Cutlery – Cutting tools – Saw
Patent
1997-10-17
2000-01-18
Rachuba, M.
Cutlery
Cutting tools
Saw
83478, 8352212, 83546, B27G 1904, B23D 4516, B27B 900
Patent
active
060148136
ABSTRACT:
A power rotary hand saw (10) with a blade guard 36 mounted for powered movement between a guarding position (FIG. 1) and a nonguarding position (FIG. 2) is moved to the guarding position (FIG. 1) by a separate dedicated electrical motor (46) rotating a drive gear (42) linked with an elongate set of gear teeth (40) and returned when electrical power to the guard drive motor (46) is reversed by a guard control switch (49) separate and apart from a blade drive motor control trigger switch (34). Alternatively, power to the guard drive motor (46) is removed and a coil bias spring (52) return the guard (36) to the guarding position (FIG. 1). The guard driving mechanism (42, 44, 46) is mounted for movement between a drive position (FIG. 1) in which the drive mechanism is linked to the set of gear teeth (40) and a nondrive position in which the drive gear (42) is spaced from linkage with the set of gear teeth (40) and is disabled from responding to actuation of the guard drive power control switch (49).
REFERENCES:
patent: 3922785 (1975-12-01), Fushiya
patent: 4236343 (1980-12-01), Wildman
patent: 4592144 (1986-06-01), Tolbert et al.
patent: 5129300 (1992-07-01), Kawakami
patent: 5579584 (1996-12-01), Hoffman
patent: 5699705 (1997-12-01), Sibbet
patent: 5782001 (1998-07-01), Gray
Rachuba M.
Ring Thomas J.
Vaughn T. Anthony
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