Abstract A shock absorber system for power rams employing a cylinder having a piston with a force-applying shaft coupled thereto, the piston being arranged for reciprocatory motion within the cylinder, and with the piston separating a high pressure chamber segment from a lower pressure chamber segment, the shock absorbing system including conduit means coupling the low pressure chamber segment to orifice means for permitting restricted flow of fluid from the low pressure chamber to the reservoir, and with a pressure relief valve coupled to the low pressure chamber segment, and being disposed in parallel relationship with the orifice to permit fluid flow therethrough when pressure within the low pressure chamber exceeds a certain predetermined level. Flow control valves in the form of pilotactuated check valves are arranged to maintain the system in flooded relationship during idle periods, with the check valves being functional to isolate flow channels during operational portions of the working cycle. The shock abosrber system of the present invention is particularly adaptable for use in conjunction with hydraulically actuated rams utilized to apply extremely high forces to the jaws of stone splitting equipment, with this system reducing the rate of transfer of shock from the hydraulic system to the remainder of the structure upon splitting of the stone, with this shock energy being dissipated in the low pressure side of the hydraulically actuated main rams.
Inventors
👤 T Schlough
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-10-31 08:49
CPC Classifications
B; B28; B28D; B28D1/00; B28D1/22; B28D1/222
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
261 words
In combination, a stone splitter and means for actuating said splitter, said splitter having upper and lower relatively movable cutting jaws normally spaced apart to receive a stone workpiece therebetween, said actuating means including means for applying reciprocatory movement to one of said jaws so as to produce a stone splitting force across said jaws, said actuating means including: a. hydraulic circuit apparatus comprising a source of hydraulic fluid under pressure, first conduit means coupling the outlEt of said source to a fluid working cylinder and second conduit means for returning fluid to the inlet of said pressure source for completion of the hydraulic circuit; b. said fluid working cylinder having a piston with a forceapplying ram coupled thereto with said force-applying ram being operatively coupled to one of said jaws, said piston being arranged for reciprocatory motion within said fluid working cylinder; c. said fluid working cylinder defining first and second chamber segments disposed on opposite sides of said piston, with one of said chambers being adapted to receive a charge of hydraulic fluid from said source under high pressure while the other chamber retains a charge of hydraulic fluid under substantially lower pressure; d. third conduit means coupling said low pressure chamber to orifice means for permitting restricted flow of fluid from said low pressure chamber to said second conduit means; and e. pressure relief valve means coupled to said second conduit means and being disposed in parallel relationship with said orifice means and responsive to permit flow upon achieving fracture of a stone workpiece disposed between said jaws.
Claim 2
Dependent Claim
261 words
In combination, a stone splitter and means for actuating said splitter, said splitter having upper and lower relatively movable cutting jaws normally spaced apart to receive a stone workpiece therebetween, said actuating means including means for applying reciprocatory movement to one of said jaws so as to produce a stone splitting force across said jaws, said actuating means including: a. hydraulic circuit apparatus comprising a source of hydraulic fluid under pressure, first conduit means coupling the outlEt of said source to a fluid working cylinder and second conduit means for returning fluid to the inlet of said pressure source for completion of the hydraulic circuit; b. said fluid working cylinder having a piston with a forceapplying ram coupled thereto with said force-applying ram being operatively coupled to one of said jaws, said piston being arranged for reciprocatory motion within said fluid working cylinder; c. said fluid working cylinder defining first and second chamber segments disposed on opposite sides of said piston, with one of said chambers being adapted to receive a charge of hydraulic fluid from said source under high pressure while the other chamber retains a charge of hydraulic fluid under substantially lower pressure; d. third conduit means coupling said low pressure chamber to orifice means for permitting restricted flow of fluid from said low pressure chamber to said second conduit means; and e. pressure relief valve means coupled to said second conduit means and being disposed in parallel relationship with said orifice means and responsive to permit flow upon achieving fracture of a stone workpiece disposed between said jaws.
Claim 3
Dependent Claim
46 words
The combination as defined in claim 1 being particularly characterized in that fourth conduit means couple said first conduit means to said pressure source inlet, and first fluid control valve means are interposed within said fourth conduit means for controlling flow to said pressure source inlet.
Claim 4
Dependent Claim
22 words
The combination as defined in claim 2 being particularly characterized in that said fluid control valve means is a pilot-actuated check valve.
Claim 5
Dependent Claim
26 words
The combination as defined in claim 2 being particularly characterized in that second fluid control valve means are disposed in parallel relationship with said orifice means.
Claim 6
Dependent Claim
22 words
The combination as defined in claim 4 being particularly characterized in that said second fluid control valve is a pilot-actuated check valve.