Weighing scales – With weigher loading or unloading means – Hand manipulatable weigher
Reexamination Certificate
1999-10-19
2001-06-12
Gibson, Randy W. (Department: 2859)
Weighing scales
With weigher loading or unloading means
Hand manipulatable weigher
C177S232000, C177S233000
Reexamination Certificate
active
06246017
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a scale, and more particularly to a portable scale.
2. Description of the Prior Art
The closest prior art of which the applicant is aware is her prior U.S. Pat. No. 5,922,999 to Yang, issued on Jul. 13, 1999. Almost all of the typical scales comprise a spring member received in a tubular or longitudinal housing and having one end secured to one end of the housing and having a hook secured to the other end thereof and extended outward of the housing for hooking to an object to be weighed. The members, including the spring members, are required to be secured to both ends of the housing and may not be assembled before securing into the housing, such that the scale may not be easily assembled.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional scales.
SUMMARY OF THE INVENTION
The primary objective of the present invention is to provide a portable scale including a configuration to be easily manufactured and assembled.
In accordance with one aspect of the invention, there is provided a scale comprising a housing including a graduation provided thereon, and including an upper portion and a lower portion, a cap detachably secured to the lower portion of the housing, a stem threaded through the cap and including a lower portion having a hook provided thereon for engaging with an object to be weighed, and including an upper portion slidably received in the housing, a head engaged on the upper portion of the stem and moved in concert with the stem for aligning with the graduation and for indicating a weight of the object, and means for biasing the head and the upper portion of the stem away from the cap.
The stem includes a fastener secured to the upper portion thereof and engaged with the head for preventing the head from being disengaged from the stem. The biasing means includes a spring engaged between the head and the cap. The head includes a shaft extended therefrom and engaged into the spring for straightening the spring.
An indicator is further secured to the head and moved in concert with the head for aligning with the graduation and for indicating the weight of the object. The housing includes a slot formed therein for slidably receiving the indicator. A follower is slidably engaged in the slot of the housing and force-fitted to the housing, and is to be moved along the slot of the housing by the head or by the indicator for aligning with the graduation and for indicating the weight of the object.
The housing includes an opening formed in the upper portion thereof and communicating with the slot of the housing for receiving the follower and for allowing the follower to be engaged into the slot. A plug secured in the upper portion of the housing and engaged with the opening of the housing for shielding the opening of the housing.
A rod and/or a bail are laterally engaged through the upper portion of the housing for hanging purposes. The cap includes a bottom portion having a peripheral lip extended radially outward therefrom for engaging with the housing and for preventing the cap from being engaged into the housing. The bottom portion of the housing includes an inner thread formed therein, the cap includes an outer thread threaded with the inner thread of the housing.
Further objectives and advantages of the present invention will become apparent from a careful reading of a detailed description provided hereinbelow, with appropriate reference to accompanying drawings.
REFERENCES:
patent: 273720 (1883-03-01), George
patent: 739035 (1903-09-01), Triner
patent: 756175 (1904-03-01), Meisselbach et al.
patent: 1141562 (1915-06-01), Law
patent: 2488042 (1949-11-01), Thun
patent: 2649299 (1953-08-01), Murphy, Jr.
patent: 2713982 (1955-07-01), Sherbrooke
patent: 3229780 (1966-01-01), Hanssen
patent: 4078625 (1978-03-01), Loeb
patent: 4454831 (1984-06-01), Gallo
patent: 4964479 (1990-10-01), Sumida
patent: 5686704 (1997-11-01), Simser
patent: 5922999 (1999-07-01), Yang
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