# US 2013/0152855 A1 · Pneumatic repair mortar gun

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- Number: US 2013/0152855 A1
- Document ID: US20130152855A1
- Status: Published application
- Kind: A1
- Application number: 13/374,204
- Filed: 2011-12-14
- Published: 2013-06-20
- Earliest claimed: 2011-12-14
- Inventors: Mark Allen Hartman; Charles Fredric Hartman
- Web page: https://patentgrep.com/patent/US20130152855A1

## CPC

- B05C 17/015: with pneumatically {or hydraulically} actuated piston or the like {(B05C17/00543 takes precedence)}
- B05B 7/0441: {with one inner conduit of liquid surrounded by an external conduit of gas upstream the mixing chamber}
- E04F 21/12: acting by gas pressure, e.g. steam pressure
- E04G 23/0203: {Arrangements for filling cracks or cavities in building constructions}
- B05C: APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL (spraying apparatus, atomising apparatus, nozzles B05B; plant for applying liquids or other fluent materials to objects by electrostatic spraying B05B5/08)
- B05B: SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES (spray-mixers with nozzles B01F25/72; processes for applying liquids or other fluent materials to surfaces by spraying B05D)
- E04F: FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS (windows, doors E06B)
- E04G: SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS

## Abstract

One embodiment of a hand held elongated material cylinder (4), capped on one end having a pistol gripped trigger assembly (8), for the introduction of compressed air against free floating piston (6), utilized for the propulsion of wet-mix cementitous materials, loaded in the opposing side of the cylinder (4), enclosed with a nozzle cap (10), introducing compressed air around its tapered circumference, used for expelling the propelled material through a flexible nozzle tip (12) with a reduced aperture, at velocity to a described substrate needing repair or coating.

## Claims

### Claim 1

A hand held machine for the pneumatic application of cementitious materials in small quantities comprising;
a. an elongated pneumatic cylinder with a free floating piston inside capped on one end with an inlet,
b. attached at said inlet a pistol gripped trigger assembly utilized to introduce compressed air behind said piston when trigger is depressed and having cementitious material loaded on opposing side of said piston, material is propelled forward into a nozzle cap,
c. said nozzle cap on the opposing end of said cylinder tapering down to a predetermined diameter, where material propelled forward enters said nozzle cap, which contains air inlet holes around the circumference thereof,
d. compressed air introduced at said inlet holes propels the material through a flexible nozzle tip with a reduced aperture, expelling the material at velocity.