Manual hydraulically-operated tools

Claim 2

A hydraulically-operated tool comprising a body having a base at an end thereof, a cylinder in and extending longitudinally of the body and secured at a first end to said base, a head having a bell end with a socket therein into which a second end of the cylinder extends, a connecting ring threaded on the cylinder second end and fitting snugly within said socket, said socket and the connecting ring being circular in cross-section, a screw threaded in the ring and tightened against the connecting ring, a ram operatively mounted in the cylinder and projecting from the outer end thereof, a pair of operating jaws mounted on said head, linkage operatively connecting the ram to said jaws, and hydraulic pumping means at the body base operable to close and open said jaws through the ram and linkage.

Claim 3

A tool as claimed in claim 1 in which said socket has an inner wall and said ring has an outer wall accurately made so as to position the head and the jaws thereon accurately relative to the longitudinal center line of said ram.

Claim 4

A tool as claimed in claim 2 in which the inner end of the cylinder is threaded into the base, and said body comprises a cylindrical casing surrounding and spaced from the cylinder and extending between the base and the bell end of the head.

Claim 5

A tool as claimed in claim 3 including a flexible reservoir bag between the cylinder and said casing secured adjacent the first and second ends of the cylinder, said bag being adapted to hold fluid for said hydraulic pumping means.

Claim 6

A hydraulically-operated tool comprising a cylinder, a base secured to a first end of the cylinder, a head at a second end of the cylinder and having a bell end with a socket therein surrounding and enclosing said second end, a casing surrounding the cylinder and removably fitting between the base and the head and spaced from the cylinder to form a reservoir, a ram operatively mounted in the cylinder and slidably extending through a bearing closing said second end of the cylinder, a connecting ring secured to the cylinder second end and fitting snugly within said socket, means removably securing the connecting ring in the socket to the bell end, said socket having a cylindrical wall and said ring having a peripheral surface accurately machined so as to properly position the bell end and head relative to the axis of the ram, a pair of operating jaws mounted on said head, linkage operatively connecting the ram to the jaws, and a hydraulic pumping means at said base operable to move the ram in the cylinder to close and open the jaws through said linkage.

Claim 7

A hydraulically-operated tool comprising a cylinder, a base secured to a first end of the cylinder, a head at a second end of the cylinder and having a bell end with a socket therein surrounding and enclosing said second end, a casing surrounding the cylinder and removably fitting between the base and the head and spaced from the cylinder to form a reservoir, a ram operatively mounted in the cylinder and slidably extending through a bearing closing said second end of the cylinder, a connecting ring secured to the cylinder second end and fitting snugly within said socket, means removably securing the connecting ring in the socket to the bell end, said socket having a cylindrical wall and said ring having a peripheral surface accurately machined so as to properly position the bell end and head relative to the axis of the ram, a pair of operating jaws mounted on said head, linkage operatively connecting the ram to the jaws, and a hydraulic pumping means at said base operable to move the ram in the cylinder to close and open the jaws through said linkage.

Claim 8

A tool as claimed in claim 5 in which a pair of handles are connected to said base and extend outwardly therefrom away from said body, one of said handles being pivotally mounted, and including means operatively connecting said pivotally mounted handle to said pumping means.

Claim 9

A tool as claimed in claim 5 including a closed flexible bag in said reservoir in communication with said pumping means and adapted to supply hydraulic fluid to and to receive the fluid from said pumping means.

Claim 10

A tool as claimed in claim 5 in which said linkage comprises a crosshead mounted on the head to slide towards and away from the cylinder second end, means connecting the crosshead to the ram outside the cylinder, a spring mounted on the head biasing the crosshead towards the cylinder, and a link for each jaw pivotally connected at one end to said each jaw and at an opposite end to the crosshead.

Claim 11

A tool as claimed in claim 5 in which said connecting ring is threadedly mounted on the second end of the cylinder, and said base is threadedly secured to the first end of said cylinder.

Claim 12

A tool as claimed in claim 5 in which said means securing the connecting ring to the bell end comprises at least one set screw threaded in the bell end and tightened against the cOnnecting ring.

Claim 13

A tool as claimed in claim 5 in which said connecting ring is threadedly mounted on the second end of the cylinder, and including a set screw threaded in the connecting ring and tightened against said second end of the cylinder.

Claim 14

A tool as claimed in claim 10 in which said bell end has a hole therein through which said set screw can be reached.

Claim 15

A tool as claimed in claim 11 in which said bell end has a hole therein through which said set screw can be reached.