APPARATUS FOR REMOVING GASES

• US 3,822,719 A
• Filed: 04/16/1973
• Issued: 07/09/1974
• Est. Priority Date: 04/18/1972
• Status: Expired due to Term

• Current Assignee: AB Ph. Nederman & Co. (Nederman Holding AB)
• Original Assignee: Bill Nederman
• Inventors: Nederman, Bill
• Primary Examiner(s): Klinksiek, Henry T.
• Application Number:
  US05/351,352
• Time in Patent Office: 449 Days
• Field of Search: 137/355.16,355.17,355.18,355.19,355.20,355.21,355.22,355.23,355.24,355.25
• US Class Current: 137/355.26
• CPC Class Codes: B08B 15/002 using a central suction system, e.g. for collecting exhaust gases in workshops removing dust from textile machines D01H11/00; ventilation of mines, galleries or tunnels, e.g. traffic tunnels, E21F1/00
• CPC Class Codes: B65H 75/4434 actuated by pulling on or imparting an inclination to the material
• CPC Class Codes: Y10T 137/694 Responsive to position of hose in casing
• CPC Class Codes: Y10T 137/6954 Reel with support therefor

Abstract

An apparatus for removing gas and similar fluids from closed areas comprises a frame in which a drum is rotatably mounted. An outlet socket is set axially into one end of the drum in fixed relation to the frame and a hose is wound on the drum and has one end connected inside the drum to the outlet socket. A spiral spring device is mounted on a shaft fixed axially to the other end of the drum for rotating the drum to wind up the hose. Stop elements are provided on the hose and the frame to stop the winding of the drum and a releasable catch is secured to the frame and cooperates with tooth segments on the spring device to hold the drum in the desired position.

Claims

1. In a gas removal apparatus having a frame on which a winding drum is rotatably mounted, a gas outlet fixed on the frame at the axis of the drum, a hose windable on said drum and having one end sealingly connected to the gas outlet, a spring device for rotating the drum to wind the hose thereon, cooperating stop means on the hose and frame for limiting the winding of hose on the drum, and releasable catch means on the frame and engageable with the spring device to hold said drum in a desired position of rotation against the action of said spring device;

the improvements comprising;

said frame having spaced drum supporting portions to which opposite ends of said drum are journalled, said spring device being mounted on one end of said drum and said catch means being mounted on the adjacent frame portion, the other end of said drum having an axial sleeve sealingly journalled relative to said gas outlet and which an end of said hose sealingly surrounds;

said spring device comprising an annular member concentric to said drum and having recess means in its outer periphery, said catch means being engageable in said recess means to lock said drum against rotation in one direction but being released therefrom when said drum is rotated in the other direction;

said cooperating stop means comprising a roller on said frame parallel to the axis of said drum and spaced from the surface of said drum a distance greater than the diameter of said hose but less than the corresponding diameter of a stop member releasably secured on said hose for selective adjustment therealong; and

said hose having a handle means at its outer end and a connector for connecting said outer end to the exhaust pipe of a motor vehicle.

2. Apparatus as defined in claim 1 wherein said axial sleeve is fixedly and sealingly secured to said drum.

3. Apparatus as defined in claim 1 wherein said spring device includes two spiral springs arranged in side-by-side relation and having their ends connected, respectively, to said annular member and said adjacent frame portion.