Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1975-04-25
1978-02-14
Lanham, C. W.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
165172, B23P 1526
Patent
active
040730450
ABSTRACT:
There is provided a convector for heating rooms and a method for manufacturing same. This convector comprises a plastic tube wound to form a flat coil. The plastic used for the tube is preferably a cross-linked plastic, such as cross-linked polyethylene. Some of the coil-turns may be displaced inwards or outwards from the basic shape of the tube coil, in order to improve the convection.
REFERENCES:
patent: 1634812 (1927-07-01), Whitehead
patent: 1901090 (1933-03-01), Eule et al.
patent: 1993171 (1935-03-01), Hyde
patent: 2056862 (1936-10-01), Markley, Jr.
patent: 2657020 (1953-10-01), Hoffmeister
patent: 3277959 (1966-10-01), Withers
Bosaeus Jan A.
Grimstedt Harry E.
Margen Peter H. E.
Aktiebolaget Atomenergi
Lanham C. W.
Rising V.
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