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Patent Searching and Data


Title:
SQUEEGEE ASSEMBLY HAVING A NON-DESTRUCTIVE RELEASE MODE
Document Type and Number:
WIPO Patent Application WO2001078909
Kind Code:
A3
Abstract:
A wiper assembly (90) for surface maintenance vehicles (20) has a non-destructive failure mode when impacting stationary objects, or otherwise becoming subject to instantaneous or rapidly increasing resistance to forward movement, due to an improved mechanical coupling. Portions (66) of each improved mechanical coupling may either become fully disconnected if the stress force reaches a threshold force value or recoils to the original mounting location after absorbing forces that are less that the threshold force value. The threshold value force is designed to avoid damage to the wiper assembly (90), the articulated mounting member (40)(if any), and the maintenance vehicle (20) itself. The improved mechanical coupling utilizes a resilient, deformable member (66) that adds a modicum of additional travel in response to stress forces imparted to a wiper assembly (90). Accordingly, the teaching of the present invention may be applied to previously manufactured surface maintenance equipment and vehicles in the form of retrofitted mechanical couplings, requiring modest engineering and re-installation efforts.

Inventors:
FEENY STEVEN V (US)
JOYNT DANIEL L (US)
Application Number:
PCT/US2001/012387
Publication Date:
February 21, 2002
Filing Date:
April 17, 2001
Export Citation:
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Assignee:
TENNANT CO (US)
FEENY STEVEN V (US)
JOYNT DANIEL L (US)
International Classes:
A47L11/30; A47L11/40; (IPC1-7): F16B1/00
Foreign References:
US6108859A2000-08-29
US6073304A2000-06-13
US5706547A1998-01-13
US5673450A1997-10-07
US5579555A1996-12-03
US4989288A1991-02-05
US1958658A1934-05-15
US1871918A1932-08-16
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