Compressed gas powered caulking gun

• US 4,441,629 A
• Filed: 08/10/1982
• Issued: 04/10/1984
• Est. Priority Date: 08/10/1982
• Status: Expired due to Fees

• Current Assignee: Halkey-Roberts Corp (Atrion Corporation)
• Original Assignee: Glenn H. Mackal
• Inventors: Mackal, Glenn H.
• Primary Examiner(s): Bartuska, F. J.
• Assistant Examiner(s): HUPPERT, MICHEAL
• Application Number:
  US06/406,951
• Time in Patent Office: 609 Days
• Field of Search: 137/115, 137/119, 222/261, 222/262, 222/263, 222/324-327, 222/386, 222/389, 222/396, 222/397, 222/3, 222/399, 222/80, 222/81
• US Class Current: 222/324
• CPC Class Codes: B05C 17/015 with pneumatically or hydraulically actuated piston or the like B05C17/00543 takes precedence
• CPC Class Codes: Y10T 137/262 Increasing pressure progressively closes then reopens by-pass or relief valve
• CPC Class Codes: Y10T 137/2695 Responsive to outlet pressure

Abstract

Pressure reducing and safety discharge valve device adapted for use with compressed gas-containing capsules. The valve has a bore therein in which a spool-shaped valve element is disposed for axial reciprocation. In a first terminal position of the valve element the valve element connects a conduit means leading from a gas-containing capsule discharging gas under moderate pressure to a gas-discharge port of the valve. When the pressure of the gas discharged from the capsule increases to a predetermined value, the valve element moves against the opposition of a spring to cut off further discharge of gas from the capsule; when the pressure of the gas discharged from the capsule increases substantially beyond such predetermined value, the valve element moves still further against the opposition of the spring to discharge such gas through a relief port to the atmosphere.

Claims

1. A pressure reducing and safety discharge valve device adapted for use with compressed gas-containing capsules, comprising a valve body having a first bore therein, a first spool-shaped valve element in the first bore reciprocable axially within the bore, the first valve element having disc-shaped transverse first and second flanges on its opposite ends and an intermediate portion between the flanges of reduced diameter, annular means on the respective flanges having sealing and sliding engagement with the wall of the first bore, resilient means constantly urging the valve element in a first direction toward a first, terminal position thereof wherein the first flange on the valve element lies adjacent a first end of the first bore and the second flange lies remote from the said first end of the first bore, a first conduit means including a first, fluid pressure feeding port in the wall of the first bore disposed to discharge fluid under pressure from a gas-containing capsule into the space within the bore at a location between the flanges on the valve element when the movable valve element is in its first, terminal position, a second, fluid discharge port in the wall of the first bore disposed between the flanges on the valve element when the valve element is in its first, terminal position, and a third, fluid pressure relief port in the wall of the first bore disposed axially in the second direction beyond the other, second flange of the valve element when the valve element is in its first, terminal position, when the valve element is in its first terminal position the distance between the axial distance between the first flange thereof and the second port is substantially less than the axial distance between the second flange and the third port, whereby when the pressure of the fluid medium entering the first port is from zero to a moderate value the valve element does not move from its first, terminal position and gas is delivered from the valve through the second port, but when the pressure of the gas being fed through the first port exceeds a predetermined desired value the valve element is first moved away from its first, terminal position to cut off fluid communication between the first and second ports, and if the pressure of the fluid medium being fed through the first port continues to rise the valve element moves further in the second direction so that communication is established between the first and third ports, whereby to provide fluid pressure relief discharge of the fluid medium through the third port.

2. A device according to claim 1, comprising a selectively operable shut-off valve in said valve body, said shut-off valve being interposed in a second conduit means interposed in the valve body and connected to said second, fluid discharge port.

3. A device according to claim 2, wherein said valve body has means receiving a compressed gas-containing capsule.

4. A device according to claim 3, in combination with a compressed gas-powered tool wherein the valve body forms the handle of said tool.

5. The combination according to claim 4, wherein the tool is a caulking gun having a cylinder receiving a caulking material-containing capsule.

6. A device according to claim 2, wherein the device is adapted for attachment to a conventional compressed air-powered tool to serve as the source of power therefor.