Bump-feed trimmer

Details Bump-feed trimmer Bump-feed trimmer

1982-01-12

1983-12-13

Meister, James M.

Cutlery

Cutting tools

With blade moving means

56 127, B26D 112

Patent

active

044198221

ABSTRACT:
A bump-feed monofilament string trimmer has a sleeve-like escapement member (52) axially slidable on a drive member (42) and nested in a spool member (66) which holds a coil (71) of cutting filament. Axially downwardly extending fingers (84) of the escapement member (52) engage in window-like slots (92) in a downwardly extending dome-like protrusion (16) of the spool member (66) to prevent relative rotation between the two members (52,66). The fingers (84) have external screw threaded portions (86) which extend through the slots (92) and are engaged by a nut (18) which releasably secures the spool member (66) to the escapement member (52). The driving member has teeth (88) which normally drivingly engage with an upper series of internal clutch teeth (58) of the escapement member, and temporarily engage with a lower series of clutch teeth (102, 104) when the dome-like protrusion (16) is "bumped" on the ground, whereby discrete lengths of cutting filament are let out from the spool member (66).

REFERENCES:
patent: 4183138 (1980-01-01), Mitchell
patent: 4189830 (1980-02-01), Pittinger
patent: 4203212 (1980-05-01), Proulx
patent: 4274201 (1981-06-01), Oberg et al.

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