416results about How to "Low sliding resistance" patented technology

The invention discloses a rock sample in-situ fidelity coring system. The rock sample in-situ fidelity coring system comprises a driving module, a fidelity module and a coring module which are sequentially connected, the coring module comprises a rock core drilling tool and a rock core sample storage cylinder, the fidelity module comprises a rock core sample fidelity cabin, the driving module comprises a coring drill rig, and the coring drill rig comprises a drill rig outer cylinder unlocking mechanism; the rock core drilling tool comprises a coring drill tool, a core catcher and an inner corepipe, the coring drill tool comprises an outer core pipe and a hollow drill bit, and the drill bit is connected with the lower end of the outer core pipe; the lower end of the inner core pipe extendsto the bottom of the outer core pipe, and the inner core pipe is in clearance fit with the outer core pipe; and the rock core sample fidelity cabin comprises an inner coring cylinder, an outer coringcylinder and an energy accumulator, the outer coring cylinder sleeves the inner coring cylinder, the upper end of the inner coring cylinder communicates with a liquid nitrogen storage tank, the liquid nitrogen storage tank is located in the outer coring cylinder, the energy accumulator communicates with the outer coring cylinder, and the outer coring cylinder is provided with a flap valve. According to the rock sample in-situ fidelity coring system, the rock core is advantageously kept the state under the in-situ environment, the drilling speed can be increased, and the coring efficiency is improved.

A fastener stringer continuous manufacturing apparatus which eliminates a necessity of increasing a size of a manufacturing apparatus and is capable of chamfering attaching legs of an engaging element which is produced continuously from a metallic wire rod having a Y-shaped section, securely and accurately, without changing a load and stroke of a pressurizing hammer, the manufacturing apparatus comprises a pair of chamfering punches each of which is disposed above the pressurizing hammer at a height corresponding to a preceding engaging element implanted to a fastener tape in advance, the chamfering punch reciprocating with respect to a side face of the preceding engaging element and having a chamfering face which chamfers outer ridge portions of right and left legs of the preceding engaging element.

A bearing bush enabling the excellent advancing and retarding motions of a shaft member by eliminating a clearance between the bearing bush and the shaft member to exclude rattling therebetween, capable of reducing a load on dimensional control for both the bearing bush and the shaft member, and manufacturable at low cost and a compound movement device using the bearing bush. The bearing bush (4) pivotally supporting the reciprocating motion of the shaft member (1) in the axial direction comprises an accepting hole through which the shaft member (1) is inserted. Grooves (40) are repeatedly formed, at specified intervals, in the inner peripheral surface of the bearing bush which faces the accepting hole. The inner diameter of the accepting hole is formed equal to or smaller than the outer diameter of the shaft member (1) to press-fit the bearing bush to the outer peripheral surface of the shaft member (1) by so-called a shrink fitted state.