Pumps – Expansible chamber type – Distributor formed from integral portion of flexible wall...
Patent
1988-04-11
1989-04-25
Croyle, Carlton R.
Pumps
Expansible chamber type
Distributor formed from integral portion of flexible wall...
417478, 417472, 417566, 417234, 92 34, 251 9, 200 83C, 200 83Z, F04B 4308, F16L 5514, F16J 304
Patent
active
048243400
ABSTRACT:
A pneumatic system (10) is shown in its most preferred use in a spray gun (12) to remotely control a pressure washer. The system (10) generally includes an integrally formed, homogeneous squeeze box (40) including a location ear (52), a nose tube (46), a bellows (44) and a discharge tube (48). Bellows (44) is generally rectangular in cross section and includes a flat top (62) and bottom (63) and accordion sides (64) having generally longitudinal fold lines (72, 74, 76, 78, 80) which are generally parallel to the mold part line (93) and the tubes (46, 48) but include a 2.degree. draft for ease in mold removal. A valve and spring tube (42) is loosely received on the nose tube (46) for sealing a vent hole (60) provided therein when the bellows (44) is compressed by a trigger (30) of gun (12) and for biasing the trigger (30) to an uncompressed bellows condition. In its most preferred form, the squeeze box (40) is blow molded, with the bellows cavities (44') of the mold halves (92, 94) having a generally trapezoidal cross section defining major longitudinal undercuts (102).
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Steere Enterprises, Inc., Blow Molded Bellows, .COPYRGT. 1982.
Bruggeman Jon
Simonette Dallas W.
Blackmon Robert N.
Croyle Carlton R.
Power Flo Products Corp.
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