Plug gauge for checking dimensions of bores of mechanical parts
AssigneeFinike Italiana Marposs S.p.A.
InventorsGuido Golinelli, Narciso Selleri
Life of this patent
Estimating the term…
Abstract
Plug gauge for checking the diameter of a bore, including two movable arms with relevant feelers and a protective body defining two holes for the passage of the feelers. A sealing gasket seals the space between the holes of the protective body and the feelers, preventing the entry of foreign matter, such as chips and coolants, into the protective body.
Claims15
A plug gauge according to claim 1, wherein said sealing means include at least for checking diameters of bores of mechanical parts, comprising an arm-set, the arm-set including two movable arms, two feelers adapted to touch the surface of a bore to be checked, two connective devices for connecting each feeler to a relevant movable arm, and transducer means associated with the movable arms for providing signals indicative of the diameter of the bore;
- and a protective device including a hollow nosepiece adapted for entering the bore, the nosepiece having two opposite openings for the passage of the connective devices, a hollow casing located, at least partially, inside the nosepiece and having two holes in correspondence with the nosepiece openings;
- and a gasket having first portions coupled to the hollow casing, second portions fixed to the connective devices, and third resilient portions connecting the first and the second portions, the gasket being arranged inside the nosepiece and adapted to provide sealing between the holes of the hollow casing and the connective devices, while allowing the displacements of the connective devices and the feelers.
A plug gauge for checking diameters of bores of mechanical parts, comprising:
- a substantially cylindrical, hollow casing having two diametrally opposed holes;
- an armset supported by the casing and including:
- two movable arms arranged within the casing, substantially along the longitudinal direction thereof;
- two connective devices coupled at relevant ends of the movable arms;
- two feelers respectively fixed to the connective devices for displacements substantially along a diametral direction of the hollow casing for touching the surface of a bore to be checked;
- and transducer means coupled to the movable arms for providing a signal indicative of the diameter of the bore;
- a nosepiece adapted for entering the bore, the nosepiece being coupled to the hollow casing and encircling a portion of the hollow casing with an open space therebetween;
- the nosepiece having two holes aligned with the holes of the hollow casing for housing the connective devices while permitting their displacements;
- and
- resilient gasket means partially arranged in said open space intermediate the casing and the nosepiece, the gasket means having first end portions coupled respectively to the hollow casing, second intermediate portions including two annular portions coupled respectively to the connective devices, and third portions connecting the second portions to the first portions, the gasket means providing sealing between said holes of the casing and the connective devices, while allowing said displacements of the connective devices and the feelers.
A plug gauge for checking diameters of bores of mechanical parts, comprising:
- a substantially cylindrical, hollow casing having two diametrally opposed holes;
- an armset supported by the casing and including:
- two movable arms arranged within the casing, substantially along the longitudinal direction thereof;
- two connective devices coupled at relevant ends of the movable arms;
- two feelers respectively fixed to the connective devices for displacements substantially along a diametral direction of the hollow casing for touching the surface of a bore to be checked;
- and transducer means coupled to the movable arms for providing a signal indicative of the diameter of the bore;
- a nosepiece adapted for entering the bore, the nosepiece being coupled to the hollow casing and encircling a portion of the hollow casing with an open space therebetween;
- the nosepiece having two holes aligned with the holes of the hollow casing for housing the connective devices while permitting their displacements;
- and
- a substantially tubular resilient gasket having first end portions coupled respectively to the hollow casing at opposite sides with respect to the holes of the hollow casing, a second intermediate portion defining two annular parts respectively fixed to the connective devices, and third portions connecting the second portion to the first portions, the first and third portions being located in the open space intermediate the casing and the nosepiece, the gasket providing sealing between said holes of the casing and the connective devices, while allowing said displacements of the connective devices and the feelers.
Dependencies are inferred from the claim text.