Air pressure measuring pen
First Claim
Patent Images
1. An air pressure measuring pen comprising a transparent hollow pen tube having a top end and a bottom end, an ink holder positioner connected to said bottom end, a clipping cover connected to said top end, characterized in that:
- said air pressure measuring pen further includes;
a stopping medium received in said bottom end;
a piston received in said pen tube;
a spring urging said piston apart from said medium;
a check valve in said clipping cover; and
cooperating with said piston to form therebetween an air chamber;
said clipping cover includes an exhausting valve capable of communicating with said air chamber, a measuring head at a top thereof, an actuating protrusion mounted in said measuring head, and an air passage provided around said protrusion and communicable with said air chamber through said check valve so that when said head is inserted upon an air valve of a tire, air in said tire will pass through said passage and check valve into said air chamber thereby depressing said piston toward said stopping medium by compression of the spring; and
said pen tube includes a lower vent and an outer pressure scale to cooperate with the piston and provide an indication of tire pressure dependent on the amount of compression of the spring.
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Abstract
An air pressure measuring pen of a neat and satisfactory design is provided. The pen includes a transparent hollow pen tube having a top end and a bottom end, a clipping cover connected to the top end and having an exhaust valve, a check valve and a measuring head, a spring urging in the pen tube apart a stopping medium and a piston in the pen tube, an ink holder, and an ink holder positioner connected to the bottom end.
44 Citations
6 Claims
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1. An air pressure measuring pen comprising a transparent hollow pen tube having a top end and a bottom end, an ink holder positioner connected to said bottom end, a clipping cover connected to said top end, characterized in that:
said air pressure measuring pen further includes; a stopping medium received in said bottom end; a piston received in said pen tube; a spring urging said piston apart from said medium;
a check valve in said clipping cover; and
cooperating with said piston to form therebetween an air chamber;said clipping cover includes an exhausting valve capable of communicating with said air chamber, a measuring head at a top thereof, an actuating protrusion mounted in said measuring head, and an air passage provided around said protrusion and communicable with said air chamber through said check valve so that when said head is inserted upon an air valve of a tire, air in said tire will pass through said passage and check valve into said air chamber thereby depressing said piston toward said stopping medium by compression of the spring; and said pen tube includes a lower vent and an outer pressure scale to cooperate with the piston and provide an indication of tire pressure dependent on the amount of compression of the spring. - View Dependent Claims (2, 3, 4, 5, 6)
Specification
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Current AssigneeRaymond Hwang
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Original AssigneeRaymond Hwang
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InventorsHwang, Raymond
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Primary Examiner(s)WOODIEL, DONALD
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Application NumberUS07/533,438Time in Patent Office728 DaysField of Search73/146.8, 73/146.3, 73/744, 73/714, 116/34 RUS Class Current73/146.8CPC Class CodesB43K 29/08 with measuring, computing o...G01L 17/00 Devices or apparatus for me...
