Impact device

An impact device for use in clearing a stoppage in a wasteline, comprising:

• (a) a first generally cylindrically shaped casing having an annular shoulder at one end and being open at the opposite end;
• (b) a first piston reciprocally movable within said first casing from a first to a second position;
• (c) a pair of locking members carried by said first piston for radial movement from an extended position to a retracted position, each of said members having a peripheral portion adapted to engage said annular shoulder when said members are in an extended position and each of said members having an aperture therethrough, each said aperture being offset from the axial centerline of said first piston;
• (d) biasing means for yieldably resisting movement of said locking members from an extended position to a retracted position;
• (e) impact means for exerting an impact force against the stoppage in the waste line, said means being disposed at one end of said first casing and comprising:
• (i) an anvil adapted to be forcibly impacted by said piston;
• (ii) an internal chamber disposed adjacent said anvil, said anvil being movable into said chamber a limited distance upon being impacted by said piston;
• (iii) a closure member for partially closing said chamber, including a protruding pipe section defining a passageway leading from said internal chamber to the exterior of the device;
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• (iv) a fitting removably connected to said pipe section for sealable engagement with the inlet of the waste line;
• (f) a second elongated casing closed at one end and telescopically receivable over said first casing at the opposite end for telescopic movement relative to said first casing from a first to a second position;
• (g) an axially disposed elongated connecting rod carried within said second casing having one end connected to said closed end of said second casing and the opposite end connected to said first piston, said rod extending through said apertures formed in said locking members and including engaging means for engaging said locking members to cause radial movement thereof from said extended position into said retracted position upon telescopic movement of said second casing to said second position;
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• (h) an elongated coil spring encompassing said connecting rod having one end thereof in engagement with said closed end of said second casing and having the opposite end thereof in engagement with said first piston.

A waste line cleanout apparatus for use in clearing a stoppage in a wasteline, comprising:

• (a) a first generally cylindrically shaped casing having an annular shoulder at one end and being internally threaded at the opposite end;
• (b) a first piston reciprocally movable within said first casing from a first to a second position said piston having an axially extending bore therethrough;
• (c) a pair of locking members carried by said first piston for radial movement from an extended position to a retracted position, each of said members having a peripheral portion adapted to engage said annular shoulder when said members are in an extended position and each of said members having an aperture therethrough, each said aperture being offset from the axial centerline of the axial bore through said piston;
• (d) a generally cylindrically shaped body being externally threaded at a first end for threadable interconnection with said first casing and being internally threaded at a second opposite end;
• (e) an anvil adapted for limited reciprocal movement within said cylindrically shaped body;
• (f) a second piston disposed within said cylindrically shaped body proximate said anvil, said piston being reciprocally movable within said cylindrically shaped body in response to movement of said anvil;
• (g) a closure member adapted to be threadably interconnected with said cylindrically shaped body at said second end, said closure member including a radially off center, generally cylindrically shaped pipe section protruding outwardly from said closure member;
• (h) a helical spring disposed intermediate said second piston and said closure member for yieldably resisting reciprocal movement of said second piston within said cylindrically shaped body;
• (i) a second elongated casing closed at one end and telescopically receivable over said first casing at the opposite end for telescopic movement relative to said first casing from a first to a second position;
• (j) an axially disposed elongated connecting rod carried within said second casing having one end connected to said closed end of said second casing and the opposite end extending through said axially extending bore of said piston, said rod also extending through said apertures formed in said locating members and including a generally conical shaped central section adapted to engage said locking members to cause radial movement thereof from said extended position into said retracted position upon telescopic movement of said second casing to said second position;
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• (g) an elongated coil spring encompassing said connecting rod having one end thereof in engagement with said closed end of said second casing and having the opposite end thereof in engagement with said first piston.