Buoys – rafts – and aquatic devices – Rafts – Inflatable
Patent
1986-11-17
1988-01-19
Wilson, Neill
Buoys, rafts, and aquatic devices
Rafts
Inflatable
411311, 411908, F16B 3932
Patent
active
047202254
ABSTRACT:
The system comprises an at least partially threaded male member of plastics material including one or more first discontinuities, such as a bolt with a plurality of substantially rigid webs between portions of a helical rib thereon, and an at least partially threaded female member of plastics material including one or more second discontinuities, such as a nut with a resiliently deflectable tongue whose free end is located beyond one end of the helical rib therein.
Threaded advance of the male member, relative to the female member, causes deflection and resilient return of the first and/or second discontinuities as they pass one another, such as deflection and resilient return of the tongue as it passes each of the webs, to give an audible click and an abrupt change in drive torque or other tangible indication of the extent of said threaded advance.
REFERENCES:
patent: 879714 (1908-02-01), Abe
patent: 1211391 (1917-01-01), Blackwelder
patent: 2015159 (1935-09-01), Rosenberg
patent: 2484645 (1949-10-01), Baumle
patent: 3711138 (1973-01-01), Davis
patent: 4478545 (1984-10-01), Mizusawa et al.
IBM Technical Disclosure Bulletin, vol. 20, No. 6, Nov. 1977 (1 sheet, 3 Figures).
Buckman T. W.
ITW Limited
O'Brien J. P.
Wilson Neill
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