Motor vehicles – Steered by walking attendant
Reexamination Certificate
2005-01-11
2005-01-11
DePumpo, Daniel G. (Department: 3611)
Motor vehicles
Steered by walking attendant
C180S019300
Reexamination Certificate
active
06840339
ABSTRACT:
A towbar head for a towbar-guided industrial truck includes control elements located on the towbar head. The control elements control various functions of the industrial truck such as the propulsion and/or the controls for a lifting device. The control elements are effectively connected to signal generators (4, 5) to generate electrical control signals. The invention teaches that there are at least two signal generators (4, 5) which are preferably in the form of membrane switches located on a common circuit board (3). In one embodiment, at least-one membrane switch has a plurality of contact areas4b, 5b) located on the common circuit board (3). The common circuit board (3) has at least one contact membrane (13) that can be electrically connected with a contact surface (4a, 4b, 5a, 5b) or a resistance track by a pressure force exerted on the contact membrane (13). Preferably, all the signal generators located on the common circuit board (3) are in the form of membrane switches.
REFERENCES:
patent: 4283072 (1981-08-01), Deloach, Jr.
patent: 4308439 (1981-12-01), Itoh
patent: 4405841 (1983-09-01), Van Zeeland
patent: 4493219 (1985-01-01), Sharp et al.
patent: 4845803 (1989-07-01), King
patent: 5042314 (1991-08-01), Rytter et al.
patent: 5361644 (1994-11-01), Nedele et al.
patent: 5430262 (1995-07-01), Matsui et al.
patent: 5508703 (1996-04-01), Okamura et al.
patent: 5586668 (1996-12-01), Miller
patent: 5675309 (1997-10-01), DeVolpi
patent: 5909891 (1999-06-01), Swart et al.
patent: 5952630 (1999-09-01), Filion et al.
patent: 6285276 (2001-09-01), Nedele et al.
patent: 3811009 (1988-11-01), None
patent: 4111675 (1994-06-01), None
patent: 9417201 (1995-02-01), None
patent: 4444772 (1996-06-01), None
Bruder Frederic
Maller Pierre
Nedele Hartmut
Schöller Eugen
Weber Edgar
DePumpo Daniel G.
Still & Saxby S.A.R.L.
Webb Ziesenheim & Logsdon Orkin & Hanson, P.C.
LandOfFree
Towbar head for a towbar-guided industrial truck does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Towbar head for a towbar-guided industrial truck, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Towbar head for a towbar-guided industrial truck will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3419607