Invention Grant
- Patent Title: Liquid dispensing syringe and method for reducing piston bounce
- Patent Title (中): 液体分注注射器和减少活塞反弹的方法
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Application No.: US14281296Application Date: 2014-05-19
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Publication No.: US09309042B2Publication Date: 2016-04-12
- Inventor: Henry Digregorio , James A. Gadol , Jeff Groene
- Applicant: Nordson Corporation
- Applicant Address: US OH Westlake
- Assignee: NORDSON CORPORATION
- Current Assignee: NORDSON CORPORATION
- Current Assignee Address: US OH Westlake
- Agency: Baker & Hostetler LLP
- Main IPC: B67D7/60
- IPC: B67D7/60 ; G01F11/00 ; B65D83/00

Abstract:
A liquid dispensing syringe and method for reducing piston bounce includes a barrel and a piston. The barrel defines an interior reservoir having an inner surface. The piston is disposed within the interior reservoir and has a proximal end and an elastic portion configured to expand under the influence of a pressurized gas. A first circumferentially extending wiper seal is positioned on the piston. The first wiper seal liquidly seals against the inner surface. A second circumferentially extending wiper seal is positioned on the piston proximally from the first wiper seal on the elastic portion. As such, the expanding elastic portion forces the second wiper seal to fluidly sealing against the inner surface for inhibiting the pressurized gas from flowing distally beyond the second wiper seal in order to reduce piston bounce.
Public/Granted literature
- US20140367409A1 LIQUID DISPENSING SYRINGE AND METHOD FOR REDUCING PISTON BOUNCE Public/Granted day:2014-12-18
Information query
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