103845 |
Dec 1999 |
NL |
|
Parent Case Info
This is a continuation-in-part of my application Ser. No. 09/322,788, filed May 28, 1999, now U.S. Pat. No. 6,119,903; which was a division of application Ser. No. 08/990,349, filed Dec. 15, 1997, now U.S. Pat. No. 5,934,506; which was a division of application Ser. No. 08/710,342, filed Sep. 16, 1996, now U.S. Pat. No. 5,704,518: which was a division of application Ser. No. 08/527,755, filed Sep. 1995, now U.S. Pat. No. 5,582,331. All of the prior disclosures are herewith incorporated by reference.
US Referenced Citations (11)
Foreign Referenced Citations (2)
Number |
Date |
Country |
000495734 |
Jul 1992 |
EP |
WO 9421537 |
Sep 1994 |
WO |
Continuation in Parts (1)
|
Number |
Date |
Country |
Parent |
09/322788 |
May 1999 |
US |
Child |
09/477758 |
|
US |