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US 12,759,012 B2Granted
Plungers for sealant dispensing cartridges with collapsible sealant packaging
AssigneePRC-DeSoto International, Inc.
InventorsPaul Kuchinski, Oscar Santillan
Life of this patent
Estimating the term…
Abstract
Plungers (50) for use in sealant dispensing cartridges with collapsible sealant packaging (40) are disclosed. The plungers include anti-bypass retainers (60) to reduce or prevent unwanted passage of the flexible sealant packaging around the edges of the plungers during sealant dispensing operations.
Claims22
A plunger assembly for use in a sealant dispensing cartridge comprising:
- a plunger comprising a cylindrical body and front end;
- and
- an anti-bypass retainer contacting the plunger comprising a front portion and an anti-bypass rim structured and arranged to expand radially outward when force is applied to the front portion, wherein the anti-bypass rim has an outer diameter less than or equal to an outer diameter of the plunger prior to the application of the force to the front portion, and has another outer diameter equal to or greater than the outer diameter of the plunger after the application of the force to the front portion.
A sealant dispensing system comprising:
- collapsible sealant packaging comprising a rigid front end including a front opening and a flexible sidewall extending rearwardly from the rigid front end;
- an inner sleeve structured and arranged to receive the flexible sidewall;
- and
- a plunger with an anti-bypass retainer inserted in the inner sleeve structured and arranged to slide forwardly along a longitudinal axis of the inner sleeve and press against a rear end of the flexible sidewall when air pressure is applied against a rear surface of the plunger, wherein the anti-bypass rim has an outer diameter less than or equal to an outer diameter of the plunger prior to the application of the force to the front portion, and has another outer diameter equal to or greater than the outer diameter of the plunger after the application of the force to the front portion.
1 more element
A plunger assembly for use in a sealant dispensing cartridge comprising:
- a plunger comprising a cylindrical body and front end;
- and
- an anti-bypass retainer contacting the plunger comprising a front portion and an anti-bypass rim structured and arranged to expand radially outward when force is applied to the front portion, wherein the anti-bypass retainer is secured to the plunger by a retainer attachment post comprising a rear flange attached to a front end of the plunger and a cylindrical body extending axially forward from the flange in contact with the anti-bypass retainer.
A sealant dispensing system comprising:
- collapsible sealant packaging comprising a rigid front end including a front opening and a flexible sidewall extending rearwardly from the rigid front end;
- an inner sleeve structured and arranged to receive the flexible sidewall comprising at least one front vent notch in a front end of the inner sleeve;
- a plunger with an anti-bypass retainer inserted in the inner sleeve structured and arranged to slide forwardly along a longitudinal axis of the inner sleeve and press against a rear end of the flexible sidewall when air pressure is applied against a rear surface of the plunger;
- and
- a front-loading outer retaining sleeve containing the inner sleeve.
2 more elements
A sealant dispensing system comprising:
- collapsible sealant packaging comprising a rigid front end including a front opening and a flexible sidewall extending rearwardly from the rigid front end;
- an inner sleeve structured and arranged to receive the flexible sidewall;
- a plunger with an anti-bypass retainer inserted in the inner sleeve structured and arranged to slide forwardly along a longitudinal axis of the inner sleeve and press against a rear end of the flexible sidewall when air pressure is applied against a rear surface of the plunger;
- and
- a rear-loading outer retaining sleeve containing the inner sleeve.
2 more elements
Dependencies are inferred from the claim text.