Gear cutting – milling – or planing – Milling – Randomly manipulated – work supported – or work following device
Patent
1993-05-18
1994-05-10
Briggs, William
Gear cutting, milling, or planing
Milling
Randomly manipulated, work supported, or work following device
1441340, 144136C, 408112, B23C 120, B27C 500
Patent
active
053102967
ABSTRACT:
A plunge router (10) is disclosed which has a base (12), a pair of laterally spaced apart columns (14, 16) and a motor housing assembly (18). The base (12) has a planar work engaging surface (22). Affixed to the base (12) are the laterally spaced columns (14,16) which extend perpendicular to the work engaging surface (22). The motor housing assembly (18) has a housing (24), preferably plastic, which supports a pair of bushings (46,48) which slide upon the columns (14,16) to permit the motor housing assembly (18) to move relative to the base (12). One of the bushings (46) is relatively securely held by the housing (24) while the other bushing (48) is elastically mounted relative to the housing (24) to enable limited movement of the bushing (48) relative to the housing (24). This mounting prevents binding between the bushings (46,48) and the columns (14,16) and accommodates production tolerances and variations and thermal expansions and contractions of the housing (24), the base (12) and columns (14,16). Preferably, the plunge router (10) includes an annular elastomeric member (78,80) interposed between the elastically mounted bushing (48) and the housing (24) to accommodate limited radial movement of the housing (24) relative to the bushing (48).
REFERENCES:
patent: 1581719 (1926-04-01), Carter
patent: 4445811 (1984-05-01), Sanders
patent: 4770573 (1988-09-01), Monobe
patent: 4938264 (1990-07-01), Ferenczffy
"Routers", Wood Magazine, Nov. 1992, pp. 72-73.
Briggs William
Ryobi Motor Products
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