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US 4,116,453 AGranted
Multi-part pressure chuck
OwnerEugene R. Andreinventor
Life of this patent
Estimating the term…
Abstract
A holding chuck for parts to be machined utilizing hydrostatic forces for the gripping pressure but including a two-stage gripping action and a multiple area arrangement wherein a combination of a mechanical gripping and a fine hydrostatic pressure lock-up permits use on rough or out-of-round parts with large tolerances as to loading clearance with the advantages of a conforming chuck pressure which prevents distortion of the parts.
Claims7
A work clamp comprising:
- (a) a support body to lie adjacent a work part,
- (b) a plurality of pressure pads movably disposed in said body,
- (c) means to mechanically move said pads to a position contacting a work part and to hold said pads in said position,
- (d) a flexible pressure actuated wall between said pad and said work part having a fluid chamber to receive pressure to urge said wall into holding contact with said part,
- (e) the support body having a plurality of open-topped rectangular recesses disposed about a common axis, each recess having side walls and a base to serve as a slide surface,
- (f) said pressure pads being disposed singularly in said recesses and having side surfaces to cooperate with said side slide surfaces of said recesses, and
- (g) means to bias said pressure pads toward the base of each respective recess.
4 more elements
A work holding clamp for cylindrical work parts of a fragile nature to clamp said parts without distortion which comprises:
- (a) a hollow cylindrical body having a plurality of radial recesses each with parallel chordal sides and open to the interior of said body,
- (b) an axially elongate chuck block radially slidable between the sides of each of said recesses around the axis of said body, each chuck block being tapered on a radially outer side in an axial direction and having a curved inner surface,
- (c) a curved flexible work contact sheath overlying the radially inner surface of each said chuck block peripherally sealed relative to said block to provide a thin pressure fluid chamber between the inner surface of said chuck block and the radially outer surface of said sheath,
- (d) a ring in said body adjacent one end of said radial recesses directly movable axially by a pressure fluid acting thereon, and wedge means axially and respectively disposed adjacent the tapered side of said chuck blocks to shift said blocks radially inward when said ring is moved axially by pressure fluid, and
- (e) means to introduce pressure fluid into said respective pressure fluid chambers to exert a surface clamping pressure on a work part subsequent to radial actuation of said chuck blocks by said wedge means.
2 more elements
Dependencies are inferred from the claim text.