Work holders – With fluid means – Cylinder-piston means in series with additional positioning...
Patent
1997-04-17
1998-12-08
Smith, James G.
Work holders
With fluid means
Cylinder-piston means in series with additional positioning...
269 28, 269 30, 269903, B23Q 308
Patent
active
058458972
ABSTRACT:
A toggle lever clamp device for automobile body fabrication comprises a clamp housing (1) having a rectangularly shaped cross section wherein the cross-section is taken at a right angle to an axial direction of the housing. The housing is comprised of two parts (12, 13) and has a slot (19) on a rear side thereof that extends in the axial direction. The toggle lever clamp device further includes a cylinder (2) coupled to an end of the housing in the axial direction, a piston (6) axially located in the cylinder so that pressure can be exerted alternately on either side thereof, a piston rod (7) coupled to the piston (6) and extending axially through a part of the cylinder (2) and into a hollow space in the clamp housing (1); and a toggle lever joint arrangement (10) secured to a free end of the piston rod (7). An integral replaceable monitoring cassette (20) forms a cover in the area of a slot (19). The monitoring cassette (20) has a "T" shape including a mounting rail and a flange (25) to which an extending section (21) attaches with its longitudinal axis parallel to a longitudinal axis (18) of the piston rod. The monitoring cassette (20) further comprises a printed circuit board and an adjustable sensor means (22, 23) integrally mounted thereon so that the adjustable sensor means (22, 23) is responsive to the position of the piston rod (7). The monitoring cassette (20) is inserted into the slot (19) while retaining an ability to attach the clamp housing from all four sides, including the rear side, such that the section (21) seals the slot (19) as tightly as possible.
REFERENCES:
patent: 3371953 (1968-03-01), Blatt
patent: 3482831 (1969-12-01), Blatt
patent: 4635911 (1987-01-01), Lovrenich
patent: 4664364 (1987-05-01), Lymburner
patent: 4905973 (1990-03-01), Blatt
patent: 5072652 (1991-12-01), Blatt
patent: 5201838 (1993-04-01), Roudaut
patent: 5503378 (1996-04-01), Schauss et al.
Smith James G.
Tunkers Maschinenbau GmbH
Wilson Lee
LandOfFree
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