US PATENT SUBCLASS 401 / 68
.~.~ Screw feed

Current as of: June, 1999
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401 /   HD   COATING IMPLEMENTS WITH MATERIAL SUPPLY

49  DF  SOLID MATERIAL FOR RUBBING CONTACT OR SUPPORT THEREFOR {6}
55  DF  .~ Including means to advance material {15}
68.~.~ Screw feed {8}
69  DF  .~.~.~> Compound screw
70  DF  .~.~.~> With means to disengage screw-feed members
71  DF  .~.~.~> Oppositely oriented helices
72  DF  .~.~.~> Material utilized as threaded advancing element
73  DF  .~.~.~> Breech loading implement
74  DF  .~.~.~> With retrograde-movement retarder
75  DF  .~.~.~> Including means to positively transmit rotation to sliding screw-feed member {2}
79  DF  .~.~.~> Directly actuatable cam members

DEFINITION

Classification: 401/68

(under subclass 55) Implement wherein the advancing means comprises a first member with a substantially helical camming surface and a second member rotatable relative thereto and having a cam element engageable with said camming surface, so that relative rotation between the members will cause an axial displacement therebetween and a corresponding advance of the coating material.

SEE OR SEARCH THIS CLASS, SUBCLASS:

63+, for an implement including screw-feed advancing means and an ejector for discharging a piece of material from a carrier.

65, and indented subclass 66, for an implement including a helical cam follower as part of a step-by-step advancing means.

116, for an implement including screw-feed means for projecting and retracting a tool relative to an enclosing member.

172+, for an implement including screw-feed mechanism to move a force-applying piston axially through a reservoir.

SEE OR SEARCH CLASS 15, Brushing, Scrubbing, and General Cleaning,

429+, and 433, for an implement including a guide# and screw-feed means for advancing a piece of erasive material to and through an opening in the implement to use position.

74, Machine Element or Mechanism, appropriate subclasses, and especially

424.8, for a disclosure of a screw-and-nut mechanical movement.