Adjustable piston packing expander for caulking guns

Details Adjustable piston packing expander for caulking guns Adjustable piston packing expander for caulking guns

1981-10-29

1988-05-03

Rolla, Joseph J.

Dispensing

With discharge assistant

Container with follower

2223865, 92202, 92244, 604219, B67D 542

Patent

active

047414626

ABSTRACT:
An adjustable piston packing expander for use with conventional caulking gun piston assemblies is disclosed. The packing expander threads onto the piston rod and includes a frusto-conical expansion surface which contacts the inner surface of the packing wherein advanced threading of the packing expander onto the piston rod will adjustably expand the packing into sealing engagement with the gun barrel walls. A set screw locks the packing expander in adjustment relative to the packing. A lock washer keyed to the square piston rod and interlocked to a rear piston rod washer having locking pins extending into the packing and forming a part of the piston assembly interlocks the packing against motion relative to the piston rod.

REFERENCES:
patent: 1003304 (1911-09-01), Thompson
patent: 1521890 (1925-01-01), Klein
patent: 1536477 (1925-05-01), Crewe
patent: 1583533 (1926-05-01), Deming
patent: 1735299 (1929-11-01), Rudesyle
patent: 2089556 (1937-08-01), Jackson
patent: 3537621 (1970-11-01), Jesse

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