Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1975-12-11
1977-04-19
Jones, Jr., James L.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
81425A, B23P 1904
Patent
active
040179583
ABSTRACT:
The irrigation apparatus includes a quick-connect, self-piercing drip emitter insertable in a plastic pipe to effect a controlled, localized trickle of irrigating water. The apparatus is usable either above the surface of the ground or below the surface and may include a protective wrap to keep dirt from clogging the emitter and to spread the flow of irrigating water over a larger area.
REFERENCES:
patent: 232428 (1880-09-01), Whiting
patent: 2934983 (1960-05-01), Daggitt
patent: 3218696 (1965-11-01), Dritz
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