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A testable sump apparatus comprises a body wall including a first wall with a first wall portion and a second wall with a second wall portion. The first wall portion is spaced from the second wall portion to at least partially define a body wall interstitial space therebetween. The testable sump app

A testable sump apparatus comprises a body wall including a first wall with a first wall portion and a second wall with a second wall portion. The first wall portion is spaced from the second wall portion to at least partially define a body wall interstitial space therebetween. The testable sump apparatus can optionally include at least one spacer located in the body wall interstitial space between the first wall portion and the second wall portion. The sump apparatus can also include an optional test port and an optional fitting mounted to the body wall adjacent the through hole. The fitting, if provided, can at least partially define a fitting interstitial space, wherein the fitting interstitial space may be in fluid communication with the body wall interstitial space.

대표청구항 ▼

A testable sump apparatus comprises a body wall including a first wall with a first wall portion and a second wall with a second wall portion. The first wall portion is spaced from the second wall portion to at least partially define a body wall interstitial space therebetween. The testable sump app

A testable sump apparatus comprises a body wall including a first wall with a first wall portion and a second wall with a second wall portion. The first wall portion is spaced from the second wall portion to at least partially define a body wall interstitial space therebetween. The testable sump apparatus can optionally include at least one spacer located in the body wall interstitial space between the first wall portion and the second wall portion. The sump apparatus can also include an optional test port and an optional fitting mounted to the body wall adjacent the through hole. The fitting, if provided, can at least partially define a fitting interstitial space, wherein the fitting interstitial space may be in fluid communication with the body wall interstitial space. mechanism having a cylindrical body formed of an elastic material, and the cylindrical body being tapered toward a front portion thereof. 2. An applicator according to claim 1; wherein the non-return device is made of a liquid material and a solid material.3. An applicator according to claim 2; wherein the non-return device has a large-diameter portion and a small-diameter portion.4. An applicator according to claim 1; further including a refill disposed in the tubular main shaft body, the refill having a liquid container tube containing therein the liquid, a tip holder press-fitted to a front portion of the liquid container tube, and a ball press-fitted to a front portion of the tip holder; and wherein the non-return device has two kinds of greases disposed at a rear end of the liquid in the liquid container tube to prevent the liquid from flowing out from a rear end of the liquid container tube, and a float made of a synthetic resin and disposed in the liquid container tube with a part of the float embedded in the greases.5. An applicator according to claim 4; wherein the two kinds of greases include an aqueous grease and an oil grease.6. An applicator according to claim 4; wherein the float has a small-diameter portion at a front portion thereof and a large-diameter portion at a rear portion thereof such that the small-diameter portion has a larger diameter than a minimum inner diameter of the tip holder.7. An applicator comprising: a tubular main shaft body containing therein a liquid; compressive means, disposed at a rear portion of the tubular main shaft body, for compressing the liquid; a non-return device positioned at a rear portion of the liquid and movable along with a decrease of the liquid; and a valve mechanism disposed between the non-return device and the compressive means, the valve mechanism being spring-biased in a forward direction by a resilient member, and the movement of the valve mechanism in the forward direction being restricted by a step portion formed at a middle portion of the tubular main shaft body to define a forward stop position of the valve mechanism, whereby the valve mechanism is retractable from and returnable to the forward stop position. 8. An applicator according to claim 7; wherein the valve mechanism is formed of a rubber-like resilient material.9. An applicator comprising: a tubular main shaft body containing therein a liquid; a pushing member, disposed at a rear portion of the tubular main shaft body, movable in a forward direction from a rest position for applying pressurized air into a chamber located in front of the pushing member to pressurize the liquid toward a tip of the applicator; a non-return device positioned at a rear portion of the liquid and movable along with a decrease of liquid; a valve mechanism, disposed between the non-return device and the pushing member, having a normally closed valve in communication with the chamber and openable by the force of the pressurized air to thereby apply the pressurized air to the non-return device; wherein the tubular main shaft body has a groove which communicates the interior and exterior of the tubular main shaft body when the pushing member is in the rest position, and when the pushing member is moved in the forward direction by a pushing operation, the groove is closed by the pushing member. 10. An applicator according to claim 9; wherein a front air space is formed at a front portion of the valve mechanism and a rear air space is formed at a rear portion of the valve mechanism, the front air space communicating with the rear air space by a small through-hole.11. An applicator comprising: a tubular main shaft body containing therein a liquid; a pushing member, disposed at a rear portion of the tubular main shaft body, movable in a forward direction from a rest position for applying pressurized air into a chamber located in front of the pushing member to pressurize the liquid toward a tip of the applicator; a non-return device, positioned at a rear portion of the liquid and movable along with a decrease of the liquid, for preventing backflow of the liquid in the tubular main shaft body; a valve mechanism, disposed between the non-return device and the pushing member, having a normally closed valve in communication with the chamber and openable by the force of the pressurized air to thereby apply the pressurized air to the non-return device; a ball point pen tip fitted to the front portion of the tubular main shaft body; and a ball rotatably positioned at a front end of the ball point pen tip and spring-biased forwardly by a resilient member; wherein the tubular main shaft body has a groove which communicates the interior and exterior of the tubular main shaft body when the pushing member is in the rest position, and when the pushing member is moved in the forward direction by a pushing operation, the groove is closed by the pushing member. 12. An applicator according to claim 11; wherein the non-return device has a liquid portion and a solid portion with the solid portion partly embedded in the liquid portion.13. An applicator comprising: a tubular main shaft body containing therein a liquid; a pushing member, disposed at a rear portion of the tubular main shaft body, movable in a forward direction from a rest position for applying pressurized air into a chamber located in front of the pushing member to pressurize the liquid toward a tip of the applicator; a non-return device, positioned at a rear portion of the liquid and movable along with a decrease of the liquid, for preventing an backflow of the liquid in the tubular main shaft body; a valve mechanism, disposed between the non-return device and the pushing member, having a normally closed valve in communication with the chamber and openable by the force of the pressurized air to thereby apply the pressurized air to the non-return device; a tip holder press-fitted to a front portion of the tubular main shaft body; a ball point pen tip fitted to the front portion of the tip holder; and a ball rotatably positioned at a front end of the ball point pen tip and spring-biased forwardly by a resilient member; wherein the tubular main shaft body has a groove which communicates the interior and exterior of the tubular main shaft body and when the pushing member is moved in the forward direction by a pushing operation, the groove is closed by the pushing member. 14. An applicator according to claim 13; wherein the non-return device has a liquid portion and a solid portion with the solid portion partly embedded in the liquid portion.15. An applicator comprising: a tubular body containing therein a liquid and having at a front end thereof a tip for dispensing the liquid; a non-return device movably disposed in the tubular body rearwardly of and in contact with the liquid for preventing backflow of the liquid in a rearward direction; manually-movable piston member movable in the tubular body, during use to dispense the liquid, in a forward direction for pressurizing air admitted into a chamber located in front of the piston member; and a normally closed valve spaced from the piston member and in communication with the chamber and openable by the force of the pressurized air to apply the pressurized air to the non-return device to urge the non-return device forwardly to thereby pressurize the liquid. 16. An applicator according to claim 15, further including a ball rotatably disposed at a front end of the tip of the applicator.17. An applicator according to claim 16; wherein the applicator is a ball point pen.18. An applicator according to claim 15; wherein the non-return device comprises one or more kinds of greases, and a float having a front portion embedded in the one or more kinds of greases and a rear portion to which is applied the pressurized air.19. An applicator according to claim 18; further including a ball rotatably disposed at a front e