3 results about "Return function" patented technology

The invention provides a remaining needle with a quick blood returning function. The remaining needle comprises a puncture needle, a puncture needle tube connected with the puncture needle, a needle seat and a catheter seat. The puncture needle tube is fixedly mounted on the needle seat. The catheter seat is connected with the needle seat and internally provided with a cavity. The remaining needle is characterized in that the catheter seat is made of a transparent material, the puncture needle tube extends into the cavity of the catheter seat to be plugged into the needle seat, and a first through hole, formed in the tube wall of the puncture needle tube, is further formed in the cavity of the catheter seat and used for puncturing the needle tube to enable the same to be communicated with the cavity of the catheter seat. In this way, when a medical worker punctures the vein of a patient, the blood of the patient flows into the cavity of the catheter seat, made of the transparent material, through the puncture needle and the first through hole, and by observing whether or not the blood returning occurs in the first through hole, the medical worker judges whether or not the puncture needle punctures into the vein of the patient.

A vehicle seat includes a seat bottom and a seat back. The seat bottom includes a forward section and a rear section. The seat back is pivotably mounted about the seat bottom. The seat back is positionable in a reclined position and a folded position. The pivotable link system characteristically positions the forward section of the seat bottom in a lowered position and one or more raised positions.

The invention discloses an oil leakage preventing device of a feet dog rack of a sewing machine. The oil leakage preventing device comprises a feet dog rack, a feet dog rack guide rail, an oil baffle and oil seal sheets. The oil seal sheets are assembled in the oil baffle. The feet dog rack slides on the feet dog rack guide rail in a matched mode. The feet dog rack penetrates through the oil seal sheets. The oil leakage preventing device further comprises an inner oil-proof assembly. The feet dog rack guide rail is located on the inner side of the oil baffle. The inner oil-proof assembly is located on the inner side of the feet dog rack guide rail. The feet dog rack penetrates through the inner oil-proof assembly. Two oil-proof measures are arranged on the feet dog rack, and compared with an existing single oil-proof measure, the oil preventing effect is better; the oil seal sheets on the inner oil-proof assembly are designed into a sawtooth shape, and compared with a plane, oil scraping is more thorough and the oil scraping effect is better; through the cooperation with an oil return tank on the feet dog rack guide rail, oil can be recovered; by arranging the two oil seal sheets in the oil baffle, gaps are formed between the oil seal sheets and the oil baffle, oil scraped from the first oil seal sheet can enter the gaps, oil scraping interference between the first oil seal sheet and the second oil seal sheet is avoided, and meanwhile the oil return function can be effectively achieved. The invention belongs to the technical field of oil leakage prevention of the sewing machine.