Gear cutting – milling – or planing – Broaching – Process
Patent
1991-07-19
1992-10-06
Howell, Daniel W.
Gear cutting, milling, or planing
Broaching
Process
B23D 3700
Patent
active
051526468
ABSTRACT:
A method for the production of an internal slide surface on a guide sleeve of plastic material for a length-adjustable chair column consists in that the internal surface of the guide sleeve is provided with surfaces, which are undersize in proportion to a to-be-guided housing of a gas spring. Recesses are located between the individual surfaces and are oversize in proportion to the housing of the gas spring to be guided. Partial cylinder surfaces are broached in the surfaces between the recesses by broaching and in common they represent a slide surface. These measures ensure impeccable broaching with high surface quality and dimensional precision of the slide surface. Moreover, the remaining recesses, which may have the form of grooves of arbitrary cross-section, can be used as storage chambers for a lubricant.
REFERENCES:
patent: 1310933 (1919-07-01), Suverkrop et al.
patent: 2324083 (1943-07-01), Holmes
patent: 4899969 (1990-02-01), Bauer et al.
patent: 4916749 (1990-04-01), Urban et al.
Patent Abstracts of Japan, vol. 8, No. 76 (M-288)(1513) Apr. 9, 1984 & JP-A-58 221 018 (Toyota Jidosha Kogyo K.K.) *Zusammenfassung; Abbildungen 4*.
Howell Daniel W.
Suspa Compart Aktiengesellschaft
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