![]() 2, in which the forward end of the plunger stem I I lies within and a short distance inwardly from the forward end of the tube 3, in which position such end of the plunger stem is enclosed and protected from injury or contamination by contact with extraneous objects.įitted to slide upon the cylinder is a sleeve I4 which is normally disposed in the position shown in Fig. The two springs operate in balancing relation to normally hold the plunger in the position shown in Fig. Another spring I3 is arranged to bear at its forward end against the rear end of the plunger body and extends from the cylinder member I through the nipple 6 into the socket 8 of the member 2 and operates to hold the plunger pressed forwardly and to resist its rearward movement except to a predetermined degree under the action of the spring I2. A coiled spring I2 is disposed in the forward portion of the chamber 4 between the plunger body I0 and the front wall of said chamber and acts to hold the plunger normally retracted. Mounted to slide in the cylinder member is a plunger comprising a plunger body I0, which fits and slides in the chamber 4 and a reduced plunger portion orstem I I which is fitted to slide in the bore of the tube 3. A61B17/50- Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body.A61B17/00- Surgical instruments, devices or methods, e.g.A61B- DIAGNOSIS SURGERY IDENTIFICATION.A61- MEDICAL OR VETERINARY SCIENCE HYGIENE.238000005859 coupling reaction Methods 0.000 description 8.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Application filed by Frank W Benton filed Critical Frank W Benton Priority to US357307A priority Critical patent/US2267636A/en Application granted granted Critical Publication of US2267636A publication Critical patent/US2267636A/en Anticipated expiration legal-status Critical Status Expired - Lifetime legal-status Critical Current Links ![]() ![]() ![]() Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Expired - Lifetime Application number US357307A Inventor Frank W Benton Original Assignee Frank W Benton Priority date (The priority date is an assumption and is not a legal conclusion. Google Patents US2267636A - Blackhead extractorÄownload PDF Info Publication number US2267636A US2267636A US357307A US35730740A US2267636A US 2267636 A US2267636 A US 2267636A US 357307 A US357307 A US 357307A US 35730740 A US35730740 A US 35730740A US 2267636 A US2267636 A US 2267636A Authority US United States Prior art keywords plunger cylinder tube blackhead extractor Prior art date Legal status (The legal status is an assumption and is not a legal conclusion.
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