Spring devices – Vehicle – Bolster
Patent
1977-06-02
1979-07-24
Makay, Albert J.
Spring devices
Vehicle
Bolster
105197DH, 188315, 267 3, 267 8A, B61F 512, B61F 524, F16F 924, F16F 936
Patent
active
041620623
ABSTRACT:
A main body member having a head member bolted to one end defines the primary cylinder end portion of a single-ended hydraulic cylinder. A piston rod bearing insert is pressed into the main body bore which defines a cylinder bore. A piston is bolted to a piston rod which extends upwardly through the bearing insert. The piston rod bearing, piston and rod define the primary rod end portion of the single-ended hydraulic cylinder. The above mentioned components define the entire primary structure of a single-ended hydraulic cylinder system and as such provides the entire primary load bearing circuit of a hydraulic cylinder system. A housing member fits about a part of the main body member and the two define a hydraulic fluid reservoir. The piston return spring is an external spring surrounding the piston rod. As the piston is forced into the cylinder the oil displaced from the high pressure portion of the cylinder flows to the reservoir through valving means and passageways which extend upwardly through the piston head, through a relief between the piston head and piston rod and out to a chamber about the piston rod and then through bores into the reservoir. All oil displaced from the high pressure portion of the cylinder is replaced in this region from the head end of the cylinder during return motion of the rod. The return flow is accommodated through passageways in the cylinder body member and the head member which includes an annular recess adjacent the cylinder wall of the main body member.
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patent: 3874307 (1975-04-01), Schwam
Beltran Howard
Makay Albert J.
Miner Enterprises Inc.
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